You can upgrade lighting at your factory to LED bulbs that cost $6.95 each and last an average of 5 years. It costs $3 in labor to change a bulb. Over a 10-year period, about how much will it cost per year to install LED bulbs in 100 lamps and change the bulbs when they burn out?


Answers

Answer 1
Each bulb and the labor to install it costs
.. $6.95 +$3 = $9.95

100 bulbs and 10 years totals (100*10) = 1000 bulb·years. For the price of $9.95, you purchase 5 bulb·years, so the total cost for 1000 bulb·years is
.. (1000 b·y)*($9.95/(5 b·y)) = $1990

Over a 10-year period, installation and replacement of 200 bulbs in 100 lamps will cost $1990. Then the per-year cost is ...
.. $1990/(10 yr) = $199/yr
Answer 2

Answer: $200.00

Step-by-step explanation:

$6.95+ $3.00= $19.90

$19.90 * 100= $1,990

$1,990 / $9.95 = $200.00

take the orginal cost 6.95 plus the $3 labor which equals 19.90 then you multiply by the number of bulbs 100 which equals 1990 then divide 1990 by the cost of bulbs 9.95 which equals 200!


Related Questions

PLZ SOMEONE HELP ME ON THIS

Answers

It just might be the first one,
I may be wrong let me know
Hope it helps

9x^2 - 8x - 1 = 0
What are the x intercepts?

Answers

9x^2  - 8x - 1 = 0

(9x + 1(x - 1) = 0

x = -1/9 , 1  

x intercepts are -1/9 and 1.

the product of two rational numbers

Answers

Answer:

'The product of two rational numbers is rational'                        

Step-by-step explanation:

Statement 'The product of two rational numbers'.

We know that, 'The product of two rational numbers is rational'.

We can prove it,

Let [tex]\frac{a}{b}[/tex] and [tex]\frac{p}{q}[/tex] are two rational number.

Where, a,b,p,q are integers and [tex]b,q\neq 0[/tex]

Now, Product the two rational number

[tex]\frac{a}{b}\times \frac{p}{q}=\frac{ap}{bq}[/tex]

Since, ap and bq are integers and [tex]bq\neq 0[/tex]

Thus, [tex]\frac{ap}{bq}[/tex] is an fraction with integers in the numerator and denominator making it a rational number.

Therefore, 'The product of two rational numbers is rational' is true.

Using your knowledge of circles, label the following on the given diagram: chord, tangent, radius, secant, point of tangency and diameter. Name a minor arc and a major arc.

Answers

A chord is any line that touches two ends on a circle. Line segment AC is a chord.

A tangent is a line that only touches one point on the circle. The purple line on top of the circle is a tangent line.

A radius is a line from the center to any point on the circle. The red line is a radius.

A secant is like a chord, except it is a line and keeps going. The cyan (sky blue) line is a secant line.

A point of tangency is the point that the tangent line touches. The yellow point on the purple line is the point of tangency.

A diameter is a straight line that crosses the center and two points on the circle. You can say it’s two radii put together. Line segment BD (green) is a diameter.

Hope this helps!

In geometry, a chord, radius, diameter, tangent, secant, and the point of tangency are all parts related to a circle. A radius can also be an axis, a minor arc is the smaller arc between two points on a circle, and a major arc is the larger one. These terms help in understanding the properties and relations of lines to a circle.

In the context of circles in geometry, various terms define specific parts or aspects of a circle. Here's what each term represents:

A chord is a straight line segment whose endpoints both lie on the circle.The radius is a straight line from the center of the circle to any point on the circle. In other cases, it can form an axis which bisects a chord (as per a geometry theorem).A diameter is a chord that passes through the center of the circle, and it is also twice the length of the radius. Two radii forming a straight line constitute a diameter.A tangent is a straight line that touches the circle at just one point, this point is known as the point of tangency. A tangent is perpendicular to the radius drawn to the point of tangency.A secant is a straight line that intersects the circle at two points.

A minor arc is the shortest arc connecting two endpoints on a circle, and a major arc is the longer arc connecting the same two endpoints. The length of an arc is proportional to the size of its associated angle at the center of the circle.

When drawing or labeling the parts of a circle, it's important to note these definitions. For instance, if given a diagram with a point on the circle labeled 'A' and the center labeled 'O', the segment OA would be a radius. If there's a straight line that touches the circle at point A and doesn't cross through it, that would be your tangent, and point A is the point of tangency. Any straight line through A that crosses through another point on the circle, say, point B, would be a secant, and the line OAB (if extended through O) would be a diameter. The arc's size determines if it is a minor or major arc, depending on whether it is more or less than half the circle's circumference.

Sarah deposits $600 in a savings account that pays 2.5% per year. What is the minimum number of years it would take for the amount in her account to be more than $800, provided no more money is deposited in the account?

Answers

Here is the compound interest formula solved for years:
Years = {log(total) -log(Principal)} ÷ log(1 + rate)
Years = {log(800) - log(600)} ÷ log(1.025)
Years = {2.903089987 -2.7781512504} / 0.010723865392
Years = { 0.1249387366 } / 0.010723865392
Years = 11.6505319708
That's how many years it takes for the $600 to become exactly $800.00
The question specifically asks how long for the money to be MORE than $800.00?

So, if we enter 800.01 into the equation, then the answer is
Years = {log(800.01) - log(600)} ÷ log(1.025)
Years = {2.9030954156 -2.7781512504} / 0.010723865392
Years = 0.1249441652 / 0.010723865392
Years = 11.6510381875
 












It will take at least 12 years for Sarah's $600 deposit at a 2.5% annual interest rate to grow to more than $800, assuming the interest is compounded annually.

To determine how long it will take for Sarah's $600 deposit at a 2.5% annual interest rate to grow to over $800, we can use the formula for compound interest: [tex]A = P(1 + r/n)^{(nt)[/tex], where:

A is the amount of money accumulated after n years, including interest.P is the principal amount (the initial amount of money).r is the annual interest rate (decimal).n is the number of times that interest is compounded per year.t is the time the money is invested for in years.

Since the problem doesn't specify the compounding frequency, let's assume it's compounded annually for simplicity:
[tex]A = 600(1 + 0.025)^t[/tex]. We need A to be greater than $800.

To find the minimum number of years (t), we solve for t:

[tex]800 < 600(1 + 0.025)^t[/tex]

Solving for t gives us: t > ln(800/600) / ln(1.025).

Using a calculator, we find that t > 11.89.

Therefore, it will take at least 12 years for the amount in Sarah's account to exceed $800.

HELP ASAP PLEASE!!!!

Answers

for this problem the steps are below

recall pythagorean theorem
[tex]a {}^{2} + b {}^{2} = c {}^{2} [/tex]
where and and b are the legs of the right triangle and c is the hypotenuse

[tex]4 {}^{2} + 4 {}^{2} = d {}^{2} [/tex]
apply Pythagorean theorem
[tex] \sqrt{16 + 16 } = d[/tex]
square each 4 and take the square root of both sides
[tex] \sqrt{32} = d[/tex]
simplify

reduce the radical
FINAL ANSWER
[tex]4 \sqrt{2} = d[/tex]

or you can simply see that it's a 45 45 90 triangle and know that the hypotenuse d equal one of the legs times the square root of 2

For customers purchasing a refrigerator at a certain appliance store, let A be the event that the refrigerator was manufactured in the U.S., B be the event that the refrigerator had an icemaker, and C be the event that the customer purchased an extended warranty. Relevant probabilities are below.
P(A) = 0.80 P(B | A) = 0.94 P(B | A' ) = 0.79
P(C | A ∩ B) = 0.76 P(C | A ∩ B' ) = 0.56
P(C | A' ∩ B) = 0.68 P(C | A' ∩ B' ) = 0.33

(c) Compute P(B ∩ C).,

Answers

The answers are the following:
P(A)=0.75
P(B|A)=0.9
P(B|A′)=0.8
P(C|A∩B)=0.8
P(C|A∩B′)=0.6
P(C|A′∩B)=0.7
P(C|A′∩B′)=0.3

Removing which point from the coordinate plane would make the graph a function of x?

(–4, 3)
(–2, 1)
(0, 4)
(1, 1)

Answers

(-2,1) X can't repeat
The answer is B. have a great day :)

PLEASE HELP ASAP

Find a solution of the linear inequality.
7>(or equal to)4x-5

(3, 4)

(1, 1)

(3, 0)

(2, 1)

Answers

(1,1) please mark as brainliest

The height of a cone is equal to the diameter of the base. What expression represents the volume of the cone, in cubic units?

Answers

By definition, the volume of a cone is given by:
 [tex]V = (1/3) * (\pi) * (r ^ 2) * (h) [/tex]
 Where,
 r: radius of the circular base
 h: height of the cone
 Let's define a variable:
 x: diameter of the base
 We have then that the radio is:
 [tex] r = x / 2 [/tex]
 The height is:
 [tex] h = x [/tex]
 Substituting values:
 [tex]V = (1/3) * (\pi) * ((x / 2) ^ 2) * (x) [/tex]
 Rewriting:
 [tex]V = (1/3) * (\pi) * (x ^ 2/4) * (x) V = (1/12) * (\pi) * (x ^ 3)[/tex]
 Answer:
 
An expression that represents the volume of the cone, in cubic units is:
 
[tex]V = (1/12) * (\pi) * (x ^ 3)[/tex]

In your notebook, draw a right angle and then draw a bisector of the right angle. Label all parts. What are some properties of the angles formed by the bisector?

Answers

hope this helps you with what you were looking for

Answer:

Let's consider this right triangle described in the picture.

∠ABD = ∠CBD, since BD is a bisector.

Angles ∠ADB and ∠BDC are neighbor angles and their sum is equal to 180°.

∠BDC is an exterior angle and ∠BDC=∠ABD+∠ADB.

Similarly, ∠ADB is an exterior angle and ∠ADB=∠CBD+∠BCD

Step-by-step explanation:

So I tried to answer this the best that I can but I keep getting wrong answers can someone help me I will award brainliest .

Answers

Hello,

[tex]2*\sqrt{3}*\dfrac{cos(x)}{sin(x)}+4*cos(x)- \dfrac{3}{sin(x)} +2*\sqrt{3}\\ =2*cos(x)*(\dfrac{\sqrt{3}}{sin(x)}+2)-\sqrt{3}(\dfrac{\sqrt{3}}{sin(x)}+2)\\ =(\dfrac{\sqrt{3}}{sin(x)}+2)*(2*cos(x)-\sqrt{3})\\\\ cos(x)=\dfrac{\sqrt{3}}{2} -\ \textgreater \ x=\dfrac{\pi}{6}\ or\ x=\dfrac{11*\pi}{6}\\ or\\ \dfrac{\sqrt{3}}{sin(x)}+2=0-\ \textgreater \ sin(x)=-\dfrac{\sqrt{3}}{2}-\ \textgreater \ x=\dfrac{5*\pi}{3}\ or\ x=\dfrac{4*\pi}{3}\\\\ [/tex]

WILL GIVE BRAINLIEST, 15 points-The daily number of patients visiting a dentist's office during one week are 8, 41, 35, 39, 36, and 42.

Which statement is true?




The mean, median, and mode are all appropriate measures of center.

Both the mean and median are appropriate measures of center.

The median is the only appropriate measure of center.

Both the median and mode are appropriate measures of center.

Answers

we know that
Mean and median both try to measure the central tendency in a data set.The mean is commonly used, but sometimes the median is preferred.
Mode is the element which occurs the most times in the set

therefore
the answer is the option 
Both the mean and median are appropriate measures of center.

Answer: The median is the only appropriate measure of center.

Step-by-step explanation:

The statement is ''Both the median and mode are appropriate measures of center''. Actually, the three, that is, the mean, media and mode can be used to measure the central of tendency. But the MEAN has a problem, it can be Skewed by large values in the distribution/data. Assuming, the days of the week when patients visiting a dentist's office are;

Monday: 8, Tuesday: 41, Wednesday: 35, Thursday: 39, Friday: 36, and Saturday: 42.

And the mean of the distribution = 33.5. Most patients visit the dentist Tuesday to Saturday, where Saturday is the highest. The data is skewed. So, the MEDIAN will do the job perfectly.

For the mode; since we do not have; (1). two highest mode with the same value in the data provided and, (2). the highest value and the second to the highest values are not too far from each other. We can use the MODE here for measuring the central tendency.

===> CONCLUSION: (1). Assuming the data fails the two condition for mode, the most correct statement will be ''The median is the only appropriate measure of center".

===> (2). Also, for this data, the MEDIAN will be the only appropriate measure of center.

Find the volume of the composite space figure to the nearest whole number.

Answers

Answer:

The volume is 180 cube cm.

Step-by-step explanation:

By the given diagram,

The composite figure is made by the two cuboids,

First having dimensions, 2 cm × 5 cm × 6 cm,

And second having dimensions, 8 cm × 5 cm × 3 cm,

So, the volume of the given composite figure = the volume of first cuboid + the volume of second cuboid

= 2 × 5 × 6 + 8 × 5 × 3,

= 60 + 120

= 180 cube cm

The volume of the composite space figure to the nearest whole number is: 180 cube cm.

Here, we have,

from the given information, we get,

By the given diagram,

The composite figure is made by the two cuboids,

First having dimensions, 2 cm × 5 cm × 6 cm,

And second having dimensions, 8 cm × 5 cm × 3 cm,

So, the volume of the given composite figure

= the volume of first cuboid + the volume of second cuboid

= 2 × 5 × 6 + 8 × 5 × 3,

= 60 + 120

= 180 cube cm

Hence, the volume of the composite space figure to the nearest whole number is: 180 cube cm.

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Abe has a coupon for $3.50 off a pack of 24 water bottles. The regular price of this pack is $21.98. Is Abe uses his coupon what is the price per bottle.

Answers

$0.77 cents is the answer bruh

The price per bottle would be $0.77. This can be found by subracting $3.50 from $21.98 to get $18.48. Then you divide $18.48 by 24 to get the answer.

What is the equation of the line passing through the points (2, –1) and (5, –10) in slope-intercept form?

y=-3x-5


y=-3x+5

y=3x-5
y=3x+5,

Answers

here is the picture
as you see the line crosses Y-axis on point 5 so the intercept is +5
nowyou can put (2,-1)as x and y to find the slope
[tex] - 1 = 2a + 5 \\ - 1 - 5 = 2a \\ - 6 = 2a \\ a = \frac{ - 6}{2} = - 3[/tex]
the slope is -3
so the correct equation will be
y=-3x+5

The equation of line passes through the points (2, -1) and (5, -10) will be;

⇒ y = - 3x + 5

What is Equation of line?

The equation of line in point-slope form passing through the points

(x₁ , y₁) and (x₂, y₂) with slope m is defined as;

⇒ y - y₁ = m (x - x₁)

Where, m = (y₂ - y₁) / (x₂ - x₁)

Given that;

Two points on the line are (2, -1) and (5, -10)

Now,

Since, The equation of line passes through the points (2, -1) and (5, -10)

So, We need to find the slope of the line.

Hence, Slope of the line is,

m = (y₂ - y₁) / (x₂ - x₁)

m = (- 10 - (-1)) / (5 - 2)

m = - 9 / 3

m = - 3

Thus, The equation of line with slope - 3 is,

⇒ y - (-1)= - 3 (x - 2)

⇒ y + 1 = - 3x + 6

⇒ y = - 3x + 6 - 1

⇒ y = - 3x + 5

Therefore, The equation of line passes through the points (2, -1) and

(5, -10) will be;

⇒ y = - 3x + 5

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What is the measure of R to the nearest degree?

Answers

R measures 42.8 degrees, which is around average.

What are the properties of Triangle?

The properties of the triangle are:

1. The sum of all the angles of a triangle (of all types) is equal to 180°.

2. The sum of the length of the two sides of a triangle is greater than the length of the third side.

3. In the same way, the difference between the two sides of a triangle is less than the length of the third side.

The sine rule states that for a triangle with sides a, b, and c opposite to angles A, B, and C respectively,

a/sinA = b/sinB = c/sinC

Using this rule, we can find the measure of angle R as follows:

a = ST = 30

b = RT = 35

c = RS

Let angle R be opposite to side b.

sinR/sinS = b/c

sinR/sin69 = 35/c

c = 35/sin69 x sinR

Now we can use the sine rule to find c:

a/sinA = b/sinB = c/sinC

30/sin69 = 35/sinR = c/sin42

c = 35/sinR x sin42

Equating the two expressions for c, we get:

35/sin69 x sinR = 35/sinR x sin42

Simplifying this equation, we get:

sinR/sin69 = sin42

sinR = sin69 x sin42

sinR = 0.672

Taking the inverse sine of both sides, we get:

R = sin^{-1}(0.672)

R ≈ 42.8 degrees

Therefore, the measure of angle R is approximately 42.8 degrees.

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find the range of the function f(x)=4x-1 for the domain {-1,0,1,2,3}
how do I do this?

Answers

The range of the function is your extent of y values. The range will be the highest and lowest functions of y.
Plug in all the values of the domain, which are x, into the equation for x. If you plug in those values you will get {-5, -1, 3, 7, 11} so the range will be (-5, 11).
Domain is the set of x-values and range is the set of y-values. 
So, to find the range, substitute each value of the domain in the given function f(x)=4x-1
 Domain is {-1,0,1,2,3} 
 When x=-1, f(x)= 4(-1)-1 =-4-1 = -5
 When x=0, f(x)=4(0)-1 = 0-1 =-1
 When x=1, f(x) = 4(1)-1 = 4-1 = 3
 When x=2, f(x) = 4(2)-1 =8-1 =7
 When x=3, f(x) = 4(3) -1 =12-1 = 11
 Therefore the range is {-5,-1,3,7,11}

1000p for an answer please

Answers

Well, it asks that you evaluate 24 for y.
Also, notice that it says "the difference of a number and 6"
So your equation should have been
y - 6

And after evaluating
24 - 6 

Then solve 
24 - 6 = 18
18 should have been the answer

So no, the student's work is not correct, because the student wrote a division expression instead of a subtraction equation

a 12-ft-long ladder is leaning against a wall and makes an 80 degree angle with the ground.how high up the wall does the ladder reach, and how far is the base of the ladder from the base of the wall? round to the nearest inch.,

Answers

Height of ladder = sin80 x h = 11 feet 10 inches Base of ladder to wall = cos80 x h = 2 feet 1 inch

Answer:

The ladder reaches 142 inches and the base of ladder is 25 inches far from the base of the wall.

Step-by-step explanation:

Let us draw a diagram for the given situation.

In the attached figure,

AB = the height of wall where the ladder reaches

AC = ladder

BC = distance of base of ladder from the base of the wall

In triangle ABC,

[tex]\sin C=\frac{AB}{AC}\\\\\sin80=\frac{AB}{12}\\\\AB=12\sin80\\\\AB=11.82[/tex]

And

[tex]\cos C=\frac{BC}{AC}\\\\\cos80=\frac{BC}{12}\\\\BC=12\cos80\\\\BC=2.08[/tex]

Now, 1 feet = 12 inches

Hence, 11.82 ft = 141.84 inches

and 2.08 feet = 24.96 inches

Therefore, in the nearest inches, we have

The ladder reaches 142 inches and the base of ladder is 25 inches far from the base of the wall.

helppppppppppppppppp

Answers

See the attached graphic.
X is negative and Y is positive so it is Quadrant 2 (or Quadrant II)

1.
(05.08 MC)
Given the equation 1 over x−1 + 2 over x =x over x−1



Part A: What values of x that would make the equation no solution? Why?

Part B: What is the solution of the equation. Show all of your steps.







Max and Maggie have to clean the house. It takes Max 10 hours to clean the house, while Maggie can complete the task in 6 hours. How long will it take for them to work together? Explain each step in solving this equation.

Answers

Part A)  x cannot be 1 or 0, because that would lead do division by 0.  If x=1, 1-1=0.  If x=0, then we have straight division by 0.

Part B)  x=2 or x=1.

Together they could clean the house in 3.75 hours.

Explanation:

Part A is explained with the answer.
Part B)
[tex]\frac{1}{x-1}+\frac{2}{x}=\frac{x}{x-1}[/tex]
We will first multiply each term by (x-1) to cancel those denominators:
[tex]\frac{1}{x-1} \times \frac{x-1}{1}+\frac{2}{x} \times \frac{x-1}{1}=\frac{x}{x-1} \times \frac{x-1}{1} \\ \\ \frac{x-1}{x-1}+\frac{2(x-1)}{x}=\frac{x(x-1)}{x-1} \\ \\ 1+\frac{2(x-1)}{x}=x[/tex]

Now we multiply everything by x to cancel that denominator:
[tex]1(x)+\frac{2(x-1)(x)}{x}=x(x) \\ \\x+2(x-1)=x^2 \\ \\x+2*x-2*1=x^2 \\x+2x-2=x^2 \\3x-2=x^2[/tex]

We want all of the variables to be on the same side of the equation, so subtract 3x from both sides:
3x-2-3x=x²-3x
-2=x²-3x

To solve quadratics, we set them equal to 0.  Add 2 to both sides to make this happen:
-2+2=x²-3x+2
0=x²-3x+2

To solve this by factoring, we want factors of 2 that sum to -3.  -2(-1)=2 and -2+-1=-3:
0=(x-2)(x-1)

The zero product property tells us that either x-2=0 or x-1=0; therefore x=2 or x=1.

Max cleans 1/10 of the house in an hour, since it takes him 10 hours to clean the whole house.  Maggie cleans 1/6 of the house in an hour, since it takes her 6 hours to clean the whole house.  Our equation is then:

1/10x+1/6x=1 (one whole, since it is one house; x is the number of hours)

Find a common denominator.  60 is the first thing that 10 and 6 both evenly divide into:
6/60x+10/60x=1
16/60x = 1

Divide both sides by 16/60:

16/60x ÷ 16/60 = 1 ÷ 16/60
x = 1/1 ÷ 16/60
x = 1/1 ×60/16
x = 60/16 = 3.75.

Answer:

a

Step-by-step explanation:

Identify the polynomial. x 3 y 3 monomial binomial trinomial

Answers

I believe binomial since there are 2 monomials being multiplied.

Answer:

x³y³ is monomial.

Step-by-step explanation:

Given :Polynomial  x³y³ .

To find : Identify monomial binomial trinomial.

Solution : We have given that

Polynomial  x³y³ .

Monomial : A polynomial with just one term.

Examples : 1) 3xy

2) 5y²x³  Both are monmial .

x³y³ is also a monomial because it has only one term.

Therefore,  x³y³ is monomial.

Spray from a lawn sprinkler makes a circle 40 feet and radius what are the approximate diameter circumference and area of the circle of the lawn watered

Answers

251.3 ft. I am in 5th grade and I know this.

The approximate diameter of the circle is 80 feet, the circumference is approximately 251.327 feet, and the area is approximately 5026.548 square feet.

To find the diameter, circumference, and area of the circle watered by the lawn sprinkler, we can use the formulas:

1. **Diameter [tex](\(d\)) = \(2 \times \text{radius}\)[/tex]

2. **Circumference [tex](\(C\)) = \(2 \times \pi \times \text{radius}\)[/tex]

3. **Area [tex](\(A\)) = \(\pi \times \text{radius}^2\)[/tex]

Given:

Radius[tex](\(r\)) = 40 feet[/tex]

1. Diameter:

[tex]\[d = 2 \times r\]\[d = 2 \times 40 \text{ feet}\]\[d = 80 \text{ feet}\][/tex]

2. Circumference:

[tex]\[C = 2 \times \pi \times r\]\[C = 2 \times \pi \times 40 \text{ feet}\]\[C \approx 2 \times 3.14159 \times 40 \text{ feet}\]\[C \approx 251.327 \text{ feet}\][/tex]

3. Area:

[tex]\[A = \pi \times r^2\]\[A = 3.14159 \times 40^2 \text{ square feet}\]\[A = 3.14159 \times 1600 \text{ square feet}\]\[A \approx 5026.548 \text{ square feet}\][/tex]

Answer:

The approximate diameter of the circle is 80 feet, the circumference is approximately 251.327 feet, and the area is approximately 5026.548 square feet.

It rained 2/8 inch in one hour. If rained 4/8 inch in the next hour.find the total amount of rain.wrote in simplest form

Answers

2/8+4/8=6/8 = 2/3 I believe if there isn't some hidden text I don't understand...
So just add the fractions together but keep the denominator the same. So now the fraction is 6/8, To simplify just find the greatest common factor which is 2 and divide both the numerator and the denominator by 2. Now the fraction should turn out into 3/4. 

The midpoint of a line segment with end points as (-10, y1) and (-6, 7) is (-8, 6). What is the value of y1?

Midpoint formula is (x1 + x2)/2 , (y1 + y2)/2 but I keep getting a wrong answer.,

Answers

The formulae for the midpoint are correct:

M ( (x₂-x₁)/2 , (y₂-y₁)/2 )

You need to invert these to get x₁ and y₁:
x₁ =2xm - x₂
y₁ =2ym - y₂

Try with the x to prove the formulae are correct:
x₁ =2·(-8) - (-6) = -16 + 6 = -10  which is what we have!

Then, use the other formula for y:
y₁ =2 ·(6) - (7) = 12 - 7 = 5

Therefore y₁ = 5

The points at which the quadratic equation intersects the x-axis are referred too

Answers

we know that

The x coordinates of the points where the graph intersects the x axis would be the solutions or otherwise called zeros of the quadratic equation

y = 2/3 x + 20
when x = 21 PLEASE EXPLAIN FUNCTION AND SOLUTION

Answers

In this problem, you are asked to compute for the value of y when x = 21. The function shows how the value of y changes with the given value of x.

Y = 2/3x + 20

Y = 2/3 (21) + 20

Y = 14 + 20

Y = 34

Answer:

5

Step-by-step explanation:

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Solve the system of linear equations by elimination. 3x−2y=4 3x−2y=4 6x−2y=−2

Answers

x = -2
y = -5

You can get this by multiplying the first equation by -1 and then combining. That will get your y values to cancel out. 

A group consists of five five men and eight eight women. seven seven people are selected to attend a conference.
a. in how many ways can seven seven people be selected from this group of thirteen thirteen​?
b. in how many ways can seven seven women be selected from the eight eight ​women?
c. find the probability that the selected group will consist of all women.

Answers

b)they are selected by the 88 women

a) 116 ways to select seven people.

b) ways to select 7 women.

c) The probability is 0.004662

What is Combination?

Combinations are mathematical operations that count the number of potential configurations for a set of elements when the order of the selection is irrelevant. You can choose the components of combos in any order. Permutations and combinations can be mixed up.

a) Number of ways can seven people be selected from this group of thirteen

C( 13, 7)

= 13! /6! 7!

= ​1716

b) Number of ways seven women selected from  Eight women

C(8 ,7)

= 8!/ 7! 1!

= 8

c) The probability that the selected group will consist of all women

= 8 / 1716

= 0.004662

Learn more about Combination here:

https://brainly.com/question/13387529

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