Nick is solving the equation 3x2=20−7x with the quadratic formula.

Which values could he use for a, b, and c?



a = 3, b = ​−7​ , c = 20

a = 3, b = 7, c = −20

a = 3, b = ​−20​ , c = 7

a = 3, b = 20, c = −7

Let r = range

Range = biggest value minus smallest value

r = 97 - 77

r = 20

Answer:

Range 20

Step-by-step explanation:

First put all the numbers in order from least to greatest

77,79,80,81,83,88,93,94,97,97

To find range you subtract the largest number from the smallest number.

So 97 - 77 = 20

The range is 20

Hope This Helps!! :}

Answer:

[tex]\displaystyle =9[/tex]

Step-by-step explanation:

The slope formula is

[tex]\displaystyle \frac{y_2-y_1}{x_2-x_1}[/tex]

[tex]\displaystyle y_2=7\\\displaystyle y_1=(-2)\\\displaystyle x_2=(-6)\\\displaystyle x_1=(-7)[/tex]

[tex]\frac{7-(-2)}{(-6)-(-7)}=\frac{9}{1}=9[/tex]

Therefore, the slope is 9, and the correct answer is 9.

Hope this helps!

Answer:

A. x-9 and x+9 because these are perfect squares. 9 times -9 is -81. x times x is x^2. 9 + -9 is 0

Answer:

16 possible hair/clothing combinations

Step-by-step explanation:

1) Brown-dress; 2)Brown-jumpsuit; 3)Brown-pajamas ; 4)Brown-Jeans; 5)Black-Dress; 6)black jumpsuit; 7)black pajamas; 8)black jeans; 9)blonde dress; 10)blond jumpsuit; 11)blonde pajamas; 12)blond jeans; 13)red dress; 14)red jumpsuit; 15)red pajamas; 16)red jeans

Or just multiply 4x4 because there were four of each.

Answer:

4

because if you cross off one number at a time from each side you are left with 2 number 4s and 4+4/2=4

Solving for x:

Start by distributing the numbers outside the parentheses to inside the parentheses:

-1 + 7x + 42 + 6x = 36

Now combine like (similar) terms:

13x + 41 = 36

Subtract 41 from both sides:

13x = -5

Divide both sides by 13:

x = [tex]-\frac{5}{13}[/tex]

Therefore, x = [tex]-\frac{5}{13}[/tex].

Hope this helps! :)

The store wants to make a 20% profit:

Multiply the cost of the toy by 1.20 ( cost plus 20%).

6.25 x 1.20 = $7.50

This means when the toy is sold at 25% off, it needs to be $7.50 to make the 20% profit.

When the item is 25% off, that means it would sell for 75% of the original price.

Now to find what the price needs to be before the 25% off divide the profit price by 75%

7.50 / 0.75 = $10

K = $10

Final answer:

To find the price at which the toy should be sold to maintain a 20% profit after a 25% discount, use the cost price and profit margin to calculate the selling price.

Explanation:

To compute the price at which the toy should be priced at a 25% discount and still make a profit of 20%, follow these steps:

Calculate the cost price after a 20% profit margin: $6.25 + 0.20 * $6.25 = $7.50

Set up the equation: $7.50 = (100% - 25%) * $k

Solve for k: $k = $7.50 / 0.75 = $10

Answer:

y = - 3x + 3

Step-by-step explanation:

Assuming you require the equation of the line

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = - 3 and c = 3, hence

y = - 3x + 3 ← equation of line

Hey there!

What I am assuming you are looking to do is convert this into a linear equation. I will guide you on how to do just that.

The linear equation form is:

y = mx + b

Note in particular m represents the slope and b represents the y-intercept.

Our answer would be y = -3x + 3

Answer:

no

Step-by-step explanation:

Answer:

Step-by-step explanation:

depending on the space you're considering, it would be SOMETIMES true. But usually, the 2 lines would be parralel.

What i'm saying is, that in an euclidian space, the 2 lines would be parallel. In another kind of space, the two lines could be anything...

for example: look at how longitude and lattitude are represented on a globe : they are "lines"... 2 sets of perpendicular lines...

Now look at what happens in the poles : all lines intersect! (therefore, they're not parallel, and not necessarily perpendicular either)

for a vertically opening parabola, its axis of symmetry will come from the x-coordinate of its vertex, thus

[tex]\bf \textit{vertex of a vertical parabola, using coefficients} \\\\ y=\stackrel{\stackrel{a}{\downarrow }}{1}x^2\stackrel{\stackrel{b}{\downarrow }}{-6}x\stackrel{\stackrel{c}{\downarrow }}{-7} \qquad \qquad \left(-\cfrac{ b}{2 a}~~~~ ,~~~~ c-\cfrac{ b^2}{4 a}\right) \\\\\\ \left( -\cfrac{-6}{2(1)}~~,~~-7-\cfrac{(-6)^2}{4(1)} \right)\implies (3~~,~~-7-9)\implies (3~~,~~-16) \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill \stackrel{\textit{axis of symmetry}}{x=3}~\hfill[/tex]

That's true: if a triangle has two congruent angles, then it's an isosceles triangle.

An isosceles triangle has two congruent sides, which are opposite to the congruent angles, and a base, which is the side opposite to the non-congruent angle.

Answer:

The correct answer would be true.  Reversing the statement clause and inserting a "not" in a if- then statement will also make the new statement true. For example, "If I eat this, then give me five dollars". The reverse would be " If I do not eat this, then do not give me five dollars". Both sentences mean the same.

Step-by-step explanation:

Answer:

its true

Step-by-step explanation:

Step-by-step explanation:

Let's say x is the length of the first piece.

The second piece is 2x.

The third piece is 2x.

So the total length is:

x + 2x + 2x = 279

5x = 279

x = 55.8

That means 2x = 111.6.

So the first piece is 55.8 feet, the second piece is 111.6 feet, and the third piece is also 111.6 feet.

Answer:

Piece 1 : 55.8 ft

Piece 2: 111.6 ft

piece 3: 111.6 ft

Step-by-step explanation:

From the question we can see that the total length of the rope is 279 ft and as mentioned it is cut into three pieces. Since the first piece has no length we can give it a variable of x . Piece two is twice as long as piece one, so we can give it a value of 2x . Lastly, piece three is the same as piece two, so it would also be 2x.

So we can now say the following:

[tex]x + 2x + 2x = 279ft[/tex]  .... now we can solve for x.

[tex]5x = 279[/tex]

[tex]x = 55.8 ft[/tex]

So we can see that piece one is 55.8 ft long . Now we can use this value to find pieces two and three.

[tex]2x = P2[/tex]

[tex]2(55.8) = P2[/tex]

[tex]111.6 = P2[/tex]

So pieces two and three are 111.6 ft long

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

Answer:

B = 135

A = 60

C = 75

Hope this helps

Answer:

∠B = 135°

∠A = 60°

∠C = 75°

Step-by-step explanation:

Since, Straight Line PQ always has angle 180°

∴ ∠PBS = 180 - ∠ABC

             = 180° - 45° = 135° = ∠B

Since, ∠RAS and ∠BAC are vertically opposite to each other.

So, ∠RAS = ∠BAC

Also ∠RAS = 60°

∴ ∠BAC = 60° = ∠A

The straight line ∠PCQ always has angle 180°.

∴ ∠PCR = 180 - ∠RCQ

⇒ ∠PCR = 180 - 105° = 75° = ∠C

Answer:

165.347 pounds ..

Step-by-step explanation:

The weight of patient is given in kilograms which is

W = 75 kilo grams.

In order to convert the weight into pounds we have to multiply or divide 75 with some number.

There are 2.20462 pounds approximately in one kilogram.

So the weight in pounds will be:

Weight in pounds = 75 * 2.20462

= 165.3465 pounds

= 165.347 pounds ..

Answer:

Step-by-step explanation:

[tex]2x^2+6x-10=x^2+6\qquad\text{subtract}\ x^2\ \text{and 6 from both sides}\\\\x^2+6x-16=0\\\\x^2+2x-8x-16=0\\\\x(x+2)-8(x+2)=0\\\\(x+2)(x-8)=0\iff x+2=0\ \vee\ x-8=0\\\\x+2=0\qquad\text{subtract 2 from both sides}\\x=-2\\\\x-8=0\qquad\text{add 8 to both sides}\\x=8[/tex]

Answer:

2 and -8

Explanation is Apex

Answer:

5

Step-by-step explanation:

Evaluate (h + k)(x) then substitute x = 2 into the result

(h + k)(x) = h(x) + k(x)

h(x) + k(x) = x² + 1 + x - 2 = x² + x - 1, thus

(h + k)(2) = 2² + 2 - 1 = 4 + 2 - 1 = 5

To find the value of (h + k)(2), substitute x = 2 into h(x) and k(x) and then add the results. The result is 5.

To find the value of (h + k)(2), we first need to find the values of h(2) and k(2). To find h(2), we substitute x = 2 into the function h(x) = x² + 1. h(2) = (2)² + 1 = 4 + 1 = 5. Next, to find k(2), we substitute x = 2 into the function k(x) = x - 2. k(2) = 2 - 2 = 0. Now, we can find (h + k)(2) by adding the values of h(2) and k(2). (h + k)(2) = h(2) + k(2) = 5 + 0 = 5.

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Answer:

55, -150, -78

Step-by-step explanation:

The given inequality is:

[tex]11>\frac{a}{4}-16[/tex]

Adding 16 to both sides, we get:

[tex]11+16>\frac{a}{4}-16+16\\\\ 27>\frac{a}{4}[/tex]

Multiplying both sides by 4, we get:

[tex]27 \times {4}>\frac{a}{4} \times 4\\\\ 108>a[/tex]

Hence, the solution to the inequality is 108 > a or this can be written as a < 108

This means, the values less than 108 are a solution of the given inequality. 108 is not a part of the solution as the inequality symbol says less than 108.

Among the given options following are the values that are less than 108 and thus will satisfy the inequality:

55, -150, -78

Answer:

420°

Step-by-step explanation:

To convert from radian to degree measure

degree measure = radian measure × [tex]\frac{180}{\pi }[/tex]

Hence

degree = [tex]\frac{7\pi }{3}[/tex] × [tex]\frac{180}{\pi }[/tex]

Cancel π on numerator/ denominator

= [tex]\frac{7(180)}{3}[/tex] = 420°

To convert 7π/3 radians to degrees, multiply by the conversion factor 180°/π to get 420°.

To convert the radian measure to degrees, we can use the conversion factor that 1 radian is equivalent to 57.3°.

Given the radian measure 7π/3, we multiply this by the conversion factor to find the degree measure.

The conversion is as follows:

7π/3 radians × (180°/π) = 7×180°/3 = 420°.

Therefore, 7π/3 radians is equivalent to 420° when converted to degrees.

Answer:

t[c(h)] = 700h

Step-by-step explanation:

Got it wrong, and it told me what was right lol

The function is given by:

                            t[c(h)] = 700h

Emma burns 350 calories per hour biking.

The function is given by:

                 c(h) = 350h.

Also, when her little sister tow in the bike then the she  burn twice as many calories.

This could be represented by the function:

                             t(c) = 2c

where c is the number of calories burned per hour.

Now, we are asked to find the function that calculate he number of calories she will burn per hour while biking with her sister in the bike trailer i.e. we are asked to find the composition function:

[tex]t(c(h))[/tex]

Hence, we have:

[tex]t(c(h))=t(350h)\\\\i.e.\\\\t(c(h))=2(350h)\\\\i.e.\\\\t(c(h))=700h[/tex]

Answer:

B 0.55

Step-by-step explanation:

the student is a sophomore - so youre looking at the sophomore row, 77 sophomores total

the student attended the volleyball game - 42 sophomores attended the game

42 / 77 students total = about 0.55

Option: B is the correct answer.

              B.   0.55

Let A denote the event that the student is a sophomore.

and B denote the event that the student attend the volleyball game.

and A∩B denote the event that the student is a sophomore and attend volleyball game.

Let P denote the probability of an event.

We are asked to find the probability : P(B|A)

We know that:

[tex]P(B|A)=\dfrac{P(A\bigcap B)}{P(A)}[/tex]

Based on the table provided to us we have:

[tex]P(A)=\dfrac{77}{137}[/tex]

and

[tex]P(A\bigcap B)=\dfrac{42}{137}[/tex]

Hence, we have:

[tex]P(B|A)=\dfrac{\dfrac{42}{137}}{\dfrac{77}{137}}[/tex]

i.e.

[tex]P(B|A)=\dfrac{42}{77}=0.55[/tex]

Answer:

x=(2/5) or x=0.4

Step-by-step explanation:

3x+5=7-2x

3x=2-2x

5x=2

x=(2/5) or x=0.4

Answer:

14 days

Step-by-step explanation:

1. Convert the amount of work person A and B can do respectively in one day into fractions.

                                        A = 1/16                  B = 1/12

2. Get both fractions to a common denominator using the least common multiple. This is 48.

                                1/16 × 3 = 3/48        1/12 × 4 = 4/48

3. Add both fractions to find out how much work will be done in two days.  We are doing this because we are working in a pattern, and this will allow us to multiply, which is more time efficient than repeatedly adding 3 and then 4.

                                               3/48 + 4/48 = 7/48

4. Figure out how many sets of two days work (7/48) will get them to 48/48 (100% done) or closest to it without being under. This would be 7 sets.

                                               7/48 × 7 = 49/48

5. Multiply 7 by 2. We are doing this because we worked in sets of two days to account for A working and then B, since they are taking turns.

                                                    7 × 2 = 14

6. It will take them 14 days.

Answer:

45

Step-by-step explanation:

Um, If we say that all the numbers are 44, and now we add 50, then we will get 270. Find the mean of 270. We get 45.

Final answer:

To find the new average after adding 50 to a set of 5 numbers with an average of 44, multiply the average by the number of elements, add the new number, then divide by the total number of elements to get the new average of 45.

Explanation:

The average of a set of 5 numbers is 44. To find the sum of the original set, multiply the average by the number of elements: 44 x 5 = 220. When 50 is added, there are now 6 numbers in the set. To find the new average, divide the new sum (220 + 50 = 270) by the total number of elements (6) to get 45 as the new average.

Answer:

100>=500-15x

Step-by-step explanation:

He needs at least 100, so it's greater than OR equal to 100. He starts with 500 and goes down 15 each week. The x stands for the amount of weeks that are in the school year. Sorry for the terrible formatting on the greater than or equal to.

To write an inequality representing Daniel's lunch account scenario, where he begins with $500 and must have at least $100 by year-end despite spending $15 weekly, the inequality would be: 500 - 15x >= 100.

The question involves writing an inequality to represent the condition where Daniel must have at least $100 in his school lunch account by the end of the school year, given he starts with $500 and spends $15 each week on lunches. To frame the inequality, let's denote the number of weeks Daniel buys lunch as x. Given he spends $15 per week, the total expenditure over x weeks will be $15x. Initially having $500 and requiring at least $100 by the end of the school year, the inequality will be:

500 - 15x ≥ 100.

This inequality states that even after spending $15 each week for x weeks, Daniel must have at least $100 remaining in his account. To find how many weeks he can afford to buy lunch while meeting this requirement, one would solve for x in the inequality.

Answer:

6 square units (rounded to nearest whole number)

Step-by-step explanation:

Area of triangle is found by the formula 1/2 * base * height

But we can't easily figure this out using this formula, instead we use another formula for area of a triangle:

[tex]A=\frac{1}{2}abSinC[/tex]

Where

A is the area

a and b are the two side given (3 and 5 in our case)

C is the angle between a and b (53 degrees given)

We can substitute into the formula and figure out:

[tex]A=\frac{1}{2}abSinC\\A=\frac{1}{2}(3)(5)Sin53\\A=5.99[/tex]

The area is 5.99, to the nearest whole number, the area is 6

Answer:

[tex]y = - \frac{3}{20} {x}^{2} [/tex]

Step-by-step explanation:

The given parabola has focus at:

[tex](0, - \frac{5}{3} )[/tex]

and directrix at

[tex]y = \frac{5}{3} [/tex]

This is a vertical parabola that opens downwards.

The equation is of the form;

[tex] {x}^{2} = - 4py[/tex]

p is the distance from the vertex to the directrix.

Since the vertex is at the origin, we have

[tex]p = \frac{5}{3} [/tex]

We plug this value into the equation to get:

[tex] {x}^{2} = - 4( \frac{5}{3} )y[/tex]

[tex] {x}^{2} = - \frac{20}{3} y[/tex]

We solve for y to obtain:

[tex]y = - \frac{3}{20} {x}^{2} [/tex]

The 3rd option is correct.

130% as a decimal is 1.3

Divide 69 by 1.3:

69 /1.3 = 53.076923

Round the answer as needed

To find the original number that increased by 130% equals 69, we divide 69 by 2.30, which reveals that the original number is 30.

The student is asking how to find a number that, when increased by 130%, results in 69. To solve this problem, let's represent the original number as x. The increase by 130% of the original number would be x + 1.30x (which equals 2.30x), and this sum is equal to 69. To find x, we divide 69 by 2.30:

x = 69 / 2.30

We calculate this as:

x = 30

Therefore, the number which when increased by 130% equals 69 is 30.

Answer:

Correct answer is f(x) = (625^x)^1/4

Step-by-step explanation:

We know that

625 = 5^4

This means

f(x) = (625^x)^1/4

f(x) = (5^(4x))^1/4

But we know this is equivalent to

f(x) = (5^(4x*(1/4))) =

= 5^(x)

Correct answer is f(x) = (625^x)^1/4