Answer:
(2.4, -1.2)
Step-by-step explanation:
Start by moving the x and the y to the same side and moving the number across the equal sign in both equations. We should now have y-0.45x=-2.3 and 2y+4.2x=7.8. We can use the elimination method by multiplying the first equation by -2 to get -2y+0.9x=4.6 and 2y+4.2x=7.8. From there, add the two equations together, eliminating y (-2+2=0). We now have 5.1x=12.4; divide both sides by 5.1 to get x=2.4. Then, in any of the two equations, let's use y-0.45x=-2.3, substitute x with 2.4. Now we have y-1.08=-2.3. Add 1.08 to both sides to get y=-1.22; round that to the nearest tenth to get -1.2.
Ms Davis says that you can use the area of a a circle to figure out its circumference,but a student disagreed.Who is correct?Use Area= 78.5m to solve the problem and then explain with a paragraph who is correct?
Answer:
The student is correct.
Step-by-step explanation:The circle's circumference is the distance around the circle. To find out the circle's circumference, you will NEED the radius. Without the radius OR diameter, there will be no way of telling what the circumference is with just the area.
PLS HELP!!!!Pre-Cal
1. Find the equation of a parabola with vertex (2, -1), opens upward and has focal width of 16.
2. Find the equation of a parabola with focus (2, -3) and directrix x = 5.
The equation of the first parabola with vertex (2, -1), opens upward with a focal width of 16 is (x-2)² = 16*(y+1). The equation of the second parabola with a focus (2, -3) and directrix x = 5 is (x-2)² = -24*(y-5).
Explanation:1. For a parabola that opens upward with vertex (h, k) and focal width 4p, the equation is given by: (x-h)² = 4p*(y-k). Given the vertex (2, -1) and focal width of 16, we can deduce that 4p = 16, so p = 4. Plug these values into the formula to get the equation of the parabola: (x-2)² = 16*(y+1).
2. For a parabola with a focus (h, p) and directrix x=d, the equation is (x-h)² = 4p*(y-d). Given the focus (2, -3) and directrix x = 5, meaning h = 2, p = -3, and d = 5. This gives us the equation of the parabola: (x-2)² = -24*(y-5).
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The equation of the first parabola described is (y+1) = (x-2)^2. The equation of the second parabola, given the focus at (2,-3) and the directrix at x = 5, is (x-2) = -(1/12)(y+3)^2.
Explanation:1. The standard form of a parabola that opens upward or downward is (y-k)=(1/4p)(x-h)^2, where (h,k) is the vertex and p is the distance from the vertex to the focus. In this case, h is 2, k is -1 and the focal width is 4p which is given as 16. So p = 16/4 = 4. So, the equation of the parabola is (y+1) = (x-2)^2.
2. The standard form of a parabola that opens to the right or to the left is (x-h)= (1/4p)(y-k)^2. In this case, the focus is (2,-3) and the directrix is x=5. From these, we know h=2, and since the directrix is to the right of the focus, p=h-5 is negative, so p=2-5=-3. The vertex of the parabola is thus (2,-3). So, the equation of the parabola is "(x-2) = -(1/12)(y+3)^2".
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In the diagram, the measure of angle 9 is 85°.
Which angle must also measure 85°?
Angle2
Angle5
Angle11
Angle12
Answer:
angle 5
Step-by-step explanation:
The diameter of a circle is 58 feet. What is the circle's circumference?
Use 3.14 for .
Answer:
182.12
Step-by-step explanation:
2πr , then substitute the numbers
Answer:
182.12ft
Step-by-step explanation:
Just remember to divide the diameter by two to get the radius.
58/2 = 29
C=2 π r
C = 2 * 3.14 * 29= 182.12ft
Find the rule of f(2)
Answer:
f(2) = - 16
Step-by-step explanation:
Given
f(x) = - [tex](4)^{x}[/tex]
To evaluate f(2) substitute x = 2 into f(x)
f(2) = - [tex](4)^{2}[/tex] = - 16
The probability that a child will learn to swim before age 6 is 0.312. If you take a group of 12 children, what is the probability that 1 or fewer of the children will learn to swim before age 6? (Round your answer to 3 decimal places if necessary.)
Answer:
The probability of 1 or less children from that group to learn how to swim before 6 years of age is 0.072
Step-by-step explanation:
In this case we need to compute the probability of none of these 12 children learns to swim before 6 years of age. This is given by:
p(0) = (1 - 0.312)^(12) = 0.688^(12) = 0.01124
We now need to calculate the probability that one child learns to swim before 6 years of age.
p(1) = 12*0.312*(1 - 0.312)^(11) = 3.744*(0.688)^(11)
p(1) = 3.744*0.01634
p(1) = 0.0612
The probability of 1 or less children from that group to learn how to swim before 6 years of age is:
p = p(0) + p(1) = 0.01124 + 0.0612 = 0.07244
The probability that 1 or fewer of the 12 children will learn to swim before age 6 is approximately 0.072 when rounded to three decimal places.
1. Given:
- Probability that a child will learn to swim before age 6, ( p = 0.312 )
- Number of children, ( n = 12 )
2. Calculating ( P(X = 0) ):
[tex]\[P(X = 0) = \binom{12}{0} (0.312)^0 (1 - 0.312)^{12}\]\[P(X = 0) = 1 \times 1 \times (0.688)^{12}\]\[P(X = 0) \approx (0.688)^{12}\][/tex]
Using a calculator for [tex]\((0.688)^{12}\)[/tex]:
[tex]\[(0.688)^{12} \approx 0.0088\][/tex]
3. Calculating ( P(X = 1) ):
[tex]\[P(X = 1) = \binom{12}{1} (0.312)^1 (1 - 0.312)^{11}\]\[P(X = 1) = 12 \times 0.312 \times (0.688)^{11}\][/tex]
Using the binomial cumulative distribution function (CDF):
[tex]\[P(X \leq 1) = \sum_{k=0}^{1} \binom{12}{k} (0.312)^k (0.688)^{12-k}\][/tex]
Using the binomial probability tables or calculator, we get:
[tex]\[P(X = 0) \approx 0.0088\]\[P(X = 1) \approx 0.0623\][/tex]
Summing these:
[tex]\[P(X \leq 1) \approx 0.0088 + 0.0623 = 0.0711\][/tex]
Thus, the probability that 1 or fewer of the 12 children will learn to swim before age 6 is approximately 0.0711, which rounds to 0.072.
5.4 is an integer.
True
OR
False
Answer:
False
Step-by-step explanation:
As integer is a whole number that is not a fractional number that can be positive, negative, or zero.
Answer:
false
Step-by-step explanation:
An integer is a whole number. integers can't have a decimal places.
Write the equation in vertex form for the graph below.
Given:
The graph of the parabola with vertex (-2,-4)
We need to determine the equation of the parabola in vertex form.
Equation in vertex form:
The general form of the equation of the parabola in vertex form is given by
[tex]y=a(x-h)^2+k[/tex]
where a is the constant and (h,k) is the vertex.
Substituting the vertex (-2,-4) in the above formula, we get;
[tex]y=a(x+2)^2-4[/tex] -------- (1)
To determine the value of a, let us substitute the point that the parabola passes through.
Hence, substituting the point (0,8) in equation (1), we get;
[tex]8=a(0+2)^2-4[/tex]
[tex]8=a(2)^2-4[/tex]
[tex]8=4a-4[/tex]
[tex]12=4a[/tex]
[tex]3=a[/tex]
Thus, the value of a is 3.
Substituting the value a = 3 in equation (1), we get;
[tex]y=3(x+2)^2-4[/tex]
Thus, the equation of the parabola in vertex form is [tex]y=3(x+2)^2-4[/tex]
Answer:
Your answer is gonna be the letter B
Step-by-step explanation:
Help please.Round to the nearest hundredths
Answer:
Step-by-step explanation:
diameter = 34 m
r = 34/2 = 17 m
V=(4/3)πr³
[tex]=\frac{4}{3}*3.14*17*17*17\\\\=\frac{61707.28}{3}\\\\=20569.093333\\\\\=20569.09cubic meters[/tex]
After a rotation of 90° about the origin, the coordinates of the vertices of the image of a triangle are A'(6,3), B'(-2, 1)
and C'(1,7). What are the coordinates of the vertices of the pre-image?
С.
Answer:
A(3, -6)B(1, 2)C(7, -1)Step-by-step explanation:
Rotation by -90° about the origin is the transformation ...
(x, y) ⇒ (y, -x)
So, your pre-image points are ...
A'(6, 3) ⇒ A(3, -6)
B'(-2, 1) ⇒ B(1, 2)
C'(1, 7) ⇒ C(7, -1)
Algebra help PLEASEEE
Answer: X = -4, X = 2
Step-by-step explanation:
On the graph, the line touches the x axis on -4 and 2, therefore, those are the answers.
what is the theoretical probability of rolling a number less than 4?
Answer:
1/2 or 3/6
Step-by-step explanation:
on a die theirs 6 numbers, and the numbers 1,2,3 are less than 4. So out the the six numbers 3/6 are les than 4 and 1/2 and 3/6 are equivalent.
Is the following shape a right triangle? How do you know?
O
O
A. There is not enough information to determine.
B. No, there is no right angle.
O
c. No, the side lengths do not fit the Pythagorean theorem.
O
D. Yes, two sides are perpendicular, and the side lengths fit the
Pythagorean theorem.
PREVIOUS
a
e
9
Answer:
D. Yes, two sides are perpendicular, and the side lengths fit the
Pythagorean theorem.
Option B is correct as the shape lacks a right angle and its side lengths do not conform to the Pythagorean theorem, despite having two perpendicular sides.
What is a right-angled triangle?A right-angled triangle is a geometric shape that has one internal angle measuring exactly 90 degrees. This angle, known as the right angle, is formed by the intersection of two sides of the triangle.
The other two angles in the triangle are acute angles, which means they measure less than 90 degrees. The side opposite the right angle is called the hypotenuse, and it is the longest side in the triangle.
The other two sides are called the legs, and they form the right angle. The lengths of the legs and the hypotenuse of a right-angled triangle are related by the Pythagorean theorem, which states that the square of the hypotenuse is equal to the sum of the squares of the legs.
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rip van winkle sell asleep for a very long time when he fell asleep, his beard was 8 millimeters long and each passing week and grew 2 additional millimeters
graph the relationship between the length of rip van winkle‘s beard (in millimeters) and time (in seconds)
please answer asap
Answer:
Time in weeks you mean not seconds.
His beard should be graphed at point xy 1, 8 and continue at a gradient rate 8 rise / 1 rise showing m = 8/1 . to show one week to be able to meet up with .
Step-by-step explanation:
There are 604800 seconds in a week so first multiply by 5.5 weeks to find the first green dot. 604800 x 5.5 = 3326400 so we know the .5 option shows a rounded next week number.
We can either work downwards to zero or start at 1,8 ever way they will be even balance as 8/32 = 4 8/36 = 4.4 growth and this for example would show a rounded amount, so that 8/8 would be 8 and show the first week, or can be skipped out and start with y = 2x + 10 and then when referring to show .5 growth it would still be a whole number within the equation representing 12 and still be a whole number representing 2 weeks.
The graph does not speak of seconds but weeks, but if you want to use the above and try for 604800 seconds as shown for 1 week, you will have a tough time graphing. Stick to 2,4,6 8, 10, 12, 14, 16, 18 weeks multiplied by 12 = y = 1 + 8 = 0
y = 2x +8 +2 = 1
y = 3x + 8 +2 = 2
etc etc....
Rewrite the following the form log (c) log (20) - log (5)
Final answer:
The expression log(c) log(20) - log(5) is simplified using the quotient rule for logarithms to log(c) log(4), by subtracting the logs and simplifying the inside expression from 20/5 to 4.
Explanation:
The student's question involves simplifying a logarithmic expression. The initial expression is log(c) log(20) - log(5). To simplify this expression, we can use logarithmic properties, specifically the quotient rule of logarithms, which states that log(a/b) = log(a) - log(b).
Applying this property to the given expression, we combine the two logs that are subtracted:
log(20) - log(5) = log(20/5). Simplifying the division inside the log gives us:
log(4). Therefore, the simplified expression is log(c) log(4).
Please help I’m vvv confused
Equation is y=kx. We have four chance to figure out k; hopefully they all give the same result
x=9, y=63, y=kx becomes 63=k(9) so k=63/9=7
x=4, y=28, 28=k(4), k=7
The constant of proportionality is 7; we check 2×7=14, 11×7=77
Answer: k=7, y=7x
Answer:
y=kx
y=k(7)x
y=7x(11)
y=7*11
y=77
Step-by-step explanation:
So with useing the equation that I used the porportional relationship is 7 so just fill 7 in for k. Then take the x number and fill it in for x. you will then multiply and get the y value.
A can of orange juice has a circular base with an area of 156 square centimeters. The height of the can is 20 centimeters.
What is the volume of the can of orange juice in cubic centimeters?
A. 3120
B. 62,400
C. 176
D. 8000
Final answer:
To calculate the volume of the orange juice can, the formula V = πr²h is used. By finding the radius from the given area of the base and then using the height of the can, the volume is calculated as 3120 cm³, which corresponds to answer choice A.
Explanation:
The student has asked a question about calculating the volume of a cylindrical can of orange juice. Given the area of the circular base is 156 square centimeters and the height of the can is 20 centimeters, the volume can be found by using the formula V = πr²h, where V stands for volume, r is the radius of the base, and h is the height of the cylinder. First, we need to find the radius (r) of the base from the given area, and then substitute it into the volume formula along with the height (h).
To find the radius, we use the formula for the area of a circle, A = πr², where A = 156 cm². Solving for r, we have r = √(A/π). Plugging the area into this formula, the radius (r) is:
r = √(156/π) cm
Then we substitute the radius and height into the volume formula:
V = πr²h
V = π(√(156/π))^2 × 20 cm
V = 156 × 20 cm³
V = 3120 cm³
Therefore, the correct answer is A. 3120 cubic centimeters.
Can you help me please??
Which expression represents the distance between the points (a, 0) and (0, 5) on a coordinate grid? StartRoot a squared + 5 EndRoot StartRoot a squared + 25 EndRoot StartRoot (a minus 25) squared EndRoot StartRoot (a minus 5) squared EndRoot
Answer:Which expression represents the distance between the points (a, 0) and (0, 5) on a coordinate grid? StartRoot a squared + 5 EndRoot StartRoot a squared + 25 EndRoot StartRoot (a minus 25) squared EndRoot StartRoot (a minus 5) squared EndRoot
Step-by-step explanation:
0, 5) on a coordinate grid? StartRoot a squared + 5 EndRoot StartRoot a squared + 25 EndRoot StartRoot (a minus 25) squared EndRoot StartRoot (a minus 5) squared EndRoot
The distance between the two points is given by:
[tex]d = \sqrt{a^2 + 25}[/tex]
Which expression represents the distance between the points?
The distance between two points (x₁, y₁) and (x₂, y₂) is given by:
[tex]d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}[/tex]
Then for the given points, that are (a, 0) and (0, 5) the distance is given by:
[tex]d = \sqrt{(0 - a)^2 + (5 - 0)^2} \\\\d = \sqrt{a^2 + 25}[/tex]
Then the correct option is the second one, the square root of the sum between a squared and 25.
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Plz answer! Will mark brainliest if correct!
Answer:
order: 37, 40, 42, 47, 52, 54, 57, 60
a) mean: 48.625
b) difference: 340.375
c) 47.5 difference (between mean and mad)
d) 7.125
The Lane school sold 1,152 granola bars to raise money for digital cameras. They sold 528 berry bars. The rest were raisin bars. The granola bars came in boxes of 24 bars. How many boxes of each kind of granola bars did they sell? # of boxes of berry bars? # of boxes of raisin bars?
Answer:
berry bars= 22
raisin bars=26
Step-by-step explanation:
berry bars= 528/24
raisin bars= 1152-528/24
Answer:
22 boxes of berry bars and 26 boxes of raisin bars
Step-by-step explanation:
528 divided by 24 equals 22 boxes of berry bars
1152-528=624 so 624 divided by 24 equals 26 boxes of raisin bars
While clearing out some old inventory a store offered 30 percent off of any item(i).
Which expression can be used to calculate the new cost of an item?
A. ix 0.3
B.1-1.3
C. i- 0.3i
D. i-0.3
I believe your answer is
C. i- 0.3i
H(r) = (r+1)(r+8) what are the zeros of the function
Answer:
all work is pictured and shown
Which numbers below are odd? Check all that apply.
A. 256
B. 349
C. 313
D.726
E. 746
OF 81
Answer: B and C
Step-by-step explanation:they are odd
349,313,81 are odd numbers.
Explanation:
those numbers which are not divisible by 2 are called odd numbers.
Hope it will help u...
Round to the underlined place
Answer:
12
Step-by-step explanation:
11.9781
After tenth digit it is 7>=5. So 1 should be added to 11.9
11.9 + 1 = 12.0 = 12
On the coordinate plan, what is the distance between the points (−3, 4) and (−3, −5)?
A) 6
B) 7
C) 8
D) 9
PLZ DOOOOO NOT GUESSSSSS
Answer:
D). 9
Step-by-step explanation:
Step 1: Graph the points
Step 2: count the distance between point 1 (-3,4) and point 2 (-3,-5)
Step 3: Locate the answer on your multiply choices
Step 1: graph ( the graphed points are located in the picture below)
Step 2: count the distance (Demonstration on how to do this is on the second image below)
Step 3: Locate your answer (9)
a school admissions office accepts 3 out of every 5 applicants. given that the school accepted 750 students how many students applied?
Answer:
1250 Students applied.
Step-by-step explanation:
If you set it up as a proportion and then cross multiply, it comes out to 3x=3750 so then you would simplify and get x = 1250 as your answer!
Hope this helps!
Factor the quadratic expression completely.
2x^2+7x+3
Suppose the depth of a lake can be described by the function y = 323(0.976)x, where x represents the number of weeks from today. Today, the depth of the lake is 323 ft. What will the depth be in 6 weeks? Round your answer to the nearest whole number. The depth of the lake will be ft. in 6 weeks
Answer:
The dept of the lake will be 279 ft in 6 weeks
Step-by-step explanation:
We are given that the depth of a lake can be modeled by the function
[tex]y = 323(0.976)^{x}[/tex]
Where x is the number of weeks and y is the depth of lake in feet
The depth of the lake today is (x=0)
[tex]y = 323(0.976)^{0}[/tex]
[tex]y=323[/tex] [tex]ft[/tex]
The depth of the lake after 6 weeks will be (x=6)
[tex]y = 323(0.976)^{6}[/tex]
[tex]y = 323(0.864)[/tex]
[tex]y=279[/tex] [tex]ft[/tex]
Therefore, the dept of the lake will be 279 ft in 6 weeks.
What’s the volume of the prism? 2 ft, 8 ft, and 12 ft
Answer:
192 ft
Step-by-step explanation:
The volume of the prism with the given dimension of 2 feet, 8 feet, and 12 feet is 192 cubic feet.
What is the volume of a prism?The volume of a prism is the product of the base area and the height of the prism.
The given dimension of the prism is 2 feet, 8 feet, and 12 feet.
Therefore, the volume of the prism is
= (2 × 8 × 12) cubic feet
= 192 cubic feet.
Therefore, the volume is 192 cubic feet.
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