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3 years ago

Anyone know how to do this?

Mathematics

1 answer:

pochemuha3 years ago

7 0

Answer:

Step-by-step explanation:

The graph on the left is a closed circle at x=2, and the graph is only extending to lower values so it will only apply when x ≤ 2

The only piecewise functions that include x ≤ 2 are A and C

But the y intercept of the graph is at 2, so C is the only answer

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The average of a list of 4 numbers is 90.0. A new list of 4 numbers has the same first 3 numbers as the original list, but the f

Thepotemich [5.8K]

Answer:

the average of this new list of numbers is 94

Step-by-step explanation:

Hello!

To answer this question we will assign a letter to each number for the first list and the second list of numbers, remembering that the last number of the first list is 80 and the last number of the second list is 96

for the first list

$\frac{a+b+c+80}{4} =90$

for the new list

$\frac{a+b+c+96}{4} =X$

To solve this problem consider the following

1.X is the average value of the second list

2. We will assign a Y value to the sum of the numbers a, b, c.

a + b + c = Y to create two new equations

for the first list

$\frac{y+80}{4} =90$

solving for Y

Y=(90)(4)-80=280

Y=280=a+b+c

for the second list

$\frac{y+96}{4} =X\\$

$\frac{280+96}{4} =X\\x=94$

the average of this new list of numbers is 94

4 0

3 years ago

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Quick anyone know the answer to this?

nata0808 [166]

The top question is B. 30, because you have to set 7y-30 equal to 4y+60 since both lengths are the same.

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3 years ago

Explain what a, h, and k do to transform the following equation. Be sure to mention the shift or transformation each variable do

dangina [55]

Answer:

a: vertical stretch

h: horizontal translation (remember not to get signs mixed up!)

k: vertical translation

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2 years ago

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What is the solution to this inequality? x - 8 > -3 A. X>-11 B. X<-11 C. X<5 D. X>5

erik [133]

Answer

D. X>5

Step by step explanation

x - 8 > -3

Here we have to find the value of x.

Add 8 on both sides, we get

x - 8 + 8 > -3 + 8

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Thank you.

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3 years ago

Find the quadratic function that fits the following data. which one function fits.

Oksana_A [137]

Answer:

Step-by-step explanation:

The general rule for the quadratic function is

$y=ax^2+bx+c$

Use the data from the table:

$y(50)=130\Rightarrow 130=a\cdot 50^2+b\cdot 50+c\\ \\y(70)=130\Rightarrow 130=a\cdot 70^2+b\cdot 70+c\\ \\y(90)=200\Rightarrow 200=a\cdot 90^2+b\cdot 90+c$

We get the system of three equations:

$\left\{\begin{array}{l}2500a+50b+c=130\\ \\4900a+70b+c=130\\ \\8100a+90b+c=200\end{array}\right.$

Subtract these equations:

$\left\{\begin{array}{l}4900a+70b+c-2500a-50b-c=130-130\\ \\8100a+90b+c-2500a-50b-c=200-130\end{array}\right.\Rightarrow \left\{\begin{array}{l}2400a+20b=0\\ \\5600a+40b=70\end{array}\right.$