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algol13
4 years ago
14

Mandy scored 88, 94, 82, and 89 on her math tests. What is the least score she can earn on her next math test to have a mean of

90 or more
Mathematics
1 answer:
Anika [276]4 years ago
5 0
She would have to score at least a 97% on her next math test.

Mean = 88 + 94 + 82 + 89 + 97 = 450
450/5 = 90

You could have found this answer without using trial and error.
If she wants to get a mean of 90 and she will have 5 tests, you can multiply these together.
This equals 450.
Now you need to find the minimum score she needs to get. Take 450 and subtract what the original 4 numbers equal, 353.
This gives you 97.
I hope that makes sense :)
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What is the function g(x) created from f(x) = x^2 by moving the graph left 9 units, vertically stretching it by a factor of 4, a
MariettaO [177]

<u>Given</u>:

The parent function is f(x)=x^2

We need to determine the function g(x) created from the function f(x) by moving the graph left 9 units, vertically stretching it by a factor of 4, and shifting the graph up 5 units.

<u>Shift left 9 units:</u>

The rule to shift the graph c units to the left is given by

y=f(x+c)

where c is the positive real number.

Hence, to shift the graph 9 units to the left is given by

f(x)=(x+9)^2

<u>Vertical stretch by a factor of 4:</u>

The rule to stretch the graph vertically by a factor of c is given by

y=cf(x)

where c>1

Hence, to stretch the graph vertically by a factor of 4, we have;

f(x)=4(x+9)^2

<u>Shifting 5 units up:</u>

The rule to shift the graph c units upward is given by

y=f(x)+c

where c is the positive real number.

Hence, to shift the graph 5 units upward is given by

f(x)=4(x+9)^2+5

Therefore, the function g(x)=4(x+9)^2+5 is created from the graph f(x)=x^2 by moving the graph left 9 units, vertically stretching it by a factor of 4 and shifting up 5 units.

Hence, the graph g(x) is g(x)=4(x+9)^2+5

5 0
3 years ago
Solve the equation below pls show your work no links pls.<br> <img src="https://tex.z-dn.net/?f=%289%5E%7B2%7D%20%29%5E%7B-1%2F3
avanturin [10]

Given :-

  • (9^{2} )^{-1/3}

To Find :-

  • To solve the expression .

Solution :-

Given expression to us is ,

(9^{2} )^{-1/3}

We know that ,

9 = 3^2

So our expression becomes ,

\{ (3^2)^2\}^{\frac{-1}{3}}

And , (a^m)^n =a^{mn} . Using this ,

(3^4)^{\frac{-1}{3}}

Again using the same law ,

3^{\frac{-4}{3}}

We know that , a^{-m}=\frac{1}{a^m} . Therefore ,

(3^{-4})^{\frac{1}{3}}

\\\bigg( \dfrac{1}{3^4}\bigg)^{1/3}

\\ \dfrac{1}{\sqrt[3]{3^4}}

Simplify ,

\dfrac{1}{3\sqrt[3]{3}}

This is the simplified expression.

<em>I </em><em>hope</em><em> this</em><em> helps</em><em>.</em>

3 0
2 years ago
What is the y intercept of x-y=6
zvonat [6]

Answer:

b=-6

hope this helps!

Step-by-step explanation:

b= y intercept

3 0
3 years ago
Please can someone help with full answer
Alex73 [517]

Answer:

3

Step-by-step explanation:

4 0
4 years ago
A number decreased by the total of the number and fourteen
Charra [1.4K]

The answer to this would be x-(x+14)

Here's an explanation:

Let x represent the unknown number. The problem says that x has been decreased by the sum of x and 14. So, to put this in a form of an equation, it would be x-(x+14), since you have to do the addition first before you can subtract the two number since you don't know what x is. This equation is equal to -14 no matter what x is.

4 0
3 years ago
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