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4 years ago

The set of scores on a mathematics test is 72, 80, 80, 82, 87, 89 and 91. The mean score is

Mathematics

2 answers:

stich3 [128]4 years ago

8 0

Answer:

Step-by-step explanation:

add all the numbers, then divide by how many numbers there are.

72+80+80+82+87+89+91=581

581÷7=83

Masja [62]4 years ago

5 0

Answer:

72 + 80 + 80 + 82 + 87 + 89 + 91= 581

581/7= 83 is the mean score

Step-by-step explanation:

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During a musical an orchestra is playing. As the music plays, the volume changes in the beginning of the piece can be modeled by

Alja [10]

Answer:

The numbers of measure of music played are 1 and 7

Step-by-step explanation:

Given

$s = 10|x - 4| + 50$

Required

Solve for x when s = 80

Substitute 80 for x

$80 = 10|x - 4| + 50$

Subtract 50 from both sides

$80 - 50= 10|x - 4| + 50 - 50$

$30= 10|x - 4|$

Divide through by 10

$\frac{30}{10}= \frac{10|x - 4| }{10}$

$3= |x - 4|$

Reorder

$|x - 4| = 3$

This can be split into

$x - 4 = 3$ or $x - 4 = -3$

Solve for x

$x = 4 + 3$ or $x = 4 - 3$

$x = 7$ or $x = 1$

Hence:

The numbers of measure of music played are 1 and 7

4 0

3 years ago

The function ()=2,708.92(1.12) − 12 models the amount of money in Caleb's investment account after years.

wolverine [178]

Answer:

d i think

Step-by-step explanation:

5 0

3 years ago

HELP PLEASE LOTS OF POINTS!!

Paladinen [302]

Answer:

Thus, f and g are inverse functions

Step-by-step explanation:

Inverse Functions

If two functions f(x) and g(x) are inverses, then it follows that:

$f\circ g(x)=x$

Or:

$g\circ f(x)=x$

We are given

$\displaystyle f(x)=\frac{1}{4}x-6$

$g(x)=4x+24$

Let's test if they are inverse functions:

$f\circ g(x)=\frac{1}{4}(4x+24)-6$

Simplifying:

$f\circ g(x)=x+6-6=x$

Now find:

$\displaystyle g\circ f(x)=4\left(\frac{1}{4}x-6\right)+24$

Operating:

$\displaystyle g\circ f(x)=x-24+24=x$

Thus, f and g are inverse functions

6 0

3 years ago

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Which property is illustrated by the equation -8+0=-8?

Sophie [7]

Additive Identity.
When a number (x) added to zero it will give the number itself as the result.
X + 0 = X
74 + 0 = 74

4 0

3 years ago

A? B? C? D?..................................................

zhenek [66]

Answer:

Step-by-step explanation:

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5 0

3 years ago

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