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2 years ago

HELP AND HURRY UP pleas

Mathematics

1 answer:

Harrizon [31]2 years ago

8 0

Answer:
the first choice

x=3

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Find (f*f)(3)<br><br> f(x)=x^2-x<br><br> A. 30<br> B. 6<br> C. 33<br> D. -6

Tems11 [23]

Answer:

Step-by-step explanation:

$(f\circ f)(x)=f\bigg(f(x)\bigg)\\\\f\bigg(f(3)\bigg)\\\\\text{Calculate}\ f(3):\\\\f(3)=3^2-3=9-3=6\\\\f\bigg(f(3)\bigg)=f(6)=6^2-6=36-6=30$

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4 years ago

We are painting a rectangular wall of a large room. The dimensions of the wall are 35feet long and 21.5 feet wide. If the total

SVETLANKA909090 [29]

Answer:

56 cent per ft²

Step-by-step explanation:

Wall dimension = 35 feets * 21.5 feets

Total cost of paint used = 421.40

Area of wall = Area of rectangle = Length * width

Area of wall = 35 feets * 21.5 feets

Area of wall = 752.5 ft²

Cost of paint per square feet:

Total coast of paint / Area of wall

$421.40 / 752.5 ft²

= $0.56 per ft²

= 0.56 * 100 = 56

8 0

3 years ago

A small pizza has a diameter of 21 cm. What is the approximate circumference of the pizza? Use π= 3.14.

Allisa [31]

Circumference=πd
=3.14x21
=65.94cm²

7 0

3 years ago

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A normally distributed population has a mean of 250 pounds

Dima020 [189]

Answer: 0.9746

Step-by-step explanation:

Given : A normally distributed population has a mean of 250 pounds and a standard deviation of 10 pounds.

i.e. $\mu=250$ $\sigma=10$

Sample size : n= 20

Let $\overline{x}$ sample mean values.

Then, the probability that this sample will have a mean value between 245 and 255 be

$P(245$

Hence , the probability that this sample will have a mean value between 245 and 255 is 0.9746 .

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3 years ago

How much does the costumer save?

lions [1.4K]

Answer: The consumer saves $45

Step-by-step explanation:

If you multiply 20 by 3 you get 60 then you multiply by .75 and you get 45

4 0

3 years ago

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