MATHEMATICS HIGH SCHOOL

I don’t know this one

Answers

Answer 1

Answer:

Answer:

3077.2

Step-by-step explanation:

A circle's mass is found by

Pie times R^2

7^2 is 49, times 3.14 is 153.86

then you Multiply 153.86 by 20 which gives you 3077.2

Answer 2

Answer: Volume of a cylinder = pi r^2 * h
Pi 7^2 * 20
Volume = 49 pi

Density = mass/ volume
2.5= mass/ 49 pi
Mass= density * volume
= 2.5*49 pi
= 245/2 pi
= 384.845...
=384.8 g to 1 dp

Answer= Volume

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The population of a city in Dallas area went from 35,000 to 87,500 in 12 years . What is the percent of increase

Answers

Answer:

150 percent increase

Step-by-step explanation:

The formula for the perimeter of a rectangle is p=2l 2w. solve for w. w=p−2l/2 w=2p/l w=p 2l w=2p−l

Answers

$p=2l+2w\ \ \ \ \ |subtract\ 2l\ from\ both\ sides\n\n2w=p-2l\ \ \ \ |divide\ both\ sides\ by\ 2\n\n\boxed{w=(p-2l)/(2)}$

Answer:

w=p/2-l

Step-by-step explanation:

I am in k-12 and got 100% on this quiz

Find the product mentally.
(z - 12)(z + 12)

Answers

(a-b)(a+b) = a² - b²

(z-12)(z+12) = z² - 12² = z² - 144

Your final answer is z² - 144.

Max's age is 2 more then his father's age divided by 4 max is 13 years old. how old is his dad?

Answers

First write an equation for this (with X being the dads age).
X/4 +2= 13

Solve for x to find the dads age.

X/4=11
X=44
His dad is 44 years old

it wood be 13

*2=26 is the anser

How do you factor 6x^2+14x+4

Answers

(3x+1) (2x+4)

When the first number has multiple factors (like 6) it often times seems to be the factors that are closest together (3×2 instead of 6×1) So I usually use that as a starting point and play with the numbers until you find your answer. The more you do it, the easier it gets. And remember to always check your answer!

A golf course in Phoenix, Arizona, uses an average of 80 million gallons of water daily for irrigation. An average family of four (also living in Phoenix, AZ) uses 325,851 gallons of water per year. Rounded to the nearest ten, how many families of four can one golf course provide water for?