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2 years ago

Please answer show all your work or tell me the steps

Mathematics

2 answers:

Phoenix [80]2 years ago

8 0

Answer: for the first one it is 22 percent

Step-by-step explanation: first I found out that 14.08 is In-between 64 and 78.08 . Then I devided 14.08 by 64 so I got 0.22 then i made that a percentage by multiplying it by 10. So the answer is 22 percent. Please mark me brainiest.

I did it on the other one but here is the full explanation

Harrizon [31]2 years ago

8 0

The second one is $25 because 23.36 times 7% equals 1.36 then add 23.36 and 1.36 and you get $25

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3x+2(x-5)=25 show your work

Zanzabum

Answer:

x = 7

Step-by-step explanation:

Expand 3x+2(x-5)=25 which looks like

3x+2x-10=25

Add similar elements: ( 3x+2x = 5x)

5x-10=25

Add 10 to both sides

5x-10+10 = 25 + 10

Simplfy

5x = 35

Divide both sides by 5

5x ÷ 5 = 35 ÷ 5

Simplfy:

x = 7

have a wonderful day

8 0

2 years ago

What is the potential energy of a 500kg elevator that is 4.0m high from the floor?

rodikova [14]

Answer:

Step-by-step explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

We have

PE = 500 × 9.8 × 4

We have the final answer as

Hope this helps you

6 0

2 years ago

The area of a circular sun spot is growing at a rate of 1,200 km2/s.

Tpy6a [65]

A)

$\bf \textit{area of a circle}\\\\
A=\pi r^2
\\\\\\
\cfrac{dA}{dt}=\pi \cdot 2r\cfrac{dr}{dt}\implies \cfrac{dA}{dt}=2\pi r\cfrac{dr}{dt}\implies \cfrac{\frac{dA}{dt}}{2\pi r}=\cfrac{dr}{dt}\\\\
-----------------------------\\\\
\left. \cfrac{dr}{dt} \right|_{r=3000}\implies \cfrac{1200}{2\pi \cdot 3000}=\cfrac{dr}{dt}\\\\$

B)

$\bf A=\pi r^2\qquad A=490000\implies 490000=\pi r^2\implies \sqrt{\cfrac{490000}{\pi }}=r
\\\\\\
\left. \cfrac{dr}{dt} \right|_{r=\sqrt{\frac{490000}{\pi }}}\implies \cfrac{1200}{2\pi \cdot \sqrt{\frac{490000}{\pi }}}=\cfrac{dr}{dt}
$

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2 years ago

What qualities are often found in a superheroes

AlexFokin [52]

Answer:

Honor, Courage, and Bravery

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Help pls. this topic is confusing for me

Leya [2.2K]

Answer:

My brother took this test and said it was 35. Im not sure but try it

Step-by-step explanation:

3 0

3 years ago