MATHEMATICS MIDDLE SCHOOL

20=2(r+7)
I need help with this equation
20=2(r+7) I need help with this equation - 1

Answers

Answer 1
Answer: Hi there! :) The answer to your question is 3. First you do parenthesis r=3.
3+7=10, then you do 10*2=20. That is how you solve the problem.


Hope I helped! :)
( Mark as Brainliest Answer! Thank you! :)
Answer 2
Answer: 20 = 2(r + 7)
20/2 = r + 7
10 = r + 7
10 - 7 = r
3 = r
r = 3

The answer is: r = 3.

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20 POINTS! WILL MARK BRAINIEST FOR FIRST CORRECT ANSWER! The figures in (a) and (b) below are made up of semicircles and quarter circles; The figure in (c) shows a quarter of a circle in a square. Find the area and the perimeter of each figure in terms of π.

Answers

Answer:

brainly.com/question/8182874

Step-by-step explanation:

Answer:

Area: 5π/2 in²

Perimeter: (3π+2) in

step-by-step explanation:

Area =

larger semicircle + small semicircle

= ½(pi × r1²) + ½(pi × r2²)

r1 = 2 in

r2 = 2/2 = 1 in

Area:

½(pi × 2²) + ½(pi × 1²)

= 2pi + ½pi

= 5pi/2 in²

Perimeter:

½(2pi × r1) + ½(2pi × r2) + r1

½(2pi × 2) + ½(2pi × 1) + 2

2pi + pi + 2

3pi + 2

In a multiplication problem, if the first factor has 5 digits after the decimal and the second factor has 4 digits after the decimal, then the product will have _____ digits after the decimal.1
4
5
9

Answers

The answer is 9. When multiplying by decimals, you add up how many numbers are after the decimal in both numbers. So, the first on had 5, the second had 4.
5 + 4=9

The answer will have 9 digits after the decimal.

Hope I helped 

At a school fair 70% of the people are under 16 years old. One-third of the people remaning are teachers. If there are 21 teachers at the fair, how many people are there at the fair total

Answers

Let's write out what we do know...

70% of the people are under 16 years old

From this information, we can infer that 30% of the people are 16 or older.

100%-70%=30%

1/3 of the people 16 or older are teachers. There are 21 teachers.

1/3 of 30% is 10%

1/3*.30=.10 or 10%

So 21 is 10% the total number of people at the fair.

(10)/(100)= (21)/(x) 2100=10x 210=x

(I cross multiplied and then divided both sides by 10 to get x=210)

There are 210 people at the fair.
30% remains
a third of 30% is 10%
so 10% are teachers
21 (amount of teachers) × 10 = 210
answer = 210

Answer to question number seven

Answers

Answer: The third option, 6.

Find the value of x.

Answers

i think x+(180-4x)=108
x=24

Question

Find the value of x.

Answer

x=24

Hope this helps!

a jigsaw puzzle contains 50 pieces if joining any 2 pieces or groups is considered as one move what is the least amount of moves to put it together

Answers

The answer would be 25 because if every 2 pieces is one move you would divide 50 by 2.
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