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Contact [7]
3 years ago
12

Using n = 3.14, what is the circumference of a circle with a radius of 20 units?

Mathematics
1 answer:
pav-90 [236]3 years ago
4 0

Answer:

125.6

Step-by-step explanation:

C=2pir

C=2(3.14)(20)=125.6

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The ratio of the number of boys to the number of girls in a school is 5:7.If there are 600 students in the school,how many girls
nekit [7.7K]
So,

The secret to solving problems with ratios is to find the value of one unit.

5:7 = 12 units total

To find one unit, divide the total number of students by the total number of units.
600/12 = a

Simplify
50/1 = a
50 = a

The value of each unit is 50.

Now, multiply the units by the numbers in the ratio.
50(5) = b
250 = boys

50(7) = x
350 = x

There are 350 girls.
3 0
3 years ago
Read 2 more answers
10x +7 = -3х – 3 help guys
Pepsi [2]

Answer:

x = -10/13

Step-by-step explanation:

10x + 7 = -3x - 3

Add 3x to both sides

10x + 3x + 7 = -3x + 3x - 3

13x + 7 = 0x - 3

13x + 7 = -3

Subtract 7 from both sides

13x + 7 - 7 = -3 - 7

13x + 0 = -10

13x = -10

Divide both sides by 13

13x ÷ 13 = -10 ÷ 13

1x = -10/13

x = -10/13

6 0
2 years ago
Which arrow best shows the position of -v5 on the number line?
ki77a [65]
The answer should be A
4 0
3 years ago
What is the value of x in the equation x – y = 30, when y = 15?
joja [24]
I think isn't anyone of these alternatives because if we put number 15 in the place of y it is x-y=30. X-15=30
X=30+15=45.
X=45
4 0
2 years ago
ben walks at a rate of3 miles per hour. he runs at a rate of 6 miles per hour. in one week, the combined distance that he walks
Ainat [17]
3W+6R=210

For R:25
3W+6(25)=210
3W=150=210
3W=60
W=30
8 0
3 years ago
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