Answer:
Yes, because if you substitute 10 for r in the equation and simplify, you find that the equation is true.
Step-by-step explanation:
Find the missing length.
2 answers:
To find the missing length of this triangle you need to use the Pythagorean Theorem.
As shown in the image we are given three sides: 1, 8 and c and so you have to substitute these numbers into the equation a squared + b squared = c squared.
So it should look like:
1 squared + 8 squared = c squared, so solve it to be
1 + 64 = c squared which is 65 = c squared
Now you have to isolate the variable c because that is what you are trying to find so you must square root both sides:
= c
So that should be your answer.
Hope this helps!
(if it doesn't work then you might have to simplify)
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Answer:
There are 20 kids total in the class.
Step-by-step explanation:
15/100 × 20 = 3
You can use direct proportion for any percent calculation.
Compare each number with its percent.
3 i s 15 % of what number? Let the number be x
So, 3 represents 15 % and x represents 100 %
x/ 100 = 3/15
Multiply by 100 to isolate x
x =
x = 20
Check: 15/ 100 × 20 = 3