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michaelsoupios
25.03.2020 •
Mathematics
The variable y is directly proportional to the variable x. If y = 21 when x = 9, what is the value of y when x = 12?.
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Ответ:
28
Step-by-step explanation:
So we can represent the x-y relationship with a fraction, 21/9(y/x)
Let’s take the unknown y number as “y”
So y/12=21/9(since they are proportional they equal each other)
1)cross multiply:
9y=12*21
9y=252
Divide both sides by 9
Y=28
Hope this helps!
Ответ:
answer: hello! you solve this algebraically3(x - 5) + 7x = 65distribute the 33x - 15 + 7x = 65combine like terms10x - 15 = 65add both sides by 1510x = 80divide both sides by 10x = 8the answer is 8hope this
step-by-step explanation: