Solve the proportion using cross products. Round to the nearest hundredth if necessary. 21/49=15/h hours
A.35
B.2.5
C.4.2
D.6.0
(I would like a teacher from here to help me asap. I don't know what to do so an explanation would be appreciated. Thank-you.
so do the product.
21h = 49*15
now divide by 21
The answer is 35 Thank you oobleck!
To solve the proportion using cross products, you need to set up the equation by multiplying the denominator on one side with the numerator on the other side.
21/49 = 15/h
Cross multiplying:
21 * h = 15 * 49
Now you can solve for h by dividing both sides by 21:
h = (15 * 49) / 21
Using a calculator or long division, you will find that:
h ≈ 35.00
(rounded to the nearest hundredth)
Therefore, the correct answer is A. 35
To solve the proportion using cross products, you need to set up the equation by multiplying the numerator of each fraction with the denominator of the opposite fraction. In this case, you would have:
21 * h = 49 * 15
Next, simplify the equation by multiplying the numbers:
21h = 735
Now, divide both sides of the equation by 21 to isolate the variable h:
h = 735 / 21
Calculating this division, you'll find:
h ≈ 35
Therefore, the answer is A. 35.
If you encountered a different question or need any further assistance, please let me know!