12. Determine which ratio forms a proportion with 15/8 by using cross products.

Mathematics

2 answers:

Xelga [282]2 years ago

6 0

Answer to 12: C.

Explanation: By dividing 60 by 15 you get 4 and by dividing 32 by 8 you get 4. 15 and 8 both go into it evenly so that is the answer.

Answer to 14: B

Explanation: when you divide 236.25 by 7 you get 33.75 and then multiply that by 2 and you get 67.7 so you know 2 fluid ounces of milk contain 67.7 mg of calcium

sorry i couldnt answer 13

m_a_m_a [10]2 years ago

6 0

Answer:

Ratios that can form a proportion with 15/8 are those that are equivalent fractions. In this case, 60/32 can form a proportion with 15/8, because they are equivalent, if we simplify 60/32 we would have 15/8, because 60/4=15 and 32/4=8.

Therefore, the right answer is C.

Here we apply the same definition, a proportion is an equality between two fractions. In this case, the ratios that can form a proportion are A. 9/45, 8/40, because both fractions are equivalent to 0.2.

To solve this problem, we can apply the rule of three, if 7 ounces of milk provides 236.25 milligrams of calcium, how many ounces of milf would provide 67.5 milligrams of calcium.

$67.6 \ mgCa\frac{7 \ oz}{236.25 \ mgCa}= 2.00 oz$

Therefore, the right answer is B.

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