What is the following sum? 5(3sqrtx)+9(3sqrtx)

5(3√x) +9(3√x)  = 15√x+27√x= 42√x

5∛x + 9∛x = 14∛x

Step-by-step explanation:

the answer is C

Step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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