Tom spent half of his allowance going to the movies. he washed the family car and earned 6 dollars. what is his weekly allowance if he ended up with 12 dollars ?

12 - 7 is half of his allowance which is 5

so his full allowance is 5 times 2 or...

10

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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step-by-step explanation:

plese mark mde brainliest!