Solve for the unknown in the following diagram. Round the answer to two decimal places.
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2-digit numbers less than 91 which are 1 less than a multiple of 10

Read the following two statements. then use the law of syllogism to draw a conclusion. if the tv is too loud, then it will give me a headache. if i have a headache, then i will have to rest.

Evaluate the expression for the given value of the variable 7a - 4a for a =8