1.
7(3) - 2 · 4 13
21-8
21-8=13
Since this is pre- algebra I do realize that you mean. The answer is 13 :D
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It is called a term.
An algebraic term.
Each number is obtained by doubling the previous number and then subtracting a number that itself keeps doubling: 15 times 2 is 30, minus 1 is 29 29 times 2 is 58, minus 2 is 56 56 times 2 is 112, minus 4 is 108
The perimeter is 24 inches. Each side is 6 inches. (8 times the length of one side) minus (24 inches) = 48 - 24 = 24 inches
Multiply each term of the binomial by the monomial. Be particularly careful with signs: (+ times +) or (- times -) equals plus or Like signs = + (+ times -) or (- times +) equals minus or Unlike signs = -