Q: 3a(a plus 4)-2a plus 7

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(7-3)^2 plus (7-1)^2 = 16+36

x + 7 + y

8k +2k + 7 = 10k + 7

10x + 7 + 3x = 13x + 7

A minus and a minus makes a plus A plus and a plus makes a plus A minus and a plus or plus and a minus makes a minus 7 - -2 is a minus and a minus Therefore the answer is 7 + 2 = 9

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Are you sure it's minus 49?If so, then:9a2 +42a -49={(3a)2 + 2·3a·7 + 72} -2·72=(3a -7)2 - (7·sqrt(2))2 (2nd binomial formula)={(3a -7) + (7·sqrt(2))} · {(3a -7) - (7·sqrt(2))} (3rd binomial formula)=(3a +2,89949) · (3a -16,89949).Otherwise if it's plus 49 then simpler:9a2 +42a +49={(3a)2 + 2·3a·7 + 72}=(3a -7)2.

42 = 2 * 3 * 7 12 = 2 * 2 * 3 Hence gcf (42, 12) = 2 * 3 = 6 Notice that a is also a factor of 12a and 42a. Hence gcf (42a, 12a) = 2 * 3 * a = 6a

2 x 3 x 7 x a x a = 42a2

7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 or 7 x 14 = 98 Dont you have a calculator...?

okay well the answer to that is 91 got it (PS. you should know it!) :) peace!

58.

The answer is 380, I hope. :P

7 + 7 + 7 + 7 + 7 + 7 + 7 or 7 X 7 = 49.

7+7+7+7+7+7+7+7 is the same as 7 multiplied by 8, so the answer is 56.

Yes.

7 Times 7 Equals7 plus 7 plus7 plus7 plus7 plus7 plus 7, or 7 times 7, equals 49.

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