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  1)  16

  2a)  100 -a -2b

  2bi)  (100 -a -2b)/4

  2bii)  11

Step-by-step explanation:

1. Put the numbers where the corresponding variables are and do the arithmetic.

  (2(1) +3(-2))^2 = (2 -6)^2 = (-4)^2 = 16

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2. The pieces cut from the wire have the lengths a, b, b. The sum of those lengths is a+b+b = a+2b.

2a. The remaining length is what is left when the total of cut pieces is subtracted from the original amount:

  100 -(a+2b) = 100 -a -2b

2bi. The perimeter of the square is the amount in part (2a). A square has 4 sides of the same length, so each side has a length that is 1/4 of the perimeter. The side length is ...

  (100 -a -2b)/4 . . . . length of one side of the square

2bii. Fill in the given values for "a" and "b" and do the arithmetic.

  (100 -24 -2(16))/4 = (76 -32)/4 = 44/4 = 11 . . . one side of the square

4

step-by-step explanation:

6 (donuts) divided by 3 is 2.

so 2/3 means 2 times 2, which is 4/6.

you get two and your friend gets four.

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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step-by-step explanation: