Answer:

Step-by-step explanation:

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Answer:
665 ft^2
Step-by-step explanation:
since the length is 3 less than TWICE the width (19) then we can make this equation:
L = 2(19) - 3
this gives us:
L = 38 -3 = 35
so the L is 35. now we multiply the width and the length which is 19 x 35 which gives us 665 ft^2
Answer:
<3, 7> and [3 7], b and c
Step-by-step explanation:
multiply the vector by the matrix {1 0} (top row) {0 -1} bottom row. So you flip the sign of the -7 and this gives us +7.
paint is needed to cover an entire wall : 2
if 1/2 gallon of paint cover 1/4 of a wall => 1 wall = (1/2)/(1/4) =2
Because 4 people likes both, we take out 4 from the sum of both the number to avoid double count.
People who like both sports = 12 + 16 - 4 = 24
People who do not like either sport = 30 - 24 = 6