Simplify the expression: (1 − 5i)(3 + 7i).

38 + 8i
−32 + 8i
38 − 8i
−32 − 8i

Your answer is 38-8i because what you do is 1 times 3 and get 3 then 1 times 7i and get 7i then you do -5i times 3 and you get -15i then -5i times 7i and you get -35i2 and the square will cancel out the negative and make it 35 then add that to the 3 and you get 38 then take the -15i +7i and get -8 do your answer is 38-8i

B. 2 1/2 feet. multiply 2.5 inches by 12 to get thirty inches then divide by 12 to get 2.5 feet

The answer will be y=-5+0 because the slope is -5 and the it has to go through y-axis 0