Estimate a 15% tip for a $66.60 restaurant bill. a-$10.05
b-$6.70
c-$67.00
d-$100.50

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)