Asystem of equations has no solution. if y = 8x + 7 is one of the equations, which could be the other equation?

y = 8x + 7

y = 8x – 7

y = –8x + 7

y = –8x – 7

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

Which number produces a rationale number when multiplied by 1/5

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?