Is x = –4 a valid solution this linear equation?
2x + 9(x – 1) = 8(2x + 2) – 5

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Divide. –4.2 ÷ 6 = a –0.7 b 0.7 c –7 d 7 me

Griffin ordered a pair of sneakers online. he had a $22 credit that he applied toward the purchase, and then he used a credit card to pay for the rest of the cost. if the shoes cost $58, how much did griffin charge to his credit card when he bought the sneakers?