For which equation would x = 3 be a solution?

x + 7 = 4
x - 2 = 1
5 + x = 9
8 - x = 11

what is the solution to the equation 7.5 - x = 2.8?

x = 4.7
x = 5.3
x = 5.7
x = 10.3

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

The table shows the number of hours orlando spent at football practice last week. select the appropriate numbers below to complete the model to find the number of hours orlando spent practicing on tuesday and friday.