How do you substitute?

Simplify 8 + (9-3) + 72

Two forces of 7 lb. and 14 lb. act on a body at right angles to each other. Find the angle their resultant force makes with the force of 14 lb. A. 18 B. 27 C. 63

8.77 as an improper fraction

10 + (4x (13-5)) - 6 order of operations show ur work

Order these numbers from least to greatest. 16310, - 270, - 503, - 16.5

What is the area of a triangle that has a base of 10 inches and a height of 7 inches

Research scientists need a certain type of bacteria to conduct an experiment. There are 100 bacteria in a certain culture. The culture grows at a rate of 70% daily. The scientists need at least 1,400 bacteria to conduct an experiment.

Round 0.584 to the nearest tenth

Emily purchased a couch, loveseat, in the chair for $2000. The Loveseat cost twice as much as the chair, and the couch cost $600 more than the love seat. Find the cost of the couch, loveseat, and chair.

x3 + 11x2 - 3x - 33 by grouping?