Leah is solving the equation 106-3156-1) = 245 + 3) - 5c. The result of each step of her solution is shown below.
10c-3156-1) = 2(4c+ 3)-50
100-150+ 3 = 38+6-50
-50+ 3 = 30 + 6
25+ 3 = 6
20= 3
c=.1.5

In triangle abc segment de is parallel to the side ac . (the endpoints of segment de lie on the sides ab and bc respectively). find de, if ac=20cm, ab=17cm, and bd=11.9cm;

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup