13.

Nurul had $450. She spent 2/5 of it to buy a watch and 4/9 of the

remainder to buy a DVD player,

(a) How much money did she spend altogether?

(b) How much money had she left?

110 decreased by 70%

The supplement of an angle is six times as large as the complement of the angle. What is the measure of the angle to the nearest whole degree?

As a mountain climber is hikes up Mount Rainier, it becomes harder for him to breath the higher he goes. Why does this happen? How does low air pressure affect your breathing?

49 and 95 is a multiple of 3,6,7

What is the equation for a school sales pencils to students for $.25 each. If a student has nine dollars how many pencils can a student by

Ac=3 (x-6) and BD=x+6

Tony has 50 miles to his destination after 21 minutes of driving and he has 40.4 miles to his destruction after 33 minutes of driving. How many miles will he have to his destination after 37 minutes of driving?

Describe a situation in which there would be a positive association between two variables.

One angle of a triangle measures 34. A second angle measures 81. What is the measure of the third angle of the triangle? A: 65 B: 99 C: 115 D: 146

What are the x and y intercepts of the equation x=-5?