1) Gina has a coin collection. She keeps 10 of her coins in a box, which is only 5% of her collection. What is the total number of coins in her collection? 2 ) grocery store sells a bag of 6 apples for $2.40. What is the unit cost of each apple in the bag?

3) John bounces a basketball 40 times in 20 seconds. How many times would he bounce the ball in 180 seconds?

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

6 adults and 9 children went.

a + c = 15

12a + 9c = 153

12(6) + 9(9) = 153

72 + 81 = 153