Noah has a mask collection of 40 masks. He keeps some in a display case and the rest on the wall. He keeps 15% of his masks in the display case. How many masks does he keep on his wall?

1) convert percentage to decimal

2) determine # of masks on the display case

×

3) subtract from total # of masks

He keeps 34 masks on the wall.

d is correct

step-by-step explanation:

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)