What does c and h mean in the system of equation, 34.50=4h+7c and 30.50=8h+3c

The radius of circular pond is 35m. Calculate the area of the path 3.5m wide running outside the pond.

The expression 12+x+4 represents the perimeter of a triangle. Simplify the expression.

A man runs to a telephone and back in 15 minutes. His speed on the way to the telephone is 5m/s and his speed on the way back is 4m/s. Find the distance to the telephone.

If a variable cannot be removed during an experiment (such as rainfall variations on crop growth), how can researchers know if that variable is causing the observed effect or if the thing they are studying (such as fertilizer) is causing the effect?

Greg is driving a remote control car at a constant speed. He starts the timerbwhen the car is 5 ft away. After 2 seconds the car is 35 ft away. Estimate the distance the car has traveled after 10 seconds

The ratio of girls to boys who participated in the quiz bowl was 7 : 5. there were 42 girls in the competition. how many boys participated

Helen divides up some money to give equally to her eight nieces. If d represents the total amount, enter an expression to represent how much money each niece receives.

How many triangles can be constructed with angles measuring 80 degrees, 80 degrees, and 40degrees A. More than one B. none C. One

The moon is 2.4 X 10^5 miles from Earth. Assume the speed of the fastest spacecraft is 3.6 X 10^4 miles per hour.

Marshea recipes calls for 2/3 cups of flour she only has one half how much more does she need