Earth’s diameter at the equator is 7,917.5 miles. Find the distance around the Earth at its equator to the nearest tenth.

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin(a+b).

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students