What is the solution to the equation?

-8x + 9x - 21 = - 12 - 16

Round 547 to the nearest ten

Y=x+4 and y-4=x. Is there no solution one solution or infinitely many

Raul is building a house. On day 1, he uses 3 bags of cement. On each of the following 3 days, he uses 3 times the number of bags used the previous day. How many bags of cement does he use in the last 3 days?

A seagull flying over a lake drops a fish from 81 feet. after about how many secomds does the fish land in the water?

State the degree x^5y^2+7x^3y^7-3x^2y^4

Alvin had two jobs last year, and he received two W-2 forms. On the first W-2 form, the figure in box 1 was $14,389.26, while on the second W-2 form, the figure in box 1 was $9397.18. What was Alvin's gross income from the two jobs last year

A-2=3/4 solve following equation for a.

What is the greatest common factor of 4?

What is the approximate area of a 70 decree sector of a circle with a radius of 8 inches

How many different triangles can be drawn with the angle measures 90 45 and 45