How do you determine if two numbers or expressions are equal?

Find the area of triangle whose base is 15cm and height is 10cm

What is 8% of 8393 ...

Which equation represents the sentence? The sum of 14 and a number is 8 times the number. 14 + n = 8n 14n = 8 + n 14n + 8 = n 14 (n + 8) = n

Factor completely. 49 t6 - 4 k8

What do I do I don't know what to do

Which mixture of gases is thought to have made up Earth's early atmosphere? A. methane, oxygen, hydrogen, water vapor b. carbon dioxide, nitrogen, oxygen, ozone C. hydrogen, water vapor, ammonia, methane, carbon dioxide d.

Reed uses 8 pieces of glass per square foot to make a stained glass window. How many pieces of glass will he need to make a window that is 864864 square inches?

Frank is building a table. He needs 4 pieces of wood for the table legs. Each piece of wood needs to be 7/8 of a foot long. What is the total amount of wood he needs for the legs? A. 3 1/2 feet B. 3 2/5 feet C. 4 4/7 feet D. 4 7/8 feet

I don't know how to solve questions like this. k-10=-7

If angle 4 is 22 degrees, what is the measure of arc FE?