Simplify: (4x2 + 8xy + 2y2) - (-9x2 - 4xy - 7y2)

5x2 + 4xy - 5y2

-5x2 - 4xy + 9y2

13x2 + 12xy + 9y2

13x2 - 12xy + 5y2

Which best describes a triangle with angles measuring 60 degrees, 40 degrees, and 100 degrees? A. ambiguously defined B. nonexistent C. a unique, acute triangle D. a unique, right triangle

Kirk's average driving speed is 5 kilometers per hour faster than Thor's. In the same length of time it takes Kirk to drive 525 kilometers, Thor drives only 490 kilometers. What is Kirk's average speed?

What is the solution to this equation? 5 х+9 - 3 х = 18 + 15 А. x = 8 B. х = 3 с. х = 12 D. x = 21

3 in to 2 ft in simplest form

Solve the following problems. You may use a calculator. A firm produces 16,200 units at a total cost of $37,585.60. Find the cost per unit to the nearest cent. IF someone could talk me through this to get the answer that would be great.

How do you get 2/3 + 7/2 into 25/5.

What is the square root of 88 plus (+) the square root of 95? Show work/explanation, if there is just the answer I will not mark brainliest.

A computer normally sell for $1299.00 but is discounted 10% a) what is the discount amount? B) what is the sale price? C) if the sales tax is 7% what is the price after tax

What is the area of this figure? 5 yd 8 yd 12 yd 13 yd yd 18 yd

1 litre is approximately 1.75 pints, 1 gallon = 8 pints, calculate the approximate number of gallons that are equal to 48000cm3