How do you know that substitution give a you the answer to a system of equations

Fill in the blank in geometry you'll often be able to use deductive rules to

F (x) = 6x-2 and g (x) = 2x+4 find (f+g) (x)

Write a word problem that is solved by 43 : 5 = 8 R3, in which the remainder is the only part needed to answer the question.

6. Four airplanes from different airlines have crashed in the past two weeks. This terrifies Megan, who must travel on a plane. Her travel agent claims that the probability of a plane crash is minuscule. Who is correct and why?

A radio tower is located 300 feet from a building. From a window in the building, a person determines that the angle of the elevation to the top of the tower is 34 degrees and the angle of depression to the bottom is 24 degrees.

Sarah bought 3 1/2 pints of blueberries to make jelly. She ate 3/4 of a pint of berries on her way home. How many pints of berries does she have left to make jelly?

Janet saved $3500 in 2007. If each year after this she saves $750 more than the year before, how much will she save in 2012? (A) $5750 (B) $6500 (C) $7250 (D) $8000 (E) $8750

What do I get when I factorise 4x+8

What is the simplified form of 3a^4b^-2c^3? a. (81a^4c^3) / (b^2) b. (81a^4) / (b^2c^3) c. (3a^4) / (b^2c^3) d. (3a^4c^3) / (b^2) D What is - a^-2 if a = - 5? a. - 25 b. 25 c. - 1/25 d. 1/25 D What is (-m) ^-3n if m = 2 and n = - 24? a. 3 b. - 3 c.

ABCD is a parallelogram. if side AB=6x-10, side BC=4x-5, and side CD = 3x+5, find the value of x x=