Directions: Simplify each algebraic expression by combining like terms.. Show all work. 1. 7x2 – 5x + 10x - 8x2 1 1 1 I 1 - 1 - - - - - - - - - - - 1 1 1 1 1 1 1 1 1 1 11 1 2. – 6a3 + 5a3 + 2a2- a2 = 1 3. - 4(x + 5) - 5(x - 1) 4. -a + 5b - 6a + 5(a + 1) - - 1 - 1 1 1 1 5. 18x4 - 3x - 2x3 + x2 - 10 + 6 . 8

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.

answer: the answer is one

step-by-step explanation:

pemdas, in this situation there is no parenthesis or exponents so you go to multiplication, 1x1=1, then division 1/1= 1 then addition 1+1=2 then subtraction 2-1=1

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours