20 points! you can choose more than one answer (i already know the second one is right but i need one more that is equivalent) which of the following equations are equivalent to -2m - 5m - 8 = 3 + (-7) + m? 1) -15m = -4m 2) -7m - 8 = m - 4 3) -3m - 8 = 4 - m 4) m - 4 = -7m - 8 5)-8 - 7m = -4 + m 6)-8 - 3m = 4 - m

2 and 5 for sure. I think 4 is correct, but your teacher may not.

Step-by-step explanation:

The given expression reduces down to -7m - 8 = m - 4

1 cannot give -15m on the right. One seldom sees that mistake on .

3 does not do that. - 3m is not - 7m

4 has it's sides reversed. I would count it is right, others may not. I'm trying to say the left side is on the right side and the right side is on the left. That to me is OK.

5 is Ok as well the left is written as -8 - 7m which is -7m - 8. and with -4 and m

6 has been reduced on the left incorrectly. the right is it's signs backwards

2 4(?) and 5

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

1/3 + 1/5 = 8/15.

step-by-step explanation:

hope it