I need math help!:]]] algebra!?

Question

1.Write the solution set using interval notation.

2x + 20.5 < 5x - 5

a (8.5, )

b (-, 8.5]

c [8.5, )

d (-, 8.5)

2.Multiply.

(7x9)(2x3)

a -14x12

b -14x27

c 14x12

d 14x27

3. Multiply.

(5x - 1)2

a 25x2 + 1

b 5x2 - 10x + 1

c 5x2 + 1

d 25x2 - 10x + 1

4.Simplify.

If P(x) = 5x and Q(x) = -8x - 12, find P(x) Q(x).

a -40x2 + 5x

b -40x2 - 60x

c -40x2

d -8x2 - 60x

5.Multiply.

[(7x - 5) + 6y]2

a 49x2 - 35x + 25 + 42xy + 30y + 36y2

b 49x2 - 70x + 84xy - 60y + 36y2

c 49x2 - 70x + 25 + 84xy - 60y + 36y2

d 49x2 - 70x + 25 + 42xy + 30y + 36y2

6.Multiply.

(x + 9)(5x - 5)

a 5x2 + 40x + 40

b 5x2 + 40x - 45

c 5x2 + 38x - 45

d 5x2 - 45x + 40

7.Find an equation of the line. Write the equation in standard form.

Horizontal; through (-8, -7)

a y = -7

b y = -8

c x = -8

d x = -7

Answer 1

2. d

3. d

6. b

Answer 2

I&#039;m in math two grade levels higher (double excel), but I am still in summer vacation.

As a result, I just went for the easy ones (I could have solved the others, but it would take time. This is my summer break).

2. (D)

(7x9)(2x3)=378 &amp; 14*27 also equals 378.

6. (B)

just do it... 5x2+40x-45

7. (A)

All the points have to be like this==&gt; (x,-7)

Answer 3

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