All categories

3 years ago

Simplify the following polynomial expression. 3x( 4x+5) -4 (-x-3) (2x -5)

Mathematics

1 answer:

Vikki [24]3 years ago

5 0

Answer:

20x^2 +19x - 60

Step-by-step explanation:

3x( 4x+5) -4 (-x-3) (2x -5)

Distribute

12x^2 +15x - 4 (-x-3) (2x -5)

FOIL

12x^2 +15x - 4( -2x^2 -6x +5x +15)

12x^2 +15x - 4( -2x^2 -x +15)

Distribute

12x^2 +15x +8x^2 +4x -60

Combine like terms

20x^2 +19x - 60

You might be interested in

I NEED HELP ASAP PLEASE SOLVE FOR X

Marina CMI [18]

ANSWER: x = 130°

EXPLANATION: You must add given angles and then subtract from 180°.

8 0

3 years ago

Natalie added 20 pieces of candy to a bowl. Two days later, half of the candy in the bowl is gone. If there are 14 pieces left i

Salsk061 [2.6K]

Answer:

8 pieces of candy

Step-by-step explanation:

Take the original amount of candy in the bowl to be $x$ .

It says that 20 pieces of candy were added, therefore there are $x+20$ pieces of candy in the bowl.

Half of the candy is gone, therefore $\frac{x+20}{2}$ pieces of candy are left in the bowl.

After half of the candy is gone, there are 14 pieces left, so we can say that $\frac{x+20}{2} =14$

Solve for $x$ :

$x+20 = 28$

$x=8$

8 0

3 years ago

How do i draw a decimal for example 0.26?

elixir [45]

First, you need convert the decimals into fraction

0.26 = 26/100 = 13/50

The next step would be drawing 50 small boxes on a piece of paper. Make it colorless.

The final stap would be giving 13 out of those 50 boxes with different color (such as black), and you're done

8 0

4 years ago

Read 2 more answers

Describe the graph of y = 3x and compare it with the graph of y = x,

kykrilka [37]

check math way

Step-by-step explanation: it helps more then here

7 0

3 years ago

Which ordered pair is a solution to the system of equations?

elixir [45]

I believe it would be (b) (-2,1)