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Alina [70]
3 years ago
7

Simpifly (-5x2 - 3x - 7) + (-2x3 + 6x2 - 8)

Mathematics
2 answers:
ioda3 years ago
5 0

Answer:

-2x³ + x² - 3x - 15

Step-by-step explanation:

Simply combine like terms together:

-5x² - 3x - 7 - 2x³ + 6x² - 8

-2x³ + (-5x² + 6x²) - 3x + (-7 - 8)

-2x³ + x² - 3x + (-7 - 8)

-2x³ + x² - 3x - 15

BlackZzzverrR [31]3 years ago
3 0

Answer: -2x^3+x^2-3x-15

Step-by-step explanation:

As there is only addition and subtraction here, and the two groups of parenthesis are added, you can ignore the parenthesis.

Thus, simply combine like terms to get.

-2x^3+x^2-3x-15

Hope it helps <3

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. What is 6 8ths x 5? Draw a model of your choice to help you solve.<br><br> WILL GIVE BRAINIST
professor190 [17]

Answer:

The complete and simplified answer to the question what is 6/8 of 5 is:  

3 3/4

Step-by-step explanation:

You probably know that the number above the fraction line is called the numerator and the number below it is called the denominator. To work out the fraction of any number, we first need to convert that whole number into a fraction as well.

Here's a little tip for you. Any number can be converted to fraction if you use 1 as the denominator: 5/1

So now that we've converted 5 into a fraction, to work out the answer, we put the fraction 6/8 side by side with our new fraction, 5/1 so that we can multiply those two fractions.

That's right, all you need to do is convert the whole number to a fraction and then multiply the numerators and denominators. Let's take a look:

 

6 x 5/ 8 x 1  =  30 /8

In this case, our new fraction can actually be simplified down further. To do that, we need to find the greatest common factor of both numbers.

You can use our handy GCF calculator to work this out yourself if you want to. We already did that, and the GCF of 30 and 8 is 2.

We can now divide both the new numerator and the denominator by 2 to simplify this fraction down to its lowest terms.

30/2 = 15

8/2 = 4

When we put that together, we can see that our complete answer is:  

15/ 4

 

If you now simplifiy the COMPLETE anwser is:

3 3/4

7 0
2 years ago
The unit price for a Sundae ice cream is $400 , GCT is 8% calculate the cash price for ice cream
Trava [24]

Answer:

b

Step-by-step explanation:

7 0
3 years ago
Use an area model to solve. 1 3/4 X 2 1/2
Sauron [17]
I can give you the answer right of the top of my head here it is 1 and 3/4 x 2 and 1/2 is 4 and 3/8
4 0
3 years ago
Breanna works in the mall and her hours increase during busy shopping times of the year. Breanna has a plan to save $25 each wee
vesna_86 [32]
The math I used is probably not the quickest way, but for me, the easiest.
25*5=125  25+20=45  45*7=315  125+315=440  25*4=100  440+100=540  5+7+4=16
B is your answer.
5 0
3 years ago
Read 2 more answers
Solve for r.<br> 10 (r - 6) = -17<br> Enter the answer in the box.
Brrunno [24]

Answer:

4.3

Step-by-step explanation:

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6 0
2 years ago
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