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Crazy boy [7]
3 years ago
7

Solving by factoring n^2+9n=-14

Mathematics
2 answers:
Dmitriy789 [7]3 years ago
7 0

Answer:

n = -2 ,-7

Step-by-step explanation:

factor and set each factor equal to zero.

IgorC [24]3 years ago
4 0

Answer:

(n + 7)(n + 2) = 0

Step-by-step explanation:

Set the equation equal to 0. Add 14 to both sides:

n² + 9n = -14

n² + 9n (+14) = -14 (+14)

n² + 9n + 14 = 0

Find factors of 14 & n, that, when combined, will equal 9n.

n² + 9n + 14 = 0

n               7

n               2

(n + 7)(n + 2) = 0

(n + 7)(n + 2) = 0 is your answer.

~

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Gelneren [198K]
V=LWH
SA=2(LW+LH+WH)
V=240
first check that they are 240 volume
multiply numbers they should equal 240

the first one (A) can be eliminated since the dimentions are the same and therefor the surface areas are the same

2nd one check so far

3rd one (C) 6*4*15=360 which is wrong so eliminate this one

4th (d) 12*6*5=360 which is not 240 so eliminate


answer is B
3 0
3 years ago
Ty is eight inches shorter than his brother reece. if ty is 42 inches tall, how tall is reece?
Vladimir [108]
Ty is 50in tall
8+42=50
8 0
3 years ago
Read 2 more answers
Subtract.<br> 5x – 6x+2<br> - 1-2x - x - 2)
adell [148]

Answer:

7x^2 -5x + 4

Step-by-step explanation:

5x^2 – 6x+2

- (-2x^2 - x - 2)

We got 5x^2 - (-2x^2) = 5x^2 + 2x^2 = 7x^2

-6x - (-x) = -6x + x = -5x

2 - (-2) = 2+2 = 4

So the equation would be 7x^2 -5x + 4

Hope this help :3

3 0
3 years ago
A little difficult question for me, it is multiple choice answer but my teacher taught this before the break. If anyone could he
Sever21 [200]
<h3>Answer: Choice D</h3>

Divide both sides of the first equation by 7, then add the result to the second equation

=======================================================

Explanation:

We can multiply both sides of an equation by the same number and the equation will be equivalent to the original.

For example, if we had  x = 5, then we could get 2x = 10 after multiplying both sides by 2. The reason they are equivalent equations is because the same x value is the solution for both equations.

We can also divide both sides of an equation by the same number and the two equations would be equivalent. We can go from 2x = 10 back to x = 5 when we divide both sides by 2.

----------

If we divide both sides of 7x - 21y = 14 by 7, then we end up with x - 3y = 2. Simply divide each term (7x,  -21y, and 14) by 7.

Because 7x-21y=14 and x-3y=2 are equivalent, this means we can replace the "7x-21y=14" with "x-3y=2"

--------

The new system would be

x-3y = 2

2x+3y = 11

From here you add straight down. Doing so will have the y terms add to -3y+3y = 0y = 0. After this point the y terms are eliminated and you can solve for x just like with any other equation of one variable.

7 0
3 years ago
Spiral Review:
polet [3.4K]

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first, how many cups in a gallon. 4 cups/quart, 4 quarts/gallon- 16 cups per gallon

144/16= 9 gallons

6 0
3 years ago
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