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Rufina [12.5K]
3 years ago
10

Solve by completing the square! (will give brainlist for work).n ^ 2 + n - 30 = 0

Mathematics
1 answer:
Masja [62]3 years ago
8 0

Answer:

n = 5, -6

Step-by-step explanation:

Ur welcome

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Trong không gian với hệ tọa độ Oxyz, cho hai vectơ
Elodia [21]
The answer is 3 I think
3 0
3 years ago
Tom invests $10,000 in a savings account that offers 3.5 percent interest, compounded continuously.
Elena-2011 [213]
For the answer to the question above, I'm not sure if your question is incomplete or the data on your question is incomplete but I'll answer it anyway because some data are provided.

10,000(1+.035)^10
10,000(1.043)^10
10,000(<span>1.41059876062)
=</span><span>14,105.99

</span>14,105.99/.035
=<span>40, 3028.21</span><span>
I still hope that this helps</span>
5 0
4 years ago
3. Factor.
sleet_krkn [62]
It seems that some the work is already here, but I'd be glad to!! So for #3 which is 9x^2+15x, we can factor out both a 3 and an x (3x) so we know that 3x * 3x =9x^2 and 3x * 5 = 15x so once we take the 3x out of the equation, we are left with 3x(3x+5) and that's as far as you can factor.
For #4, we see that the common factor is 10m because 10m * 2n = 20mn and 10m * 3 = 30m so once we take 10m out of the original, it becomes 10m(2n-3)
For #5, this one the common factor is 4xy because 4xy * 2xy=8x^2y^2 and 4xy*x= 4x^2y and 4xy*3=12xy so once we take the 4xy out of the equation, it becomes 4xy(2xy-x-3)
Hope this helps!
5 0
3 years ago
Write a quadratic function f whose zeros are -3 and -8
Ivenika [448]

Answer:

y = x² + 11x + 24

Step-by-step explanation:

y = (x + 3)(x + 8)

Expand

y = x² + 8x + 3x + 24

Combine like terms

y = x² + 11x + 24

3 0
3 years ago
Calculate the surface area and show work :) please help me no links!!
eimsori [14]

Answer:

294 in.²

Step-by-step explanation:

I believe this figure is a rectangular prism.

------------------------------------------------------------------------------------

<u>Explain:</u>

To find the surface area of a rectangular prism, use this formula:

SA=2lw+2lh+2wh

              or

SA=2(lw+lh+wh)

l-length

w-width

h-height

A phrase I use to help remember this formula is:

LISA WILSON LOST HER WITCH HAT TWICE (2)

------------------------------------------------------------------------------------

<u>Solve:</u>

The length of this rectangular prism is 9 in.

This width is 10 in.

The height is 3 in.

Now, I will plug the numbers into the first formula.

SA=(2*9*10)+(2*9*3)+(2*10*3)=294 in.^2

------------------------------------------------------------------------------------

<u>Conclude:</u>

I, therefore, believe the area of this rectangular prism is 294 in.²

5 0
3 years ago
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