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SSSSS [86.1K]
3 years ago
9

Angles R and S are complementary. If angle R is = 4x - 20 and angle S = 6x - 7, then angle R measures ___ degrees.

Mathematics
1 answer:
Shalnov [3]3 years ago
6 0

Answer:

26.8°

Step-by-step explanation:

4x - 20 + 6x - 7 = 90

10x -27 =90

10x = 90+27

10x= 117

x = 11.7

so, the angle R = 4x-20 =4(11.7)-20

= 46.8-20 = 26.8°

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10n^3-25n^2-16n+40 I'm so lost on this please help
Mariulka [41]
I think you're factoring this...? You can do that by grouping here.  Put the 4 terms in groups of 2 and factor out the greatest common factor. What's left behind is a common binomial factor that can also then be factored out. Like this:
(10 n^{3} -25 n^{2})-(16n+40)
Factoring what we can out of both sets gives us this:
5 n^{2} (2n-5)-8(2n-5)
The 2n-5 is a common factor between both the sets of terms, which in turn can also be factored out:
(2n-5)(5 n^{2}-8)
I'm not exactly sure what you are doing with this, but we can keep factoring for the sake of completeness.  The 5 n-squared term can also be factored:
5 n^{2}-8=0 and 5 n^{2} =8 and n^{2} = \frac{8}{5} so n= \frac{ \sqrt{8} }{ \sqrt{5} }.  Simplifying that down its simplest is this:
n=+/- \frac{2 \sqrt{10} }{5}
So your three factors for that polynomial are
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6 0
3 years ago
Riley buys a swim pass for the pool in January. The first month costs $30. Each month after that, the cost is $20 per month.
Zanzabum

Answer:

you pay 240 dollars a year

Step-by-step explanation:

y=20x

x is 12

20*12=

240

6 0
3 years ago
Read 2 more answers
3) 18 + 9 + 19 x 19<br> I do not no how to do it
Degger [83]

Answer:

388

Step-by-step explanation:

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8 0
3 years ago
Read 2 more answers
What is 2k-8&gt;-12 in word form
Dmitriy789 [7]

Answer:

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Step-by-step explanation:

2k-8>-12

+8 +8

2k>-4

÷2 ÷2

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3 0
3 years ago
Joe has eaten 4/5 0f a pizz. jane has eaten 1/6 of a pizza how many times more pizza has joe eaten than jane
Svetradugi [14.3K]
Joe will have eaten 24/30
Jane will have eaten 5/30
24 / 5 = 4.8
Joe has eaten 4.8 times as much pizza as Jane.
7 0
3 years ago
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