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NNADVOKAT [17]
3 years ago
10

2y +9 =x 9x- 8y=31 System of substitution

Mathematics
2 answers:
Ilya [14]3 years ago
6 0

Answer:

I have solve it in above picture

VLD [36.1K]3 years ago
3 0

Answer:

x = -1

y = -5

Step-by-step explanation:

9(2y+9) - 8y = 31

18y + 81 - 8y = 31

10y + 81 = 31

10y = -50

y = -5

2(-5) + 9 = x

-10 + 9 = x

-1 = x

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vfiekz [6]
2?------------------------
6 0
3 years ago
Please helpp due soon!! 10 points :)
zubka84 [21]

Answer:

2.3\:\mathrm{in^3},\\1.3\:\mathrm{fl\:oz}

Step-by-step explanation:

The volume of a cone with radius r and height h is equal to V=\frac{1}{3}\cdot r^2\pi\cdot h.

What we're given:

  • Since radius is half the diameter, r is 1.1
  • Height of 1.8

Substituting given values, we get:

V=\frac{1}{3}\cdot 1.1^2\pi \cdot 1.8=0.726\pi\approx \boxed{2.3\:\mathrm{in^3}}

Convert to fluid ounces using the conversion given in the question:

0.726\pi}\cdot \frac{0.554}{1}\approx \boxed{{1.3\:\mathrm{fl\:oz.}}}

5 0
3 years ago
456 divided by n=4.56
Arlecino [84]
To find this out, just divide 456, by the answer of 4.56
So once you divide that, you get 100.
So, n=100
CHECK:
456 divided by 100=4.56
~~~~~~~~~~~~~~~~~~~
Hope this helped :)
8 0
3 years ago
Read 2 more answers
PLEASE HELP ME WITH THANKS :)
Maurinko [17]

Answer

12855.04 ft³

Step-by-step explanation:

regular Octagon consists of 8 congruent triangles

B = (13.28 x 11) / 2 x 8=584.32

V = BH = 584.32 x 22 = 12855.04

8 0
3 years ago
Read 2 more answers
I don't get how to solve it
skelet666 [1.2K]
I don't know for a fact but I think k=1.125
8 0
3 years ago
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