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sattari [20]
3 years ago
10

4y^2-(-3y-(19y^2-4y))-(5+(-9y-5)) combine like terms

Mathematics
1 answer:
Nutka1998 [239]3 years ago
4 0
4y^2 - (-3y - (19y^2 - 4y)) - (5 + (-9y - 5)) =
4y^2 - (-3y - 19y^2 + 4y) -( 5 - 9y - 5) =
4y^2 - (-19y^2 + y) - (-9y) =
4y^2 + 19y^2 - y + 9y =
23y^2 + 8y <==
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268

Step-by-step explanation:

You would take 5356 and divide it by 20

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Which equation could be used to find x in AABC? *<br> A<br> 10<br> 320<br> B
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Step-by-step explanation:

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3 years ago
Savannah got her hair done. If it costs $120 and she tips her hairdresser 18%, how much tip will her hairdresser receive
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21.6

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Do  0.18 (18%) times 120

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the selling price of a certain video is $6 more than the price the store paid. If the selling price is $27, find the price that
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3 0
3 years ago
A stadium has 55,000 seats. Seats sell for ​$28 in Section​ A, ​$16 in Section​ B, and ​$12 in Section C. The number of seats in
salantis [7]
A=number of seats in section A
B=number of seats in section B
C=number of seats in section C

We can suggest this system of equations:

A+B+C=55,000
A=B+C                                      ⇒A-B-C=0
28A+16B+12C=1,158,000

We solve this system of equations by Gauss Method.

1             1              1               55,000
1            -1            -1                         0
28         16           12          1,158,000 


1             1              1               55,000
0            -2             -2             -55,000                                    (R₂-R₁)
0           12             16           382,000                                    (28R₁-R₂) 


1            1                1              55,000
0           -2              -2             -55,000
0            0                4               52,000                                     (6R₂+R₃)

Therefore:

4C=52,000
C=52,000/4
C=13,000


-2B-2(13,000)=-55,000
-2B-26,000=-55,000
-2B=-55,000+26,000
-2B=-29,000
B=-29,000 / -2
B=14,500.

A + 14,500+13,000=55,000
A+27,500=55,000
A=55,000-27,500
A=27,500.

Answer: there are 27,500 seats in section A, 14,500 seats in section B and 13,000 seats in section C.
3 0
3 years ago
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