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erik [133]
3 years ago
10

the students hold a carwash. They charge $5 per car. if they wash 23 card and use the funds to repay the school what remains of

their debt to pay back through fundraising
Mathematics
1 answer:
Dafna11 [192]3 years ago
8 0

the students will have $115. but your not providing much information.

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Which of the following is a diagonal matrix?
IRINA_888 [86]

A matrix is diagonal if

i\neq j \implies A_{i,j}=0

In other words, you want non-zero elements only when the indices of the row and the column are the same: the first element of the first row must be non zero, the second element of the second row must be non-zero, and so on. All other elements must be zero.

5 0
3 years ago
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Simplify. 32 + 5 × 2 − 8 A) −84 B) 8 C) 11 D) 20
navik [9.2K]

32 + 5 × 2 − 8

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42-8= 34

The answer should be 34 but I don't see it up there

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Kimora wants to put ribbon around her SQUARE picture frame. One side is 7 inches long. How much ribbon will she need? (hint: aro
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Answer is 28 inches.

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7 0
3 years ago
Me ayudan con esa ecuacion por sustitucion con la comprobacion pliss
attashe74 [19]
<span>1/2x+3y/4=5 => (1/2)x + (3/4)y = 5

1/5x+3y/2=2  => (1/5)x + (3/2)y = 2

Eliminate the fractional coefficients:  Mult. the first equation by 4 and mult. the second equation by 10:


2x + 15y = 20     

</span><span>Multiply the 1st equation by -1:

-</span>2x - 3y = -20
2x + 15y = 20 
-------------------
       12y = 0, so y = 0.  Then the first equation becomes  2x + 3(0) = 20, or
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Solution is (10,0).
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Can you insert a photo of the question please it would greatly help me answer this

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