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d1i1m1o1n [39]
3 years ago
9

What is 9x+7y=-18 using substitution

Mathematics
1 answer:
wlad13 [49]3 years ago
4 0

7y=-9x-18

that is all I can do

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WILL MARK BRAINLIEST!!!!!! PLEASE SHOW ALL WORK NESSISARY!!! SHOW FULL SOLUTIONS!!!!!! THANKS AND GOD BLESS!!!!
Irina-Kira [14]

9514 1404 393

Answer:

  k = -1

Step-by-step explanation:

Put the given value of x in the equation, and solve the resulting equation for k.

  2(5 -3) +k(1 +2·5) = k - 5 - 1

  2(2) +k(11) = k -6 . . . . simplify a bit

  10k = -10 . . . . . . . . . . add -4-k to both sides

  k = -1 . . . . . . . . . . . . . divide by 10

The value of k is -1.

_____

<em>Check</em>

Use k = -1 in the original equation and solve for x.

  2(x -3) -(1 +2x) = -1 -x -1

  2x -6 -1 -2x = -x -2 . . . . eliminate parentheses

  x = 7 -2 = 5 . . . . . . add x+7; answer checks OK

8 0
3 years ago
Your birds drink 8 1/3 ounces of water a day. How many ounces of water do they drink in 6 days?​
Novay_Z [31]

50 ounces

hope it helps...!!!

6 0
2 years ago
Max has a monthly salary of $1,100 and also earns 7.5% commission on his sales. If Max had $43,000 in sales last month, what wer
gizmo_the_mogwai [7]
I believe the answer is 4325. 
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3 years ago
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Which is greater 7500,000 m or 750 km
marta [7]

Step-by-step explanation:

both are equal

pls Mark brainliest

5 0
3 years ago
The shower block on the campsite has an area of 144 m2 The length of the shower block is 24 m.What is the width?
g100num [7]

Since the shower block is in the form of a rectangle. The shower block has an area of 144m^{2}. It has a length of 24m. We need to calculate the width of the shower block.

Area of rectangular shower block = length \times width

144m^{2} = 24 m \times width

width = = \frac{144m^{2}}{24m}

width = 6m

So, the width of the shower block is 6 meters.

8 0
3 years ago
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