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8090 [49]
3 years ago
13

PLZZZ I NEED HELP ON C IM ON A QUIZ

Mathematics
1 answer:
kvv77 [185]3 years ago
5 0

Answer:

150

Step-by-step explanation:

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What is the solution to the system of equations?<br><br> I will mark the brainliest answer
Stolb23 [73]
Ok so let us label our equations first
1- 3x+2y+z=7
2- 5x+5y+4z=3
3- 3x+2y+3z=1
subtracting equation 3 from equation 1
3x+2y+3z=1
(-). 3x+2y+z= 7
----------------------
2z=-6----->z=-3
since we already chose equation 1 and 3 we must involve equation 2
substituting the value if z in the second equation
5x+5y-12=3
5x+5y=15
choosing either the first or the third
3x+2y-3=7
3x+2y=10
solving the system
5x+5y=15
3x+2y=10
multipling the first equation by 2 and the second equation by 5
10x+10y=30
15x+10y=50
subtracting the two equations
-5x=-20--->x=4 substituting for the value of x
40+10y=30--->10y=-10y--->y=-1
so our soultion is x=4,y=-1,z==-3 or (4,-1,-3)








3 0
3 years ago
What is the equation of the line shown in this graph
ivanzaharov [21]

Answer:-6/1

Step-by-step explanation:

4 0
3 years ago
3/10n = 4/5<br><br> what value of n will make this equation correct?
kirza4 [7]
3/10n = 4/5

n = (4/5)/(3/10)

n = 4/5 * 10/3

n = 8/3

n = 2 2/3
4 0
3 years ago
10.B. What number do you need to add/subtract/multiply/divide each side by in
Sindrei [870]

Step-by-step explanation:

step 1. m + 7.02 = 6.32

step 2. m = -0.70. (subtract 7.02 from each side)

5 0
3 years ago
Jeff bought a new car $10,450. He know this car's value will decrease by 20% each year. Jeff writes the following function to mo
Irina18 [472]
I think the answer is 0. The car will have no value
5 0
3 years ago
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