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ratelena [41]
3 years ago
10

Solve the system of equations using the substitution method. x - 2y = -2 -4x + 3y = -5

Mathematics
2 answers:
umka21 [38]3 years ago
5 0

Answer:

x=16/5, y=13/5

Step-by-step explanation:

  1. Multiply by 4 on the first equation and get a new equation: 4x-8y=-8
  2. Plus the new and second equation: 4x-8y+(-4x+3y)=-8+(-5), and got -5y=-13, so y=13/5
  3. After getting y=13/5, substitute in the first equation, x-2*(13/5)=-5, and got x=16/5
djverab [1.8K]3 years ago
3 0
So do we solve both of them, or just one of them I’m confused.
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Mazyrski [523]

Answer:

B = 73°, c = 107°, d= 107°

Step-by-step explanation:

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8 0
3 years ago
suppose x and y vary inversely and y=10 when x=4. write a function that models the variation then find y when x =90
ankoles [38]
X = k/y
4 = k/10
k = 4 x 10 = 40
Thus, x = 40 / y

90 = 40 / y
y = 40/90 = 4/9
4 0
3 years ago
A rectangle has a length of x and a width of x
Delvig [45]

Answer: Yes, because remember there is 2 lengths and widths so x times 2 is 2x and x - 5 times 2 is 2x - 10, so 2x + 2x -10 = 4x -10, so it would be a reasonable answer.

Step-by-step explanation: Hope this helps! :)

7 0
3 years ago
The gas tank of Wendy’s car was 23 full. She used 16 of a tank of gas when driving to and from work. Which equation shows how fu
liberstina [14]

Answer:

The 3rd choice: 2/3 tank - 1/6 tank = 1/2 tank

Step-by-step explanation:

I assume those numbers are fractions.

The gas tank of Wendy’s car was 2/3 full. She used 1/6 of a tank of gas when driving to and from work. Which equation shows how full the gas tank is now?

We subtract 1/6 from 2/3. We need to use the common denominator 6.

2/3 - 1/6 = 4/6 - 1/6 = 3/6

Now we reduce 3/6.

2/3 - 1/6 = 1/2

Answer: 2/3 tank - 1/6 tank = 1/2 tank

7 0
3 years ago
You mow your lawn in 5 hours and earn $45. What is your hourly wage?
zvonat [6]
First you divide the total with the amount of hours you worked

45/5 = 9

9 is the amount of money you earn per hour

so your answer is $9 per hour


hope this helps
7 0
3 years ago
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