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marissa [1.9K]
3 years ago
10

How do i do this 2y=-x+8 4x-2y+18

Mathematics
2 answers:
Arisa [49]3 years ago
6 0

Answer: x=4/31y + -18/31

Step-by-step explanation:

Let's solve for x.

2y=−x+(8)(4)x−2y+18

Step 1: Flip the equation.

31x−2y+18=2y

Step 2: Add 2y to both sides.

31x−2y+18+2y=2y+2y

31x+18=4y

Step 3: Add -18 to both sides.

31x+18+−18=4y+−18

31x=4y−18

Step 4: Divide both sides by 31.

31x/31 = 4y-18/31

Answer: x=4/31y + -18/31

lyudmila [28]3 years ago
5 0

Answer:picture

Step-by-step explanation:

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16
Tanya [424]

Answer:

2.50

Step-by-step explanation:

Given

(x_1,y_1) = (-1,0.8)

(x_2,y_2) = (0,2)

(x_3,y_3) = (1,5)

(x_4,y_4) = (2,12.5)

Required

The rate of change (b)

The above graph is represented as:

y = ab^x

For: (x_2,y_2) = (0,2);

We have:

y = ab^x

2 = a * b^0

2 = a *1

2 = a

a = 2

For (x_3,y_3) = (1,5),

We have:

y = ab^x

5 = a * b^1

5 = a * b

Substitute a = 2

5 = 2 * b

Divide by 2

2.5 = b

b = 2.5

<em>Hence, the rate of change is 2.50</em>

7 0
3 years ago
Ells room measures 78 inches by 96 inches Sarah's room measures 66 inches by 108 inches they want to combine their rooms how lar
Tanya [424]
Let’s find the area of Ells room.
78•96
7,488
Let’s find Sarah’s room.
66•108
7,128
Now add their area together.
14,616 inches squared.
5 0
3 years ago
3x = 21, then x = ? please help i dont really understand and te answer choices are 7, 18, 6
Anna [14]

Answer:7

Step-by-step explanation:

Because 3x7=21.

6 0
3 years ago
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Let’s assume the 147 freshman maintained a 65% attendance rate during the first 4 week of school. If our next 4 week goal for at
shutvik [7]

Answer:

  • 12 students  

Step-by-step explanation:

If 65% equals 147

Then to maintain 70% there is a need for 5% more

<u>Which equals</u>

  • 5*147/65 ≈ 12 students
4 0
2 years ago
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Kruka [31]

Answer:

Step-by-step explanation:

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4 0
2 years ago
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