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STALIN [3.7K]
3 years ago
14

Use substitution to solve the system

Mathematics
1 answer:
Doss [256]3 years ago
3 0

Answer:

x = 4, y = 16

Step-by-step explanation:

y = 4x\\y = 2x + 8\\\\4x = 2x + 8\\2x = 8\\x = 4\\\\y = 4*4\\y = 16

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Write the slope intercept form of the equation of the line through the given point with the given slope.
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Answer:

1) y = 2x-2

2) y = -6/5+1

Step-by-step explanation:

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Find the surface area of the rectangular prism.<br><br> HELP ME PLS ASAP PLS PLZ WITH BOTHE!
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Cube - 600 Rectangular Prism - 350

Step-by-step explanation:

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Rectangular Prism - A=2(wl+hl+hw)

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Debra has to decide on paint colors for her house. There is a 90% chance she will chose gray for the living room. There is a 70%
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Diego needs to put down sod on a yard that measures 30 feet by 45 feet. Company A says it can do the job for $3.90 per roll of s
N76 [4]

Answer:

Company B is the better deal. Diego will save $31.5.

Step-by-step explanation:

First, find the area of the rectangle: 45*30=1350 sq.ft.

Next, find out how much it will cost for Company A: $3.9 for 2 x 5 ft (10 sq.ft)

Divide 1350 by 10 to see how many of their sod rolls will fit into his yard=135.

Multiply $3.9 by 135=526.5$

Do the same with Company B: $150 for 450 sq.ft plus $45 delivery.

Dived 1350 by 450 to see how many rolls= 3

Multiply $150 by 3= $450, then add $45= $495

Subtract Company B's $495 from Company A's $526.5= $31.5 <-how much Diego saved.

7 0
3 years ago
What is the slope of the line through (- 1, - 7) and (3, 9) ?
Fynjy0 [20]

Answer:

C. 4

Step-by-step explanation:

<u>Use the slope formula:</u>

m=\frac{y2}{x2} -\frac{y1}{x1}

m = the slope.

<u>Substitute the values into the formula:</u>

\frac{9}{3} -\frac{-7}{-1} =\frac{?}{?}

<u>Solve:</u>

\frac{9}{3} -\frac{-7}{-1} =\frac{16}{4}

<u>Simplify 16/4:</u>

\frac{16/4}{4/4} =\frac{4}{1}=4

5 0
2 years ago
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