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Kay [80]
2 years ago
5

I don’t understand how to find x

Mathematics
1 answer:
Yanka [14]2 years ago
7 0
C, bc you add up all x’s, which give you 4x. Then you add 0.5,1,1.5 together, which is 3.
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Solve the system using substitution<br> 8x+9y=15<br> 5x-2y=17
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8 0
3 years ago
What is the discriminant of the polynomial below 2x2 + 5x - 8?
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A car produces 53.9 tons of carbon dioxide over a 7 year period. Find its carbon footprint (tons of carbon dioxide per year).
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Answer:

carbon footprint

  7.7 tons

Step-by-step explanation:

Given that,

carbon dioxide produced by a car over 7 year period = 53.5 tons

To find,

carbon footprint <em>(tons of carbon dioxide per year)</em>

7 years ------> 53.5 tons

1 year   -------> 53.9/7 tons

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3 years ago
What is the formula for surface area
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6 0
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the perimeter of a rectangle is 55 inches. the ratio of the length to width is 7:4. use proportions to find the area of the rect
Leni [432]

Answer:

Step-by-step explanation:

let : x the length and y the width    .... ( x  > y and x ; y reals numbers )

the perimeter is : 2(x+y)

2(x+y) = 55...(1)

x/y = 7/4 ...(2)

by (2) : x = (7/4)y

subsct in (1) : 2( (7/4)y +y ) =55

(7/2)y +2y =55

multiply by 2

7y +4y = 110

11y = 110

y = 10

x = (7/4)(10)

x = 35/2

4 0
3 years ago
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