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Thepotemich [5.8K]
3 years ago
12

− 3x − 30 = 5x + 18

Mathematics
1 answer:
Mariana [72]3 years ago
6 0
In the second and third line, where 3x was taken off both sides. On the left -3x-3x should have given -6x.
3x should have been added to both sides in order to cancel out the -3x
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The length of a rectangle is twice its width. The Perimeter is 42 cm. Find the length of each side.​
lakkis [162]

Answer:

A) L = 2*W

B) 2L + 2W = 42

We'll put Equation A) into B)

2*2W + 2W = 42

4W + 2W = 42

6W = 42 cm

Width = 7 cm

Length = 14 cm

Step-by-step explanation:

4 0
3 years ago
Adam's father drove his car at a speed of 65.2 miles per hour to go to a business conference. If his trip took 1.8 hours, how ma
earnstyle [38]
Distance = speed * time

d = 65.2 * 1.8
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46.25 according to my calculator
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3 years ago
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Help ASAP can u explain a little too? (pls help if u don’t know it don’t answer pls) Thank You:)
larisa [96]
Since they are similar, the dimensions are in the same ratio. L1 = 5, L2 = 15, so they are in a 3:1 ratio. So if V1 = 60, then W1×H1 = 60/5 = 12
W2 must also be 3×W1 and H2 3×H1, and
3×3 = 9. So take 12×9 (W×H1×9) ×15 (L2) = V2
V2 = 12×9×15 = 1620 cm^3

Let me know the right answer when you find out!
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3 years ago
A computer purchased for $1,650 loses 19% of its value every year.
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A) a=the initial value ($1650)
b=1-percent of decrease (0.81 or 81%)
B) About 3 years
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3 years ago
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