The value of y varies directly with x, where LaTeX: y=50y = 50 when LaTeX: x=40x = 40. Find the value of x when y is 10.
1 answer:
Answer:
x= 8
Step-by-step explanation:
The equation of direct variation is
y = kx
When y = 50 when x = 40
50 = k* 40
Divide each side by 40
50/40 = k
5/4 = k
The equation is
y = 5/4x
Let y = 10
10 = 5/4x
Multiply each side by 4/5
4/5 * 10 = 5/4 x * 4/5
8 = x
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54 rounded to the nearest 10 would be 50 because 54 is closer to 50 than 60.
So, the answer is 50.
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Answer: £54.60
Step-by-step explanation:
7.80 x 7 = £54.60
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