Answer:
The juice drink contains 27mg of vitamin C.
Step-by-step explanation:
Since the recommended daily amount of vitamin C for children 9 to 13 years old is 45 mg, and a serving of a juice drink contains 60% of the recommended amount, in order to know how much vitamin C does it contain we have to do the following calculation:
45 / 100 x 60 = Vitamin C contained by the juice drink
0.45 x 60 = Vitamin C contained by the juice drink
27 = Vitamin C contained by the juice drink
The juice drink contains 27mg of vitamin C.
Direct variation
Explanation:
Given –2 + 4y + 2 = 8x.
To find the given expression –2 + 4y + 2 = 8x is direct variation or not.
If y varies directly as x, then y = kx.
If y varies inversely as x, then
⇒ –2 + 4y + 2 = 8x
Combine like terms together.
⇒ –2 + 2 + 4y = 8x
⇒ 4y = 8x
Divide both sides of the equation by 4, we get
⇒ y = 2x
Which is in the format of y = kx.
Thus y varies directly as x.
Hence, –2 + 4y + 2 = 8x is direct variation.
28 yd²
40 yd²
52 yd²
64 yd²