Answer:
24
Step-by-step explanation:
since these are fairly small numbers it's easier to figure out. for each number just think of the 2 closest perfect square, for 10, the 2 closest perfect squares are 9 & 16, which means square root of 10 is more than 3 but less than 4,
14 also has the same perfect squares as 10, so 10&14 aren't possibilities
the closest perfect squares to 24 are 16 and 25
the square root of 16 is 4 and the square root of 25 is 5
that means root 24 is between 4 and 5
if you're confused just ask me & i'll try to explain it a different way ♡
Answer:
(a) How many grams of copper are in the resulting mixture?
= 160 grams
(b) What percentage of the resulting mixture is copper?
= 61.5%
Step-by-step explanation:
(a) How many grams of copper are in the resulting mixture?
From the question: Suppose that a certain alloy is made by mixing 70 grams of an alloy that contains 12% copper with 90 grams of pure copper.
The number of grams of copper in the resulting mixture = 70 grams + 90 grams = 160 grams
(b) What percentage of the resulting mixture is copper?
70 grams of an alloy that contains 12% copper = 70 × 12%
= 70 grams × 0.12
= 8.4 grams
The number of grams of copper in the resulting mixture = 160 grams
The percentage of the resulting mixture that is copper is
=( 8.4 grams + 90 grams of pure copper/160) × 100
= 98.4/160 × 100
= 61.5%
I think it would be A.
Maybe not because they are all negatives.
3/4x + 2 = 4 2/3<span>
x = -16/9
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A complex fraction is. Fraction at a whole number