Answer:
0.5
Step-by-step explanation:
0.42 x = 0.21
x=0.5
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%
ANSWER
C. 210
EXPLANATION
The given binomial expression is
Comparing to the general binomial expression,
we have
Since we want to find the coefficient of
Using the binomial theorem, the coefficient is
The correct choice is C.
Answer:
16 credits
Step-by-step explanation:
Divide $1218 by 12 to find out how much 1 credit costs. It's $101.50
Because he paid $1624 total for spring, you'll divide that by $101.50 because it's per credit.
1624/101.5 = 16 credits.
hope this is good enough
Geoff charges $1.25 more than Anne (27/3=9)-(31/4=7.75)