So, let's put the test scores in fractions. We need them to have a common denominator, so let's use 10.
5/10=b 2/10=a 3/10= c or below
I added up 5/10 and 2/10 and subtracted that from 10/10 because it represents the rest of the test scores. We need to find how many students are 3/10.
We could multiply 3/10 by 30. Or we could divide 30 by 10, and multiply that by 3. Either way, we get 9.
So, 9 students scored a c or below on the test.
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:
No. If you multiply 138 x 7 you will get 966. Which isn't a very close estimate at all.
One dozen = 12
3 dozens = 12*3 or 36
To make 36 cookies you need 4 eggs and 1/2cups of chocolate chips.
Ben wants to make 12 dozen or 144 cookies.
144/36 = 4
To find out how many chocolate chips and eggs he needs we can multiply the amount of chocolate chips and eggs it takes to make 3 dozen by 4 to find out how many chocolate chips and eggs he needs to make 12 dozen.
4 *4= 16 He will need 16 eggs
4*1/2= 2 He will need 2 Cups of chocolate chips.
55 students are on each bus.take 331 divide by 6 and it's 55 with a remainder of 7. The other 7 students are the remainder.