Answer:
18
Step-by-step explanation:
Answer:
D is the answer
Step-by-step explanation:
We want a mixture of low-fat and whole milk to equal 32ounces
Therefore, we know one equation is:
l + w = 32
That 32 ounce mixture should be 2% butter fat
So the amount of butter fat we want is
2% of 32 = 0.64 ounces
At the same time, this mixture contains low-fat and whole milk, which contain 1% and 3.25% butter fat respectively.
therefore, the butter fat in low-fat and whole milk is 0.01l and 0.0325w respectively.
The coefficients are just the percentages in decimal form
Due to the law of conservation of mass,
The addition of these two should yield the final amount of butter fat, meaning the other equation is:
0.01l + 0.0325w = 0.64
#59)
Joe: 5a + 4b = 6 (1st)
Dawn: 3a + 6b = 6.3 (2nd)
Multiply 1st equation by 3 and 2nd equation by (-5) to eliminate a
15a + 12b = 18
-15a - 30b = -31.5
------------------------------Add
-18b = - 13.5
b = 0.75
substitute b = 0.75 into 5a + 4b = 6
5a + 4(0.75) = 6
5a + 3 = 6
5a = 3
a = 0.6
Answer: Apple cost 60 cents each and banana cost 75 cents each
#60)
Wesley and Brian have total 87 baseball cards.
W + B = 87
Wesley has 30 less than twice as many as Brian
W = 2B - 30 (2nd)
So
W + B = 87
2B - 30 + B = 87
3B = 117
B = 39
W + 39 = 87
W = 48
Answer: Wesley has 48 cards and Brian has 39 cards
Hope they help.
16, 048÷ 1/8
First you have to turn the 1/8 upside down and change the division into multiplication. So;
16,048 x8/1
This is the same as 16,048 x 8. And that is 128384. So the answer is 128384. Always know that when you are dividing fractions, the fraction being divided (fraction at the right) has to be turned upside down and the division changed to multiplication. Hope I helped.
