Answer: 8.5 cups of flour.
Step-by-step explanation: So he first has 19/2 cups of flour, 19/2 cups of flour is the recipe, which is 9.5 cups of flour. He finishes the recipe with 17/2 cups left, which is 8.5 cups of flour.
Answer: 5
Step-by-step explanation:
AE is half of AC
2 (x + 2) = 5x - 11
2x + 4 = 5x - 11
+ 11 + 11
2x + 15 = 5x
- 2x - 2x
15 = 3x
/ 3 / 3
x = 5
Answer: 136 units squared
Explanation: 5*7=35, 5*7=35, 6*7=42, 1/2 of 4*24=12, 1/2 of 4*24=12
35+35+42+12+12= 136 units squared
So... the alloy with 5% titanium is ...some alloy :), so is a mixed metal and among its mix it has 5% of titanium, it has other metals, but only 5% is titanium.
that means that if the amount of it is say "x", then the amount of titanium in it will be 5% or (5/100) * x, or
0.05x.
now, the 25% titanium, is the same issue, if say a quantity of "y" will only have 25% of titanium, regardless of other metals, so in "y" there is 25% or (25/100) * y, or
0.25y.
so, we need a mixture that yields only a 13% alloy, or 13/100, and will be 100 grams, so the amount of titanium in it will then be (13/100) * 100 or 13.

how much of the 25% alloy will be needed? well, y = 100 - x.