Answer:
19
Step-by-step explanation:
Using number line method:
-8+19=11
11+8=19
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.
Answer:
8
Step-by-step explanation:
3x24=72
4x20=80
80-72=8
Answer:
Since the screw is smaller than 3/4 mm and larger than 5/8 mm,
we can make an inequality from the given data
3/4 > x > 2.5/4
where x is the width of the screw
So since the value is greater than 2.5/4 and less than 3/4,
the approximate value will be the mean of the two values
(2.5/4) + (3/4) = 5.5/4 = 11/8 mm