You have to do 3 2
--- + ---. You have to do 3 + 2 which is 5, and leave the
8 8 denominators the same, so the answer is 5/8.
Let us assume that x kg of 30% salt solution is mixed with (200-x) kg of 40% salt solution in order to obtain 200 kg of 37% salt solution.
We can set up a linear equation in terms of x by setting amount of total salt before mixing and after mixing equal to each other.

Therefore, 60 kg of 30% salt solution should be mixed with 140 kg of 40% solution.
Answer:
x = 5, x=-2
Step-by-step explanation:
The factors are x-5 and x+2:
Set each factor equal to zero and then solve each of them for x to find out what values of x make the polynomial equal to zero.
x-5 = 0 , x+2 = 0
x=0+5 , x=0-2
x=5 , x= -2....
Answer:
45
Step-by-step explanation:
Find the last side of the triangle using the Pythagorean theorem.

she needs 75 =10h=money per hour (so h=hour) +5= automatic tip
75=10h+5
75-5=10h+5-5
70=10h
70/10=10h/10
7=h