The answer is 50% if you are just choosing between 2 cards and NOT the whole deck. Please mark most brainliest!
Answer:
Rational
Step-by-step explanation:
-9 ⅜ = -75/8
Every number which can be written in a fraction of integers is rational.
Integers can be negative too
Step-by-step explanation:
12x34= 408
5678x43= 244154
19x08= 152
12x0987545= 11850540
Answer:
they are just diffrent varibless of numbers
Step-by-step explanation:
Answer:
30%: 35 liters
50%: 35 liters
Step-by-step explanation:
The desired concentration is halfway between the concentrations of available solutions, so the mixture will be equal amounts of each.
35 liters of 30% acid and 35 liters of 50% acid must be used
_____
If you want to write an equation, it usually works well to let the variable represent the amount of the most concentrated constituent: 50% acid. Then the amount of acid in the final mix is ...
0.50x +0.30(70 -x) = 0.40(70)
0.20x +21 = 28 . . . . simplify
0.20x = 7 . . . . . . . . . subtract 21; next, divide by 0.20
x = 35 . . . . . . amount of 50% solution (liters)
70-x = 35 . . . amount of 30% solution (liters)
