Answer:
Step-by-step explanation:
Let the number of ounces of
A = x
B = y
A scientist has two solutions, which she has labeled Solution A and Solution Each contains salt. She knows that Solution A is 40% salt and Solution B is 55% salt. She wants to obtain 90 ounces of a mixture that is 45% salt. How many ounces of each solution should she use?
Our system of equations is given as
x + y = 90.... Equation 1
x = 90 - y
40% × x + 55% × y = 45% × 90 ounces
0.4x + 0.55y = 40.5....Equation 2
We substitute 90 - y for x in Equation 2
Answer:
x=5,x=-5
Step-by-step explanation:
The screenshot below will explain the answer
The answer is FALSE because an inequality that can sometimes be equal or can where one number is greater than or less than a number.
EXAMPLE:
a = a
x > a
a < x
There can be 4 or 1 possible combinations of zeros
