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
Choice A is one of the answers. Nice work. This is because x+x+x turns into 3x.
Choice D is the other answer because 2(x+1) + x = 2x+2+x = 3x+2. You can find this through trial and error. Or you could graph y = x+x+x+2 and y = 2(x+1)+2 to find that they are the same exact identical diagonal line. A non-graph approach would be to set up a table of values to see that the two tables are identical.
Distribution Property.
Step-by-step explanation:
8(x+4)
8x+32
Answer:
Jason would be 18 years old
Step-by-step explanation:
sister = 6
mother = 39
mother is 15 year older than the sum of the kids ages
39-15= 24
24-6= 18
Jason is 18 years old
Answer:
<h3><u>Solution</u><u>:</u><u>-</u></h3>
Let
Tinky's age=x
Laa's age=x+2
According to the question
