A toothpaste company mailed a survey to 360 households. In the first two weeks, the toothpaste company received 45% of the surve
1 answer:
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Answer:
450 ounces
Step-by-step explanation:
We know that the cost of the mixture must be the cost of the everyday moisturizing lotion
plus the cost of the self-tanning lotion
, which means
.
The cost of any substance will be the cost per ounce of the substance (c), multiplied by the number of ounces (n), which means C=nc, so we have from the previous formula that we have:
But we also know that the number of ounces of the mixture must be the sum of the number of ounces of the everyday moisturizing lotion with the number of ounces of the self-tanning lotion, so we have
We want to calculate the number of ounces of the self-tanning lotion (), so we solve for that variable:
And substitute our values in this formula, to get:
The values of (x, y) are (-5, 1), if the equations and
are solved by elimination method.
Step-by-step explanation:
The given is,
................................(1)
.....................................(2)
Step:1
Equation (2) is multiplied by -1 ( Eqn (2) × -1 )
..................................(3)
Step:2
Substrate the equation (1) and equation (3),
( - )
After the Subtraction equation becomes,
Step:3
By using y value find value of x,
Step:4
Check for solution,
Both sides are equal so answer is corrected
Result:
The values of (x, y) are (-5, 1), if the equations and
are solved by elimination method.