Which expression could be used to determine the area of the square?
2 answers:
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Answer:
Step-by-step explanation:
For this, you check to see if any of these variables are the same. There are two x's, and 2 y's. So, you have to multiply x and x, which gives you 2x, and since you multiply the y's it will give you y^2.
So the answer will be
Given Information:
Distance = 160 miles
Required Information:
Rate = r = ?
Answer:
Rate = r = 20 mph
Step-by-step explanation:
Recall that the rate is given by
Rate = distance/time
It is given that the same trip would have taken 2 hours longer if he had decreased his speed by 4 mph.
Mathematically,
Simplify the equation
Now we are left with a quadratic equation.
We may solve the quadratic equation using the factorization method
So,
OR
Since rate cannot be negative, discard the negative value of r
Therefore, the rate is