Answer:
-10x + 38.
Step-by-step explanation:
-2(x - 3) + 4(-2x + 8)
= -2x + 6 - 8x + 32
= -10x + 38.
Let's call the width . Since the length is three more than the width, it is .
The area (which we know to be 70) is given by the multiplication of width and length:
To solve this equation, you can use the usual quadratic formula: given an equation , the two solutions are
which in your case becomes
So, two solutions are
Since we can't accept a negative length, we only accept the second solution.
So, the dimensions are 7 and 10
Answer:
1/2 and 1/5.
Step-by-step explanation:
Two quarters would be 50/100 or 1/2 simplified.
Two dimes would be 20/100 or 1/5 simplified.
First off you need to take the square root of both sides and it leaves you with (x)(2x)= 15 then you multiple the x and it gives you 2x^2=15 then you divide by 2 and it gives you 7.5 then you take the square root of that to cancel the x^2 and it gives you x=2.7