Answer:
So four times around the park equals 2.8 km. That means the following:
4 * ___ = 2.8
To find that unknown, that means we now have divide:
2.8 ÷ 4 = ____
Here, let me set it up for you:
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4|2.8
Step-by-step explanation: ur welcome
We can write equations, using x and y as the length and width:
xy=40
2x+2y=26
Divide the second equation by two to get:
xy=40
x+y=13
Thus, x=13-y.
We now have (13-x)x=40, so
![13x-x^2=40](https://tex.z-dn.net/?f=13x-x%5E2%3D40)
and
![x^2-13x+40=0](https://tex.z-dn.net/?f=x%5E2-13x%2B40%3D0)
Factoring, we get:
(x-5)(x-8)=0
So, x can be either 5 or 8 (and y will be the other option). Thus, the length and width are 8 and 5.
Answer:
4 whole days
Step-by-step explanation:
If he wrote 3 pages each day and he has to write 12 pages then it would take him 4 days.
Answer:
32 inches
Step-by-step explanation:
Assuming 76 inches is perimeter, we'll say that w is width
Length = 5w + 2
Perimeter = w + w + (5w+2) + (5w+2) = 76 inches
12w + 4 = 76
Subtract 4 on both sides
12w = 72
Divide 12 on both sides
w = 6
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If the width is 6, then 5w + 2 = 5(6) + 2 = 30 + 2 = 32
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Width - 6 inches
Length - 32 inches
Perimeter - 76 inches
integral of e^x (sinx +cosx)= e^x sin x + c