Answer: perimeter= 2m+22 units
Step-by-step explanation:
length= 2m+1
width= 10-m
p=2(l+b)= 2(2m+1+10-m)
p=2(m+11)
p=2m+22 units
Let's take one side of the two equal lengths as r
third side is s.
so the total perimeter is r + r + s
2r + s = 23
According to the statement of third side s,
5 less than twice the length of one of other
s = 2r - 5
we have 2 equations and 2 unknowns. so we can find out the values of those letters.
2r + s = 23
2r - s = 5
4r = 28
r = 7
s = 9
Therefore the third length will be equal to 9 cm.
Answer: y=-2x+9
Step-by-step: Subtract 2x from 2x+y=9 and get y=-2x+9
Answer:
Step-by-step explanation:
we know that
To find out how many square feet of outdoor carpet will we need for this hole, subtract the area of the triangle from the area of the rectangle
so
we have
substitute the given values