Answer:
P = 2x + 2y + 8
Step-by-step explanation:
The perimeter (P) of a rectangle is calculated as
P = 2(l + w) ← l is length and w is width , then
P = 2(x + 5 + y - 1) ← distribute parenthesis
= 2x + 10 + 2y - 2 ← collect like terms
= 2x + 2y + 8
120 seconds is 2 * 60s
60s is 1 minute, so 2*60s = 2 minutes
The mean is not the same thing as median
mean=78+81+85+87=331
mean=331/4=82.75
median is the middle number, but you have a par set of numbers, so your median will be the middle numbers 78,81,85,87 , which are 81+85=166, 166/2=83
83 is your median
Answer:
45 square meters
Step-by-step explanation:
we know that
The area of trapezoid is equal to
where
b1 and b2 are the parallel bases
h is the height of trapezoid (perpendicular distance between the parallel bases)
we have
substitute
