Answer:
-0.5
Step-by-step explanation:
Average rate of a function f(x) in the interval a to b is given by
Average rate of change =
Here we are given a graph. From the graph we find out f value at end points
a=0: f(0) = 2: b=2:f(2) = 1
Substitute in the average rate of change formula to get
f(2)-f(0) =1-2 =-1
b-a = 2
Hence average rate of change = -1/2
=-0.5
(Negative value indicates the change is decrease. i.e. when x increases f decreases)
The cost of ipad = 699$
the markup = 30%
1% = 699/100 = 6.99$
30% = 6.99 x 3 = 209.7$
the markup = 209.7$
the total cost of the ipad = 699 + 209.7 = 908.7$
Answer:
Pam is 51.
Jan is 48.
Step-by-step explanation:
Pam is 3 years older than Jan so her age is x + 3 where x is Jan's age. When we add Pam's age and Jan's age, the sum equals 99.
So x + x+3 = 99. Solve for x.
2x+3 = 99
2x=96
x= 48
So Jan is 48 years old. This means Pam is 51.
Answer:
a) x = 3.0625m
y = 45.9375 m
b) A = 140.68359375 m²
Step-by-step explanation:
Let x be the length
Let y be the width
2x + 2y = 98
x + y = 49
y = 3(5x)
y = 15x
x + 15x = 49
16x = 49
x = 3.0625 m
y = 15(3.0625) = 45.9375
A = xy = 3.0625(45.9375) = 140.68359375