Answer:
26 minutes on the bicycle
Step-by-step explanation:
Let t and b represent the number of minutes on the treadmill and bicycle, respectively. The problem statement tells us two ways to relate these values.
t + b = 60 . . . . . Amy exercises a total of 60 minutes (1 hour)
9t +6.5b = 475 . . . . . she burns a total of 475 calories
Since we want to find the value of "b", we can use the first equation to write an expression that will substitute for t.
t = 60 -b
9(60 -b) +6.5b = 475
540 -2.5b = 475 . . . . . . simpify
-2.5b = -65 . . . . . . . . . . subtract 540
b = 26 . . . . . . . . . . . . . . . divide by -2.5 (equivalently, multiply by -2/5)
Amy spends 26 minutes exercising on the bicycle.
Answer:
D) 7.5 square units
Step-by-step explanation:
The area of a triangle is found by
A = 1/2 bh
The length of the base is (50) =5
The height is (4-1) =3
A = 1/2(5)(3)
= 15/2
= 7.5
Answer:
9
Step-by-step explanation:
the parenthesis first (2-8 ) = -6 then simplify 3-(-6) =9
Answer:
PLease
Step-by-step explanation: