Answer:
The term was obtained by grouping and adding the all x terms in the expression.
Step-by-step explanation:
The example has already provided this step:
(x -4) +(x +1) +(¼x +5)= 
Thus, the question is asking how is 
derived from the expression.
The attached picture shows the intermediate working to arrive at the final perimeter expression.
This expression is later equated to 20 since it is given that the perimeter of the traingle is 20 inches.
Answer:
f(x)^-1 = 
Step-by-step explanation:
f(x) = (4x - 3) / 7
y = (4x - 3) / 7
x = (4y - 3) / 7
x / 7 = 4y - 3
x/7 + 3 = 4y
y =
Distance travelled in heavy traffic = 40*1 = 40 miles
in light traffic = 60*2 = 120 miles
In total, he travelled = 40+120 = 160 miles
Answer:
3.125
Step-by-step explanation:
Kate walks 5 miles in 2 hours (120 minutes)
The distance she can works in 1 hour 15 minutes can be calculated as follows
This can be calculated using proportion
d/75= 5/120
Cross multiply
d×120= 75×5
120d= 375
d= 375/120
= 3.125
