Answer:
Equation. An equation is a mathematical statement that two things are equal. It consists of two expressions, one on each side of an 'equals' sign.
Step-by-step explanation:
Answer: y = 0.45x + 21
Step-by-step explanation:
let x represent the number of minutes used in a month.
Let y represent the monthly cost for x minutes.
If we plot y on the vertical axis and x on the horizontal axis, a straight line would be formed. The slope of the straight line would be
Slope, m = (304.5 - 183)/(630 - 360)
m = 121.5/270 = 0.45
The equation of the straight line can be represented in the slope-intercept form, y = mx + c
Where
c = y intercept
m = slope
To determine the y intercept, we would substitute x = 360, y = 183 and m = 0.45 into y = mx + c. It becomes
183 = 0.45 × 360 + c
183 = 162 + c
c = 183 - 162
c = 21
The equation for the monthly cost is
y = 0.45x + 21
Answer:
4 miles
Step-by-step explanation:
15 min. / 1 mile = 60 min. / x miles
Cross multiply.
15x = 60
Divide by 15
x = 4 miles
Answer:
t= 3 years
Step-by-step explanation:
So far we have 2 useful relationships
and 
Now, clearing t
I apply logarithm
years
Done
