Answer:
English to Algebra translation says that "four less than twice a number is 10" yields the equation 2N - 4 = 10 2N = 14 N = 7
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:
n = -4/5
Step-by-step explanation:
-3/4 n + 1/8 n= 1/2
use the rules of signs for multiplication
-3/4 n + 1/8 n= 1/2
multiply both sides 8
-6n + n = 4
collect like terms
-5n = 4
divide both sides by -5
n=-4/5
or alternative form
n=-0.8
