Answer:
first group = 33
second = 15
Step-by-step explanation:
Let size of second group = x
size of the first group = 3x - 12
x + 3x - 12 = 48
4x - 12 = 48
collect like terms
4x = 48 + 12
4x = 60
x = 15
Substitute for x in the equation for size of the first group
3(15) - 12 = 33
2x-8x+17 then all u have to do is solve the equation
Answer:
91in^2
Step-by-step explanation:
SA of base = 7x7 = 49in^2
SA of each triangle = 1/2 x 7 x 3 = 10.5in^2
SA of all 4 triangles = 10.5 x 4 = 42in^2
SA Total = 49 + 42.= 91inch^2
Let x be the mileage that will cost the same
37.95 + 0.4x = 42.95 + .3x
0.4x - 0.3x = 42.95 - 37.95
0.1x = 3
x = 30
Ans: 30 miles
Answer:
Slope is 9 and -2 is the y-intercept
Step-by-step explanation:
As an equation in slope-intercept form is written as y=mx+b where m is slope and b is its intercept on the y-axis.
If one writes a linear equation as a function of y, one can easily get slope which is coefficient of x and intercept, which is constant term.
As y= -9x is already in this form, we have its slope as -9 and intercept on y-axis is 0, that is if it passes through the line of origin.