Answer:
1. 39 km/hr
2. $235
3. 16
4. 7m+3 inches
Step-by-step explanation:
1. Original speed of car: x km
x+21=60
x=39
original speed: 39 km/hr
2. Amount that the freshman class raised: x
2x+85=555
2x=555-85=470
x=235
Amount that the freshman class raised: $235
3. Number: x
5x-9=71
5x=71+9=80
x=16
The number: 16
4.
3m+5+4m-2
= 3m+4m+5-2
=7m+3 inches
Answer:
y = -x - 8
Step-by-step explanation:
First, calculate the slope:
m = 
(x₁, y₁) will be (8, -16)
(x₂, y₂) will be (6, -14)
Plug in values:
m = 
simplify:
m = 
m = -1
plug values into y = mx + b:
-16 = (-1)(8) + b
solve for b:
b - 8 = -16
b = -8
rewrite the equation:
y = -1x - 8
y = -x - 8
Answer:
a)
There are 6 planes - 5 faces of the pyramid and one base, which overlaps with the plane X.
b)
<u>Collinear points are the points on the same line:</u>
c)
The intersection of planes X and HGD is the line section HG.
y=-4x-8
To find x-intercept / zero , substitute y=0
0=4x-8
Move <u>Variable</u> to the left-hand side and change its sign
-4x=-8
Divide both sides of the equation by -4
Answer: x=2
