Answer:
correct students
-5+2x=15
2x=15+5
2x=20(divided by 2 both sides)
x=10
mistake students
-5+2x=15
-3x=15(divided by - 3 both sides)
x=-5
Answer:
SA = 156π
Step-by-step explanation:
The formula for surface area of a cylinder is
SA = 2πr² + 2πrh where r is the base radius, and h is the height.
We are given r = 6 and h = 7. Plug in those values and evaluate...
SA = 2π(6²) + 2π(6)(7)
SA = 2π(36) + 2π(42)
SA = 72π + 84π
SA = 156π
Answer:
A rectangular lot is 100 meters wide and 150 meters long.Give the length and width of another rectangular lot that has the same perimeter but a smaller area.
The rectangular lot is having length of 170 meters and width of 80 meters.
Step-by-step explanation:
Given:
A rectangle.
Length of the rectangle = 150 meters
Width of the rectangle =100 meters
So perimeter of this rectangle = 2 (width+ length)
And area of this rectangle =(width)(length)
- Perimeter =
=
= meters.
- Area =
=
= square meters.
Now we have to find an another rectangular lot which has the same perimeter but different area.
Note: Subtract 20 m from the width and add 20m length into the longer side. (We can try with another multiple of 10).
So,
The new width = 100-20 = 80 meters.
And the new length =150+20 = 170 meters.
Lets check the perimeter and its area.
The perimeter must be equivalent to 500 meters and its area be less than 30000 sq-meters.
- Perimeter =
=
= meters.
- Area =
=
= square meters.
Hence the rectangular lot with length 170 m and with 80 m proves to have same perimeter and smaller area.
The slope-point formula of a line:
We have:
Substitute:
4x+ 6= 18
4x= 12
x= 3
Okay, i found the x. It is 3
X A. 3-18= -16
X B. 3/6= 1/2
✓ C. 3/3= 1
X D. 3-6= -3
Answer: C