We simply need to plug in x = 4 into x² + 2x
So plugging in x = 4, we get:
4² + 2(4)
Simplifying it, we get:
16 + 2(4)
16 + 8
24
When x = 4, x² + 2x will equal 24.
D
the 3:6 can be simplified to 1:2
the 4:8 can also be simplified to 1:2
Answer:
x = plus or minus 4
Step-by-step explanation:
Let's first simplify this equation by dividing both sides by 3:
3x^2 48
------- = ------ becomes x^2 = 16
3 3
Taking the square root of both sides of x^2 = 16, we get x = plus or minus 4.
It has 4 faces
first=30
second=30
third=20
fourth=20
surface area=120
Step-by-step explanation:
2x + 3 = x- 4
2x-x = -4-3
x = -7
