Answer:
x=-200
Step-by-step explanation:
x/-10 -4 = 16
Add 4 to each side
x/-10 -4+4 = 16+4
-x/10 = 20
Multiply each side by -10
-x/10 *-10 =-10*20
x = -200
Answer:
84
Step-by-step explanation:
4 * 3 * 7 = 84
Answer: Yes
Step-by-step explanation:
When you rearrange the equation it would be y=-5x^2-4, and since it is a 2nd degree we can easily say it is a quadratic function.
Answer:
The width is 7 meters and the length is 13 meters
Step-by-step explanation:
The perimeter of a rectangle sandpit is 40 meters.
Let the width be w units, then the length which is 1 meter less than twice it’s width becomes: 
The perimeter of a rectangle is given by:

We substitute P=40 and the length in term of w to get:

We simplify to get:

Divide through by 2 to get:
Hence 
Looking at this, the unit of 1 length is equal to 2.5 units of width. To find 6 units of length, you just multiply 6 by 2.5. Getting this gives us 15. So your answer is C.