Which expression represents twice a number, n, increased by 7?

2n + 7

Step-by-step explanation:

'2 twice a Number N' , Is 2n

'Increased By 7'  Add 7 .

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2n+7

Twice the number n = 2n

Increased by 7= Adding 7

So the answer would be 2n+7

-6 is the correct option from the above given options

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.