Which property is shown? –7 + 0 = –7
a. distributive property
b. associative property of multiplication
c. commutative property of addition
d. identity property of addition
! this is for a unit test

OPTION D: Identity property of Addition.

Step-by-step explanation:

In addition, the identity element is the element, 'e' which when added to any element in the set does not alter the value.

We have, for an element 'a',

                                       a + e = a = e + a

So, here, 0 is added to -7 and the value is not changed.

i.e., - 7 + 0 = - 7

Hence, 0 is the identity element of addition.

Note that 1 is the identity element of multiplication.

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.

ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.