Answer:
0=0
Step-by-step explanation:
6x-6x=0
cancel the terms on both sides of the equation
0=0 the sum of two opposites equals zero
this statement is correct
Answer:
x = -7 and x = 3
Step-by-step explanation:
x² + 4x - 21 = 0 factors as follows: (x + 7)(x - 3) = 0.
Then x = -7 and x = 3.
Answer:
the answer is D because "difference" is a key word for subtraction
Step-by-step explanation:
Answer:
Option D. A number line with an open circle on 4 with shading to the right and a closed circle on 10 with shading to the left
Step-by-step explanation:
we have

Divide the compound inequality into two inequalities
-----> inequality A
Multiply by -1 both sides

Divide by 5 both sides

The solution of inequality A is the interval ----> (-∞,10]
All real numbers less than or equal to 10
-----> inequality B


Multiply by -1 both sides

Divide by 5 both sides

Rewrite

The solution of the inequality B is the interval ----> (4,∞)
All real numbers greater than 4
The solution of the compound inequality is
(-∞,10] ∩ (4,∞)= (4,10]
All real numbers greater than 4 and less than or equal to 10
A number line with an open circle on 4 with shading to the right and a closed circle on 10 with shading to the left