Answer:

Step-by-step explanation:
Given

Required
Simplify the expression

Express the square root of 121 as 11


Express 90 as 9 * 10

Split the surd to 2

Express the square root of 9 as 3



Hence, the result of the expression is

Answer:
The slope is -4.
Step-by-step explanation:
Slope formula:


Therefore, the slope is -4, and the correct answer is -4.
Hope this helps!
2a + 2c - 5b - c - b
2a + c - 5b - b
2a - 6b + c
Answer:
(-1,-6)
Step-by-step explanation:
Answer:
Solving
we get 
Step-by-step explanation:
We need to find solution of 
Solving the inequality:

Multiply 6 with terms inside the bracket

Subtracting 12 on both sides

Adding 4x on both sides

Divide both sides by -2 and the inequality will be reversed i.e < will be changes to >

So, after solving
we get 