18) Value of b is : 
Option A is correct.
19) Option C is correct.
Step-by-step explanation:
18) We need to find the value of b.
The given equation is:

Solving to find the value of b:

So value of b is : 
Option A is correct.
19) We need to find the correct graph of the equation:

Solving:

The values of y will be less than three. As y < 3 so, the circle on y is not filled.
So. Option C is correct.
Keywords: Solving Inequalities
Learn more about Solving Inequalities at:
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Answer:
Each interior angle of a pentagon equals 108 degrees.
Therefore Angle U = 108 degrees.
The angle of the square is 90 degrees.
Therefore, Angle x = 360 - 108 -90 degrees = 162 degrees!
Step-by-step explanation:
Answer:
1 week
Step-by-step explanation:
<u><em>The correct question is</em></u>
Amira has 3/4 of a bag of cat food .Her cat eats 3/4 of a bag per week . How many weeks will the food last ?
we know that
To determine how many weeks her food will last, we take the amount of food and divide by how much she feeds her cats.
3/4 bag ÷ 3/4 bag per week

Multiply in cross

The answer is
When x = 4
Y = 4
Maybe the answer is correct