you could write an equation or make a table.
It is 800 b because 40 times 20 ( half of 40 =800
I think this is how you solve this
Answer:

Step-by-step explanation:
A compound inequality is an inequality that combines two simple inequalities
we are given that

<u>solving</u><u> </u><u>x </u><u>for</u><u> the</u><u> first</u><u> equation</u><u>:</u>

add 4 to both sides:

divide both sides by 4 and since we are dividing both sides by a positive number the inequality won't swap

<u>solving</u><u> </u><u>x </u><u>for</u><u> the</u><u> </u><u>second</u><u> equation</u><u>:</u>

cancel 5 from both sides:

divide both sides by 9 and since we are dividing both sides by a positive number:

therefore by combining the equations we obtain:

hence,
our answer is A)
Answer:
y=15
Step-by-step explanation:
first, add 6 to each side. the equation is now 3y=45
simply divide 45 by 3 to get
y=15