Answer:
The answer is A.
Step-by-step explanation:
Given that the formula of area of triangle is, A = (1/2)×b×h. Then substitute the following values into the formula :
b = 10 units
h = 4 units
A = (1/2)×10×40
= (1/2)×40
= 20 units²
Answer:
8x; x ≤ $23.75
Step-by-step explanation:
You have to buy 8 trains with 190 dollars. You can't use more money or have more trains.
8x ≤ 190
Divide by 8 on both sides.
x ≤ $23.75 per train
Your welcome!
Kayden Kohl
8th Grade Student
Answer:
It takes 20 weeks to empty the lake
Step-by-step explanation:
Some rate, let's call it
empties the lake in 10 weeks and a river (with rate
can fill the lake in 20 weeks. The idea behind the solution of this type of problem is always set the rate to the same units. Let's see this:
which implies that this rate empties 0.1 of the lake per week, thus,
.
Using the same idea, we can obtain that the filling rate of the river is:

Since both rates are acting at the same time, the total rate of flowing water (either in or out the lake) would be given by:
, which means that the lake is being empty at a rate of -0.05 week and using the rule of three:

Thus, It takes 20 weeks to empty the lake.
Answer:
x=-4/3y+100
Y=-3/4x+75
Step-by-step explanation:
The average rate of change over the interval is 2/9
<h3>How to determine the average rate of change?</h3>
The interval is given as:
-4 ≤ x ≤ 5
From the table, we have:
f(5) = 4
f(-4) = 2
The average rate of change is then calculated as:

This gives

Evaluate

Hence, the average rate of change over the interval is 2/9
Read more about average rate of change at:
brainly.com/question/23715190
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