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Illusion [34]
2 years ago
5

Please help. Which number(s) below belong to the solution set of the inequality? Check all that apply. 9x > 117

Mathematics
1 answer:
lord [1]2 years ago
8 0

Answer:

A, d and e

Step-by-step explanation:

So take the numbers a multiply them by nine. if they are more than 117, then they are correct, but with D 9x13 is equal to 117 so it is part of the solution set.

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Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16
jenyasd209 [6]

Answer:

A.(4,0)

Step-by-step explanation:

APEX

7 0
2 years ago
Suppose a tank contains 400 gallons of salt water. If pure water flows into the tank at the rate of 7 gallons per minute and the
Strike441 [17]

Answer:

Step-by-step explanation:

This is a differential equation problem most easily solved with an exponential decay equation of the form

y=Ce^{kt}. We know that the initial amount of salt in the tank is 28 pounds, so

C = 28. Now we just need to find k.

The concentration of salt changes as the pure water flows in and the salt water flows out. So the change in concentration, where y is the concentration of salt in the tank, is \frac{dy}{dt}. Thus, the change in the concentration of salt is found in

\frac{dy}{dt}= inflow of salt - outflow of salt

Pure water, what is flowing into the tank, has no salt in it at all; and since we don't know how much salt is leaving (our unknown, basically), the outflow at 3 gal/min is 3 times the amount of salt leaving out of the 400 gallons of salt water at time t:

3(\frac{y}{400})

Therefore,

\frac{dy}{dt}=0-3(\frac{y}{400}) or just

\frac{dy}{dt}=-\frac{3y}{400} and in terms of time,

-\frac{3t}{400}

Thus, our equation is

y=28e^{-\frac{3t}{400} and filling in 16 for the number of minutes in t:

y = 24.834 pounds of salt

6 0
2 years ago
Gerald has a garden in the shape of a square. The area, in square feet,
victus00 [196]

Answer:

x - 3

Step-by-step explanation:

We know that the area of a square is length times width.

We also know that a quadratic can be factored:

(x - 3)²

So if each side is (x - 3), then when we do length times width, we get x² - 6x + 9. So our answer is choice D.

7 0
3 years ago
PLEASE HELP IM SO CONFUSED BY THIS
Yanka [14]
In a triangle, the three interior angles always add to 180°

m∠B = 180 - 30 - 80 = 70°

<span>D: 70</span>
4 0
3 years ago
I NEED HELP ASAP!!!!!
viva [34]

Answer:

1 is 12

2 is 1/2 and 3/4

3 is 802,083

4 is 96

5 is 23

6 is 2/3

3 0
3 years ago
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