What algebraic expression is, a to the 3rd power, increased by the product of 5 and c?

Mathematics

1 answer:

maks197457 [2]3 years ago

3 0

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If X2-26X+69=0 and if X-5>0 what is the value of X

denpristay [2]

Answer:

X=+260

Step-by-step explanation:

In the picture. I hope that it's a clear.

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At Kennedy school there are 37 girls and 36 boys in the third grade.How many students are in the third grade at Kennedy School?

zubka84 [21]

37 + 36 = 73

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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:

$3(\frac{y}{400})$