The diver is 15 feet below the surface of the water in 10 seconds after he entered the water and 90 feet below the water after 40 seconds. what is the rate of change?

270 seconds

Step-by-step explanation:You have to Add to get your answer.I'll show you how I got 270:

15+15=30

30+10=40

40+10=50

50+90=140

140+90=230

230+40=270

Your answer is:270 seconds

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x=18 and 18=x. *The answer must have negative sign.*

Explanation:

subtraction property of equality is subtracting the same number from both sides of an equation does not change the equation.

a-c=b-c

First, subtract by 3 both sides of an equation.

2x+3-3=39-3

Then, simplify by equation.

2x=36

Next, divide by 2 both sides of an equation.

2x/2=36/2

Finally, simplify by equation and it just gives us the final answer.

36/2=18

18*2=36

2*18=36

36/18=2

x=18 and 18=x

Hope this helps!

Thanks!

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