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kherson [118]
3 years ago
13

During a scuba dive, Lainey descended to a point 20 feet below the ocean surface. She continued her descent at a rate of 20 feet

per minute. Write an inequality you could solve to find the number of minutes she can continue to descend if she does not want to reach a point more than 100 feet below the ocean surface.
Mathematics
2 answers:
MatroZZZ [7]3 years ago
8 0
She can descend five minutes so that should help
Rainbow [258]3 years ago
8 0

Answer:

We know that she first descends 20 feet, and then she descends at a rate of 20 feet per minute. Basically, we have 20 feet which have to me summed with 20x, which expresses the ratio per minute, where x is minutes, and these terms cannot be more than 100 feet, so there are equal or less than 100 feet,

The expression would be:

20+20x\leq 100

If we solve this, we have

20+20x\leq 100\\20x\leq 100-20\\x\leq \frac{80}{20}\\ x\leq 4

Therefore, she cannot descent for more than 4 minutes.

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Jobisdone [24]

Answer:

Step-by-step explanation:

Using brackets will really help.

y = (x^2 + 4x + ... ) - 5       You are trying to complete the square. The square in this case is a trinomial that is squared.

To do that, you take 1/2 the linear term (4x)/2, drop the x (4/2), and square the result (4/2)^2. The number is 2^2 which is 4.

So far what you have is

y = (x^2 + 4x + 4) - 5  

Now you just can't add 4 without adjusting it somehow. If you do, the whole question will change it's value. Because you added 4 inside the brackets, you must subtract 4 outside the brackets.

What that means is 4  inside - 4 outside. So it looks like this

y = (x^2 + 4x + 4) - 5 - 4

Now you continue on

y = (x + 2)^2 - 9  The 4 combines with the 5 to make nine.

8 0
2 years ago
Member of car- sharing program pay a fee of $50 per month plus $7.68 for every hour they us a car. A members bill was $149.45 la
weeeeeb [17]
It would be 13 hours
6 0
2 years ago
What is 1/3 of 100%?
Andrej [43]
33.3333333333333333333333333333333333333(goes on forever)
7 0
2 years ago
What is the solution to the equation 1/4 X -1/8 equals 7/8+1/2 X?
vodomira [7]

Answer:

x=-4

Step-by-step explanation:

1/4x-1/8=7/8+1/2x

2x-1=7+4x

2x-4x=7+1

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7 0
3 years ago
L=53+D<br> What the is length of the road after 22 days ?
Savatey [412]
<h3>After 22 days the length of the road is = 75 units.</h3>

Step-by-step explanation:

Given,

L=53 +D         L = the length of road and D = number of day

After 22 days the length of the road is = (53+ 22)

                                                                    = 75 units

4 0
3 years ago
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