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sergiy2304 [10]
2 years ago
9

The morning low tide at the beach is 12 inches. After 6 hours, the afternoon high tide is 57 inches. What is the average number

of inches the tide changed per hour?
Mathematics
2 answers:
spin [16.1K]2 years ago
6 0

there is your answer. hope this helps

nignag [31]2 years ago
4 0

Answer:

7.5 inches per hour

Step-by-step explanation:

Given that:

Morning low tide at beach = 12 inches

Afternoon tide after 6 hours = 57 inches

Average number of inches tide changed per hour :

(Afternoon tide - morning tide) / number of hours

(57 inches - 12 inches) / 6 hours

45 inches / 6 hours

= 7.5 inches per hour

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2 years ago
Two school groups go to a roller skating rink. One group pays $243 for 36 admissions and 21 skate rentals. The other group pays
Masteriza [31]

Answer:

No

There are infinitely many solutions to the system.

{36x+21y=24312x+7y=81

Multiply the second equation by 3.

3(12x+7y36x+21y=81)=243

Subtract this new equation from the first equation.

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7 0
2 years ago
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Let f (x ) = 3x² - 4 and let g (x) = 2x + 1. <br> Find the value of f[g(2)].
stepan [7]

Answer:

The value of f[g(2)] is 71.

Step-by-step explanation:

We need to find f[g(2)].

The first step is finding f[g(x)]

We have that:

f(x) = 3x^{2} - 4

g(x) = 2x + 1

To find f[g(x)], the first step is replacing each x is f by g(x). So

f(g(x)) = 3(2x+1)^{2} - 4

Now we replace x by 2

f(g(2)) = 3(2*2+1)^{2} - 4 = 75 - 4 = 71

The value of f[g(2)] is 71.

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2 years ago
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Which of the following best describes the solutions to the inequality shown below?
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3 years ago
The equation is:<br><br>Answer: the number of labor was :
Brilliant_brown [7]

Answer:

  • equation: 1368 = 380 +52x
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Step-by-step explanation:

The desired equation will relate labor cost, parts cost, and total cost.

<h3>A.</h3>

The total cost is the sum of the parts cost and the product of labor hours and labor rate. We're told to use x to represent labor hours.

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<h3>B.</h3>

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  19 = x . . . . . . . . . . step 2, divide both sides by the coefficient of x

The number of labor hours was 19.

6 0
2 years ago
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