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patriot [66]
3 years ago
10

A diver was 40 feet below the surface of the water. A fisherman was casting off a dock right above the diver that was 12 feet ab

ove the surface of the water. How far apart are the diver and the fisherman?
A.
28 feet

B.
-52 feet

C.
-28 feet

D.
52 feet
Mathematics
1 answer:
Nesterboy [21]3 years ago
5 0

Answer:

The answer is D.

Step-by-step explanation:

It is D because they cannot be negative feet away and if the fisherman is 12ft above water and the diver is 40ft below than 40 + 12 = 52. Hope this helps.

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10. 2x + 7y = 1<br> 2x - 4y = 12<br> Solve for y
adoni [48]

Answer:

The solution for y = -1.

Step-by-step explanation:

Given:

2x\ +\ 7y\ =\ 1    ....(1)

2x\ -\ 4y\ =\ 12  ....(2)

So, to solve for y, first we solve for x in equation (2):

2x-4y=12

⇒2x=12+4y

Dividing both sides by 2,

⇒x=6+2y            

Now, substituting the value of x  in equation (1):

2x+7y=1

⇒2(6+2y)+7y=1

⇒12+4y+7y=1

⇒12+11y=1

⇒11y=1-12

⇒11y=-11

Dividing both sides by 11,

⇒y=-1

Therefore, the solution for y = -1.

7 0
3 years ago
Show that the equation x^3 + x -3 =0 has a solution between 1 and 2. That is the only information given
valentina_108 [34]

Answer:

Step-by-step explanation:

Given that:

f(x) = x^3 + x - 3 = 0

Since the given function is equal to zero, then the function :

f(x) = x^3 + x - 3

where;

x = 1 and

x = 2

f(x) = (1)^3 + (1) - 3 \\  \\ f(x) = 1 + 1 - 3 \\ \\f(x) = -1 < 0

f(2) =  x^3 + x - 3 \\ \\f(2) = (2)^3 + 3 - 3  \\ \\f(2) = 8 + 3 - 3  \\ \\f(2) = 11 - 3 \\ \\f(2) = 8 > 0 \\ \\

Thus; f(1) < 0 and f(2) > 0

8 0
3 years ago
the sides of a triangle have lengths s,s+4,and 3s write an expression that represents the perimeter of the triangle
mamaluj [8]
Perimeter of a poligon= sum of all sides.
Perimeter of this triangle=s+(s+4)+3s=5s+4

An expression that represents the perimeter of this triangle is:  5s+4
3 0
3 years ago
Find volume of the foam
Roman55 [17]

Answer:

35 cubic feet

Step-by-step explanation:

127 137

If you divide the foam into 2 rectangular prisms, you will get a rectangular prism with dimensions of 1 * 2 * 7, and another prism with dimensions of 1 * 3 * 7. You find the separate volumes of each, and get 14 ft^3, and 21 ft^3. You add these together to get 35 ft^3

8 0
3 years ago
the number of cars at a dealership dropped from 64 to 48 after a weekend sale.what is the percent of decrease in the number. of
Karo-lina-s [1.5K]

Answer: This is a quite simple problem. 64 to 48. This would mean

64 - 25%

Knowing this percentage it will equal 48

<em>Answer : 25%</em>

Hope this helped!


Step-by-step explanation:


3 0
3 years ago
Read 2 more answers
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