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sergejj [24]
4 years ago
13

Isabella filled her pool with water at a constant rate.

Mathematics
1 answer:
Anon25 [30]4 years ago
6 0

Answer:

The size of Isabella's pool is 220 liters.

Step-by-step explanation:

Let the size of Isabella's pool be x liters, R be the rate of fill, t be the time of fill and V be the volume of water filled in the pool.

As the rate of fill is constant,

Therefore, volume of water filled in the pool can be given as,

V= Rt

Volume of water left is given as x-V=x-Rt

From the table,

Volume of water left after t=2 minutes is 184 liters.

So, x-R(2)=184\\x-2R=184 -------- 1

Volume of water left after t=12 minutes is 4 liters.

So, x-R(12)=4\\x-12R=4 ------------2

Multiply equation 1 by 6 and equation 2 by -1, we get

6x-12R=1104\\-x+12R=-4

Now, we add the above equations, we get

(6x-x)+(12R-12R)=1104-4\\5x=1100\\x=\frac{1100}{5}=220

Therefore, the size of Isabella's pool is 220 liters.

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Quadrilateral KMPT is dilated by a scale factor of 3/4 to create K'M'P'T'. The perimeter of quadrilateral KMPT is x units. What
777dan777 [17]

Answer:

B) \frac{3}{4} x units

Step-by-step explanation:

Let quadrilateral KMPT be a rectangle with dimensions 12 units by 8 units. Then its perimeter would be equal to:

Perimeter of a rectangle = 2 (l + b)

where: l is the length = 12 units and b is the breadth = 8 units. So that:

Perimeter of KMPT = 2 (12 + 8)

                               = 40 units

Dilating KMPT by a scale factor of \frac{3}{4} would create K'M'P'T' of dimensions; \frac{3}{4} × 12 units by \frac{3}{4} × 8 units. Thus, the dimensions of K'M'P'T' would be 9 units by 6 units.

Perimeter of K'M'P'T' = 2 (l + b)

                                  = 2(9 + 6)

                                  = 30 units

Comparing the perimeters of KMPT and K'M'P'T', the perimeter of K'M'P'T' would be  \frac{3}{4} × perimeter of KMPT.

Therefore, if the perimeter of KMPT is x units, then;

         perimeter of K'M'P'T' = \frac{3}{4} * x units

                                            = \frac{3}{4}x units

6 0
4 years ago
-37 ≥ n - 20 <br> What could n be??
sertanlavr [38]

Answer:

-78

Step-by-step explanation:

-78 - 20 = -98 which is less than -37,

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Brums [2.3K]
Its B! They have to multiply to get 96 and b is the only one that also adds to get 40
5 0
3 years ago
The illustration below shows the graph of y as a function of x.
Viefleur [7K]

Answer:

1). Increases

2). Slope = 4

3). Slope = -1

4). y = 4 when x = 5

Step-by-step explanation:

1). Initially, as x increases, y also increases. (Linear growth has been shown in the graph initially).

2). Afterward, the slope of the graph of the function is equal to 4 for all x between x = 3 and x = 5.

[Slope of the line passing through two points (3, 0) and (5, 4)

m = \frac{(y_{2}-y_{1})}{(x_{2}-x_{1})}

(x

2

−x

1

)

(y

2

−y

1

)

= \frac{4-0}{5-3}

5−3

4−0

= \frac{4}{1}

1

4

= 4 ]

3). The slope of the graph is equal to -1 for x between x = 5 and x = 9.

[Slope of the line passing through two points (5, 4) and (9, 0),

Slope = \frac{(y_{2}-y_{1})}{(x_{2}-x_{1})}

(x

2

−x

1

)

(y

2

−y

1

)

= \frac{4-0}{5-9}

5−9

4−0

= -\frac{4}{4}

4

4

= -1 ]

4). The greatest value of y is y = 4, and it occurs when x = 5. (From the given graph)

3 0
3 years ago
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