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3 years ago

I need help on this question please!

Mathematics

1 answer:

suter [353]3 years ago

8 0

Answer:

1.75x^2

Step-by-step explanation:

Area equals half the base times the height and the value is squared.

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The following table shows the cost for a person to go to the 4 - H Fair to go on a certain number of rides: Develop an equation

PtichkaEL [24]

In order to develop an equation, let's use the slope-intercept form of the linear equation:

$y=mx+b_{}$

Using the points (3, 13.5) and (5, 18.5) from the table, we have:

$\begin{gathered} (3,13.5)\colon \\ 13.5=3m+b \\ (5,18.5)\colon \\ 18.5=5m+b \end{gathered}$

Subtracting the second and the first equation:

$\begin{gathered} 5m+b-(3m+b)=18.5-13.5 \\ 2m=5 \\ m=2.5 \end{gathered}$

Now, finding the value of b:

$\begin{gathered} 13.5=3m+b \\ 13.5=7.5+b \\ b=13.5-7.5 \\ b=6 \end{gathered}$

So the equation that represents this table is y = 2.5x + 6

Looking at the options, the correct one is E (none of the above).

3 0

1 year ago

This summer the number of tourists in Salem increased 4.5 percent from last year's total of 426,000. How many more tourists came

olchik [2.2K]

Answer:

The total number of tourists in Salem this year is 445,170.

Step-by-step explanation:

It is given that the total number of tourists in Salem last year is 426,000.

This summer the number of tourists in Salem increased 4.5 percent from last year's.

Number of tourists increased is calculated as

$426,000\times \frac{4.5}{100}=19170$

Total number of tourists in Salem this year is

$426,000+19170=445,170$

Therefore the total number of tourists in Salem this year is 445,170.

6 0

2 years ago

To wash a window that is 4 meters off the ground, Rafi leans a 5-meter ladder against the side of the building. To reach the win

Andre45 [30]

Answer:

Base of the ladder is 3 meters away from the building.

Step-by-step explanation:

Let's use Pythagoras theorem to solve.

Pythagoras theorem says,

$a^{2} +b^{2} =c^{2}$

Here let horizontal distance is "a''

Vertical distance of window is 4 m

So, b=4

The Rafi leans 5 m ladder against the wall. So, c=5.

$a^{2} +4^{2} =5^{2}$

Simplify it

$a^{2} +16=25$

Subtract both sides 16

$a^{2} =9$

Take square root on both sides

a=±3

So, base of the ladder is 3 meters away from the building.

5 0

2 years ago

What are the domain and range of the exponential function below F(x)=3^x+2

mihalych1998 [28]

3 is the x
2 is the y

7 0

2 years ago

Question 1 (1 point)

Dafna1 [17]

Answer:

B) -2

Step-by-step explanation:

$\frac{25-(-15)}{-12-8} =\frac{40}{-20} =-2$

3 0

3 years ago