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3 years ago

Need help!! What is the equation of the quadratic functions shown in the graph?

Mathematics

1 answer:

ValentinkaMS [17]3 years ago

7 0

Answer:

F(x)= (x+1)(X-3)

Step-by-step explanation:

Plug in the Zeros of the equation

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Trisha and Byron are washing and vacuuming cars to raise money for a class trip. Trisha raised $38 washington 5 cars and vacuumi

ANEK [815]

Answer:

They charged $6 for washing and $2 for vacuuming the car.

Step-by-step explanation:

Let the charge of washing a car be 'x'.

And also let the charge of vacuuming a car be 'y'.

Now according to question, Trisha raised $38 washing 5 cars and vacuuming 4 cars.

So framing the above sentence in equation form, we get;

$5x+4y=38\ \ \ \ \ equation\ 1$

Again according to question, Byron raises $28 by washing 4 cars and vacuuming 2 cars.

So framing the above sentence in equation form, we get;

$4x+2y=28\ \ \ \ \ equation\2$

Now multiplying equation 2 by '2', we get;

$2(4x+2y)=28\times2\\\\8x+4y=56\ \ \ \ equation\ 3$

Now we subtract equation 1 from equation 3 and get;

$(8x+4y)-(5x+4y)=56-38\\\\8x+4y-5x-4y=18\\\\3x=18\\\\x=\frac{18}{3}=6$

Now substituting the value of 'x' in equation 1, we get;

$5x+4y=38\\\\5\times6+4y=38\\\\30+4y=38\\\\4y=38-30=8\\\\y=\frac{8}{4}=2$

Hence They charged $6 for washing and $2 for vacuuming the car.

8 0

3 years ago

Micah made a scale model of the Empire State building.The building has an actual height of 381 meters. Micah’s model used a scal

Marysya12 [62]

Answer:

1cm = 50

2 cm = 50 x 2

3cm = 50 x 3

and the inverse:50m = 50/50 = 1cm

100m = 100/50 = 2cm

150m = 150/50 = 3cm

381m = 381/

3 0

3 years ago

Find the mean of the following: 158, 213, 107, 213, and 213. If needed, round your answer to the nearest tenth

Shalnov [3]

Answer:

180.8

Step-by-step explanation:

1. Add all the numbers

2. Divide the sum by 5

3. you get the answer

4 0

3 years ago

Read 2 more answers

HELP PLEASE, NO FILES OR LINKS PLEASE

Ne4ueva [31]

Answer:

Step-by-step explanation:

I am to determine the future value of Thomas' deposit with annual compounding

The formula for calculating future value:

FV = P (1 + r)^n

FV = Future value

P = Present value

R = interest rate

N = number of years

840 x (1.075)^5 = 1205.93

I am to determine the future value of Sherill's deposit in 5 years using simple interest

The amount that would be in the account = amount deposited + interest earned on deposit

interest earned on deposit can be determined by determining the simple interest

Simple interest = amount deposited x time x interest rate

1250 x 0.069 x 5 = 431.25

Amount that would be in her account after 5 years = 1250 + 431.25 = 1681.25

Sheril's money is higher by - 1681.25 - 1205.93 = 475.32

4 0

3 years ago

Solve for x. 0.71= 1/2(9.8) x^2.

Fudgin [204]

Answer: 0.38065

in simpler terms x=± 0.145 =±0.38065

Step-by-step explanation: -490x2+71 = 0

Subtract 71 from both sides of the equation :

-490x2 = -71

Multiply both sides of the equation by (-1) : 490x2 = 71

Divide both sides of the equation by 490:

x2 = 71/490 = 0.145

When two things are equal, their square roots are equal. Taking the square root of the two sides of the equation we get:

x = ± √ 71/490

The equation has two real solutions

These solutions are x = ±√ 0.145 = ± 0.38065

5 0

3 years ago