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erastovalidia [21]

3 years ago

13

david earns $1.50 per hour more than peter. together, they earn $940 if they both work 40 hours in a week. how much money per ho

ur do david and peter earn?

1 answer:

Korolek [52]3 years ago

8 0

Answer:

469.25

Step-by-step explanation:

peter=x

david=x+1.50

x+(x+1.50)=940

x=940-x-1.50

2x=940-1.50

2x=938.5

x=938.5/2

x=469.25

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Rounded to the nearest 3 decimal places, what is the value of r for this data set?

bogdanovich [222]

Using geogebra (see attached), I get roughly r = 0.98886 which rounds to r = 0.989

Answer: 0.989

Side Note: The fact that r is very close to +1 means the data set has strong positive linear correlation. The points all fall very close to a line with positive slope.

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3 years ago

NEED ANSWER ASAP PLEASE!!!!

dexar [7]

Answer:

The correct answer would be D. y=2/3x+8

7 0

4 years ago

Abigail is putting tiles on a table top. She needs 48 tiles for each of 8 rows. Each row will have 6 white tiles.

almond37 [142]

I think its like this
each row has 6 white tiles
8 rows = 48 tiles
48 - 6 = 42
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8 0

3 years ago

During the first hour of operation the farm stand owner sold 15% of the apples he had. On the second hour he sold 20% of the rem

Gnesinka [82]

Answer:

22.95 kg

Step-by-step explanation:

Let's say the farm stand owner starts with x kg of apples.

During the first hour, he sells 15% of the apples:

0.15 x

This means he's left with 85% of the original apples. During the second hour, he sells 20% of the remaining apples:

0.20 (0.85 x)

= 0.17 x

He's sold a total of 15% + 17% = 32% of the apples, so he's left with 68% of the apples. Continuing the pattern, the apples sold during the third hour:

0.25 (0.68 x)

= 0.17 x

He's sold 49% of the apples and is left with 51%. The apples sold during the fourth hour:

0.30 (0.51 x)

= 0.153 x

If 0.17 x = 25.5, then x = 150. So the apples sold during the fourth hour is:

0.153 (150) = 22.95

6 0

3 years ago

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

pshichka [43]

Answer:

The amount they charged to wash a car is <u>$6</u> and vacuum a car is <u>$2</u>.

Step-by-step explanation:

Given:

Trisha and Byron are washing and vacuuming cars to raise money for a class trip.

Trisha raised $38 washington 5 cars and vacuuming 4 cars.

Byron raises $28 by washing 4 cars and vacuuming 2 cars.

Now, to find the amount they charged to wash a car and vacuum a car.

Let the amount charged for washing a car be $x.$

And the amount charged for vacuuming a car be $y.$

So, the total amount Trisha raised:

$5x+4y=38.$ .......(1)

And, the total amount Byron raised:

$4x+2y=28.$

Now, to get the amount they charged to wash a car and vacuum a car we use elimination method:

$5x+4y=38\\4x+2y=28......\times 2$

$5x+4y=38\\8x+4y=56$

$-3x=-18$

$3x=18$

<em>Dividing both sides by 3 we get:</em>

$x=6.$

<u>Amount charged to wash a car = $6.</u>

Now, putting the value of $x$ in equation (1) we get:

$5(6)+4y=38.$

$5\times 6+4y=38$

$30+4y=38.$

<em>Subtracting both sides by 30 we get:</em>

$4y=8.$

<em>Dividing both sides by 4 we get:</em>

$y=2.$

<u>Amount charged to vacuum a car = $2.</u>

Therefore, the amount they charged to wash a car is $6 and vacuum a car is $2.

5 0

3 years ago