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Mrac [35]
3 years ago
11

Carly wants to buy 10 litres of

Mathematics
1 answer:
yuradex [85]3 years ago
4 0

Answer:

The correct answer is:

Home stores: £23.75

Paint Supplies: £27.30

The DIY Shop: £22.50

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What should be done to these equations in order to solve a system of equations by elimination?
morpeh [17]

Answer

You can multiply the first equation by 4 and the second equation by 3.

You can multiply the first equation by 4/3.

You can multiply the first equation by 3.

Explanation

When solving a system of equations by elimination, you want to add or subtract the equations to "get rid" of a variable.

To do that, one of the variables in both equations have to have the same coefficient.

The first answer possible gives x the coefficient of 12 for both equations. You would get 12x+4y=52 and 12x-9y=39. You could subtract those equations to get 13y=13.

The second way gives x the coefficient of 4. You would multiply the first equation by 4/3 to get 4x+4/3y=52/3. You can subtract to get one variable, and then solve from there. Although, multiplying for 4/3 is annoying, so it's not suggested.

You can also "get rid" the the y. Multiply the first equation by 3 to get 9x+3y=39. You can add these equations. When you add 9x+3y=39 and 4x-3y=13 you get 13x=52.

7 0
3 years ago
HELP PLZ.....I NEED THIS....One wheel of a bicycle has 24-inch diameter. About how many feet will the bicycle travel when the wh
Ne4ueva [31]
First, find the circumference of the wheel using C=2 \pi r

You know that your diameter is 24. To find the radius, divide the diameter by 2, which is 12.

Input 12 as r and simplify. ->  C=2 \pi (12)
C=24 \pi

estimate your Pi as 3.14
C=24(3.14)

and multiply. C=75.36

Now you know the distance of one full revolution in inches. To find 200 revolutions, multiply that answer by 200.

75.36 * 200 = 15,072 inches

But because this is in inches, you have to find the answer in feet, so just divide that answer by 12.

15,072 / 12 = 1,256 ft
7 0
3 years ago
For the function y=3x^2-12x+4 , what’s the mirroring point for the y-intercept? (x,y) form please
Slav-nsk [51]

Answer:

the you run y=3

Step-by-step explanation:

4 0
3 years ago
The reflection of a Quadrant II point is located in Quadrant I. Assuming no error was made, what kind of reflection occurred?
gizmo_the_mogwai [7]

Answer:

A reflection across the y- axis

Step-by-step explanation:

Under a reflection in the y- axis

a point (x, y) → (-x, y)

A point in the second quadrant (- x, y)

Under reflection in the y- axis is (x, y) ← point in first quadrant

3 0
3 years ago
Read 2 more answers
Plzzz help me math sucks <br> 84 + 45 = 3(28 + 15) No Yes
IRINA_888 [86]
Yes because 84+45 is 129 and 3(28+15) is 129
5 0
3 years ago
Read 2 more answers
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