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Juliette [100K]
3 years ago
9

How do I solve this Y= -8x+56 2x+2y=56

Mathematics
1 answer:
Deffense [45]3 years ago
7 0
Y  = -8x + 56
2y= -2x + 56 (you want to get rid of one variable then solve for it then solve for                         the other)

-2(y=-8x+56)
2y=-2x+56

-2y=16x-112
2y=-2x+56     (see how multi the first equation by -2 gets the y's to cancel so                     can solve for x. Now sum up the equations)
0= 14x-56
x= 4

now plug x=4 into any original equation Y=-8x+56
Y = -8(4)+56
Y=24

hope this helps

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1+4=52+5=123+6=218+11=?
Nikolay [14]
1+4=5
2+5=7
3+6=9
8+11=19
hope this helped:)

4 0
3 years ago
Read 2 more answers
An object is moving at a speed of 7300 inches every 3 seconds. Express this speed in miles per day.
AleksAgata [21]

Answer:

Since there are 60 seconds in one minute, we can write this as 146,000 inches per minute. Since there are 60 * 60 = 3600 minutes in one day, we can write it as 525,600,000 inches per day. Since there are about 63360 inches in one mile, the answer is about 8295 miles per day.

4 0
3 years ago
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(03.02 MC)The number of pages that Ana, Hillary, Roger, and Juan can read in a day is shown below:
IgorLugansk [536]

Answer:

Juan

Step-by-step explanation:

The number of pages that Ana, Hillary, Roger, and Juan can read in a day is shown below:

For Ana

Ana read 15% of her 46-page book.

= 15% × 46 pages

= 6.9 pages

For Hillary

Hillary read 11% of her 72-page book.

= 11% × 72 pages

= 7.92 pages

For Roger

Roger read 12% of his 68-page book.

= 12% × 68 pages

= 8.16 pages

For Juan

Juan read 14% of his 69-page book.

= 14% × 69 pages

= 9.66 pages

The person who can read greatest number of pages in a day also means the person who read the highest number of pages in a day.

From the calculation above, that person in JUAN because she can read 9.66 pages of her book in one day.

5 0
3 years ago
How would you represent a situation that has more than 1 solution? What does the solution represent about that situation? Explai
taurus [48]

Answer:

You don't

Step-by-step explanation:

For starters there is only one answer to every math question if you get an answer make sure it is correct

8 0
3 years ago
Read 2 more answers
Drag the tiles to the correct boxes to complete the pairs. Match the systems of equations with their solutions.
Oksanka [162]

Answer:

See explanation for matching pairs

Step-by-step explanation:

Equations

(1)

x - y = 25

2x + 3y = 180  

(2)

2x - 3y = -5

11x + y = 550  

(3)

x - y = 19

-12x + y = 168

Solutions

(-17,-36)

(47, 33)

(51, 26)

Required

Match equations with solutions

(1) x - y = 25 and 2x + 3y = 180

Make x the subject in: x - y = 25

x = 25 + y

Substitute x = 25 + y in 2x + 3y = 180

2(25 + y) + 3y = 180

50 + 2y + 3y = 180

50 + 5y = 180

Collect like terms

5y = 180-50

5y = 130

Solve for y

y =26

Recall that: x = 25 + y

x = 25 + 26

x = 51

So:

(x,y) = (51,26)

(2)  2x - 3y = -5 and 11x + y = 550

Make y the subject in 11x + y = 550

y = 550 - 11x

Substitute y = 550 - 11x in 2x - 3y = -5

2x - 3(550 - 11x) = -5

2x - 1650 + 33x = -5

Collect like terms

2x  + 33x = -5+1650

35x = 1645

Solve for x

x = 47

Solve for y in y = 550 - 11x

y = 550 - 11 * 47

y = 550 - 517

y = 33

So:

(x,y) = (47,33)

(3)

x - y = 19  and -12x + y = 168

Make y the subject in -12x + y = 168

y = 168 + 12x

Substitute y = 168 + 12x in x - y = 19

x - 168 - 12x = 19

Collect like terms

x -12x = 168 + 19

-11x = 187

Solve for x

x = -17

Solve for y in y = 168 + 12x

y =168-12 *17

y =-36

So:

(x,y) = (-17,-36)

4 0
2 years ago
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