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Anettt [7]
3 years ago
13

Substitute x=6y-7 4x+y=-3

Mathematics
1 answer:
aliina [53]3 years ago
8 0

Answer:

x = -1

y = 1

Step-by-step explanation:

x = 6y - 7

4x + y = -3

substitute x for 6y - 7 in the second equation

4x + y = - 3

4(6y - 7) + y = -3

open the parenthesis

24y - 28 + y = -3

combine like terms

25y - 28 = -3

add 28 to both sides of the equation

25y - 28 + 28 = -3 + 28

25y = -3 + 28

25y = 25

y = 1

now that you know y is 1, substitute it back into either equation

x = 6y - 7

x = 6 * 1 - 7

x = 6 - 7

x = -1

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In order to develop a more appealing​ cheeseburger, a franchise uses taste tests with 9 different​ buns, 8 different​ cheeses, 4
Nesterboy [21]

Answer:

8,640 minutes

Step-by-step explanation:

<em>Re-read the question:</em> "How long would it take the test to eat all possible cheeseburgers?"

<em>What are they asking for?</em>

Answer: Total time test all possible burgers

<em>We can break down the answer into a multiplication:</em>

Total time to test all possible burgers =

<u>Time to test each burger</u> x <u>Number of possible burgers</u>

A) Time to test each burger is given - 10 minutes.

B) Number of possible burgers is essentially the total number of combinations of toppings you can have. The order of toppings doesn't matter, so this problem is called a "Combination Problem," as opposed to a "Permutation Problem" which is a problem when order matters.

<em>How do we solve Combination problems? </em>

<em>Just multiply the quantity of each option.</em>

Number of combinations of burger toppings = # bun types x # cheese types x # lettuce types x # tomato types

Number of combinations of burger toppings = 9 x 8 x 4 x 3 = 864

<em>Now plug this into the original equation</em>

Total time to test all possible burgers

= time to test each burger x number of possible burgers

= 10 minutes x 864 possible options

= 8,640 minutes

7 0
4 years ago
Point A is located at (4, 0) and is reflected in the x-axis. What are the coordinates of point A'?
Deffense [45]

Answer:

The point (4,3) reflected about the x axis,

=> The x remains the same, the y flips over the x axis to be negative

     (4,3) ==>> (4,-3)

 

The point (-3,-8) is reflected in the y-axis.

=> The y remains the same, the x flips over the y axis to be negative

     (-3,-8)==>>(3,-8)

 

The point (2,4) is reflected in the line x = -3.

=> The x remains the same, the y flips over the x= -3 line.

     Instead of reflecting over the x axis (or the x = 0) line

     and just being +4 or 4 above the x axis to -4 or 4 below the x axis

     you have +4 being 7 above the x= -3 line so you need

     7 below the x= -3 line or -10  SO

      (2,4)==>>(2,-10)

 

The point (a, b) is reflected in the line y = x

     Consider that the line x=y is a 45 degree diagonal.

     Imagine a point on the x axis at +3  i.e. (3,0)

     Imagine a line perpendicular to x=y from the point (3,0)

           (sorry there is no way to draw on here - try drawing it)

    The line would hit the y axis at (0,3)

    So you can see the x becomes y and y becomes x.

     (a,b)==>>(b,a)

 

For

ΔXYZ is defined by its vertices X(1,3), Y(-3,5), and Z(0, -5).

       ΔXYZ is reflected in the y-axis.

So for each of of the 3 points X, Y, and Z reflect them about

       the y axis the same way in the second example above

       and you will have the 3 new points X’,  Y', and Z’

 

The translation T: (x, y) → (x -2, y + 4) maps the point (2, -3) to

The translation T: (x, y) → (x + 3, y - 2) maps the point (-4, -3) to

     What you need to do here is just plug the values for X and Y into the translation.

     e.g. for T: (x, y) → (x -2, y + 4)  plug (2,-3) of x=2 y=-3 into (x -2, y + 4) and get the new values.

Step-by-step explanation:

Hope you like it !!!

5 0
4 years ago
The population of Oregon is about 3.8 million. The population of the whole U.S. is about 318.9 million. Approximately what perce
taurus [48]

Oregon would be about 12.567 percent.

Hundredths Rounding - 12.57

Tenths Rounding- 12.6

Ones Place Rounding- 13

8 0
3 years ago
In the parallelogram below, x=?
spin [16.1K]

Answer:

88

Step-by-step explanation:

69+23

180- that^

8 0
3 years ago
Read 2 more answers
How many solutions does equation 6x + y = -1 and -6x - 4y =4 have
murzikaleks [220]

Answer:

There are no solutions.

Step-by-step explanation:

When you solve for x in the first equation, you get x = (-1-y)/6. Plugging this value for x into the second equation gives you -4y = 4 + y, which has no solutions.

6 0
2 years ago
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