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Alexus [3.1K]
3 years ago
11

3x + 3y =15 and x = -3y -1

Mathematics
1 answer:
saul85 [17]3 years ago
4 0

Answer:

  (x, y) = (8, -3)

Step-by-step explanation:

You can substitute for x in the first equation:

  3(-3y -1) +3y = 15

  -6y = 18 . . . . . add 3 and simplify

  y = -3 . . . . . . . divide by -6

  x = -3(-3) -1 = 8 . . . . find x using the second equation

The solution to this system of equations is (x, y) = (8, -3).

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HHHHHHHHHHHHHEEEEEEEEEEEEEEEEEEELLLLLLLLLLLLLLLLLLPP
Naya [18.7K]

Answer:

the 1st answer is H, yw

Step-by-step explanation:

quadrant I is on the top right, quadrant II is on the upper left, quadrant III is on the bottom left, and quadrant IV is on the bottom right. H is located in the top left (quadrant 2)

7 0
3 years ago
How many ounces of a silver alloy that cost $4 an ounce must be mixed with 10oz of an alloy that costs $6 an ounce to make a mix
scoray [572]

Answer:

x = 52.5

Step-by-step explanation:

4x + 6(10) = 4.32(x + 10)

4x + 60 = 4.32x + 43.20

0.32x = 16.8

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5 0
3 years ago
Which of the following would be the last step in evaluating the problem 7+5(6-2)%2
salantis [7]

Answer:

7+5(6-2)%2

7+20%2

7+40%

7.4

5 0
3 years ago
Can someone please help meee
Mariana [72]

Answer:

Step-by-step explanation:

Ok so you are given the values of the slope-intercept form with m being the slope and b being the y-intercept. So since b is equal to -1 you want to plot a point at (0, -1) since that is the y-intercept (when x = 0). The next thing you want to do is look at the slope, which is essentially saying each time x increases by 5 the y-value decreases by 4 or in other words rise/run which is negative which is why you're going down. So from the point (0, -1) go forward 5 units and go down 4 units which should lead you to (5, -5) and the third point you can plot is by going backwards instead of forwards. So instead of every time x increases by 5 y decreases by 4 you're going to do the inverse. Every time x decreases by 5, y is going to increase by 4. So by doing this from the y-intercept (0, -1) you should go backwards 5 units and up 4 units which should lead you to (-5, 3). And then now just draw a line that goes through all those three points. Hope that helps :)

6 0
2 years ago
If you help me and explain how you got your answer you will get brainlisyt
Oksanka [162]

Answer:

36.72

Step-by-step explanation:

Take 60% of 61.20. That is the markup.

60% * 61.20 = 60/100 * 61.2 = 3672/100 = 36.72

The markup is 36.72

8 0
3 years ago
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