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seropon [69]
4 years ago
12

2X + 5y = -13 3x - 4y = -8

Mathematics
1 answer:
almond37 [142]4 years ago
3 0
Answer:

You will need to use simultaneous equations.

Method:

First we need to make one set of variable the same, in this case we will:

-Multiply the top equation by 3 to get 6x
-Multiply the bottom equation by 2 to get 6x

The result will be as follows:

1) 2x+5y=-13 x3
1) 6x+15y=-39

2) 3x-4y=-8 x2
2) 6x-8y=-16

Now we will make both equations equal to 6x:

1) 6x=-15y-39
2) 6x=8y-16

Now because they both equal 6x, they therefore equal each other:

-15y-39=8y-16
-23=23y
y=-1

Now that we have y, we can substitute it back into one of the equations to get x:

1) 2x+5(-1)=-13
2x-5=-13
2x=-8
x=-4
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adelina 88 [10]

Answer:

Not a right triangle

Obtuse isosceles triangle.

Sides: J = 3.606   K = 6   L = 3.606

4 0
3 years ago
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Whats the answer to this? Please help.
BaLLatris [955]

Answer:

The answer is just 1 and 3.

Step-by-step explanation:

To understand this problem, you must think of what whole numbers actually are.

Whole numbers consist of Positive integers and Zero.

Positive integers include 1, 2, 3, 4, 5, 6, ... etc

Zero is 0

The reason \frac{23}{5} isn't a whole number is because that fraction doesn't reduce any further and does not yield a whole number.

7 0
3 years ago
a line with a slope of 3 passes through the point (2,5) write an equation for this line in point-slope form.​
Bingel [31]

Answer:

Point Slope: y - 5 = 3 (x-2)

Slope Intercept : y=3x-1

Step-by-step explanation:

1.) y - 5= 3(x-2)

2.) y - 5 = 3x-6

3.) y=3x-1

4 0
3 years ago
Abby went to the store to buy ice cream for her party. Each box costs $3. She has a coupon for 20% off her total. If Abby buys 3
ollegr [7]

Answer: 7.2$

hope it helps :)

step-by-step explanation:

Cost of each box = 3$

Cost of 3 boxes without 20% coupon = 9$

With 20% off Coupon = 9 by 100 multiplied by 20

                                     (the zero's cut with each other leaving)

                                     = 9 by 10 multiplied by 2

                                     (9 multiplied by 2 = 18)

                                     = 18 by 10

                                     (18 divided by 10 = 1.8)

                                     = the 20% of 9$ is equal to 1.8

                                        when subtracted with the total cost leaves 7.2$

4 0
3 years ago
HELP URGENT‼️‼️
olchik [2.2K]

Answer:

The answer is 3 cups of orange juice.

Step-by-step explanation:

So basically it says every 1/4 cup of water, you need 3/4 cups of orange juice. Now, 1 cup of water is the same thing as 4/4 cups of water. To get to 4/4 from 1/4, you need to multiply 1/4 by 4. Because of that, you need to multiply 3/4 by 4 as well. 3/4 * 4 is 3, and that's how you get your answer.

3 0
3 years ago
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