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Bas_tet [7]
3 years ago
15

Solve 2x + 5y = –13. 3x – 4y = –8

Mathematics
2 answers:
disa [49]3 years ago
8 0
If you would like to solve 2x + 5y = - 13 and 3x - 4y = -8, you can do this using the following steps:

<span>2x + 5y = -13  /*4
3x - 4y = -8     /*5
</span>_________________
8x + 20y = -52
15x - 20y = -40
_________________
8x + 15x + 20y - 20y = -52 - 40
23x = -92    /23
x = -92 / 23
x = -4

<span>2x + 5y = -13
</span>2 * (-4) + 5y = -13
-8 + 5y = -13
5y = -13 + 8
5y = -5
y = -1

(x, y) = (-4, -1)

The correct result would be D.) <span>(-4, -1).</span>
Luden [163]3 years ago
8 0

After solving the equations 2x + 5y = –13 and 3x – 4y = –8, I got the value (–4, –1). The correct answer between all the choices given is the last choice or letter D. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

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John find 1/5 of the bar chocolate he bought was already eaten by his brother. He eat 3/4 of what was remaining. Find the portio
larisa86 [58]

Answer:

1/5 is left.

Step-by-step explanation:

Portion remaining after the bar was eaten by his brother = 1 - 1/5 = 4/5.

Portion remaining after John ate 3/4 of this = 4/5 - 3/4* 4/5 = 4/5 - 3/5

=  1/5.

3 0
3 years ago
If u evenly divide 3/4 of a pizza among 3 people. How much will each person get?
Dafna11 [192]
I’m pretty sure it’s 2 but i’m not 100 percent on that
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A biologist uses a box-shaped fish trap that measures 1/4meter by 2/3meter by 3/5meter. What is the volume of the trap in the cu
Travka [436]

To find the volume of a box-shaped fish trap, we have to multiply the three dimensions of it: 

(1/4 m)* (2/3 m)* (3/5 m)

= (1*2*3)/ (4*3*5) m^(3)

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= 0.1 m^(3)

The volume of the box-shaped fish trap is 0.1 m^(3).

Hope this is helpful~

7 0
3 years ago
In 3 years, Dianna will be 4 times as old as she was 33 years ago. How old is Dianna now? Choose the most logical value for the
Masteriza [31]
<span>Today's age = x

4(x - 33) = x + 3
4x - 132 = x + 3
4x - x = 3 + 132
3x = 135
x = 135/3
x = 45

Answer:
Dianna is 45 years old now.

</span>
7 0
3 years ago
John must score 80% correct on a test to qualify for a job. His score was 36/40. Does he qualify? What is his percent correct?
snow_lady [41]

Answer:

Yes, 90%

Step-by-step explanation:

Just simply divide 36 by 40. You can use a calculator to get you that answer.

3 0
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