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Aloiza [94]
3 years ago
8

Solve this using elimination method 5x+25y=60 3x+15y=42

Mathematics
1 answer:
hoa [83]3 years ago
4 0
5x + 25y = 60....multiply by -3
3x + 15y = 42....multiply by 5
-------------------
-15x - 75y = - 180 (result of multiplying by -3)
15x + 75y = 210 (result of multiplying by 5)
-------------------add
0 = 30...incorrect.....this system has no solutions
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The reputation of a city has been decreasing exponentially since 1990. In 1990, the population was 1,000,000. In 2010, the popul
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8 0
3 years ago
(5x8)x 10 to the zero power=
AleksandrR [38]
My math teacher said anything to the power of zero is 1

4 0
3 years ago
Read 2 more answers
Question:
AleksandrR [38]

Answer:

x=8 and y=3 (So, yes!)

Step-by-step explanation:

I will solve your system by substitution.

(You can also solve this system by elimination.)

−x+4y=4;−x+3y=1

Step: Solve −x+4y=4 for x:

−x+4y+−4y=4+−4y(Add -4y to both sides)

−x=−4y+4

-x/-1 = -4y+4/-1 (Divide both sides by -1)

x=4y−4

Step: Substitute 4y−4 for x in −x+3y=1:

−x+3y=1

−(4y−4)+3y=1

−y+4=1(Simplify both sides of the equation)

−y+4+−4=1+−4(Add -4 to both sides)

−y=−3

-y/-1 = -3/-1 (Divide both sides by -1)

y=3

Step: Substitute 3 for y in x=4y−4:

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x=(4)(3)−4

x=8(Simplify both sides of the equation)

<u>Answer:</u>

x=8 and y=3

4 0
1 year ago
A. write an equation that relates a and b when a = 4 when b = 24
tatiyna

Answer:

a + b = 28

b = 31

Step-by-step explanation:

i hope it's correct but I am not sure tho :)

3 0
3 years ago
What is the interquartile range of the data set? {48, 50, 65, 60, 80, 42, 45, 50, 42, 55, 45}
MissTica
Order the number:
42,42,45,45,48,50,50,55,60,65,80

Mean:50
Quartile 1:45
Quartile 3:60

60-45=15. As a result, the interquartile range is 15. Hope it help!
5 0
3 years ago
Read 2 more answers
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