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-Dominant- [34]
3 years ago
9

Find coordinates for x+5y=10 and 3x+5y=0. I need to know how to do this plz explain.

Mathematics
2 answers:
maks197457 [2]3 years ago
4 0

Answer:

(-5,3)

Step-by-step explanation:

<em><u>Method</u></em>

There are several ways you can do this, but one of the best ways is to use a graphing coordinate calendar. The most popular one is Desmos Graphing Calculator. I've attached an image of my work below using the system.

<u><em>Answer</em></u>

As you can see, both equations intersect at a certain coordinate point. This coordinate point is the point you need for the answer. The intersection is (-5,3).

I hope this helps. If you have any more questions, please feel free to post them and someone will be able to help you, whether it's myself or others. Please leave a like, rating, and if possible, Brainliest. Have a great day!  

Hitman42 [59]3 years ago
3 0

Answer:

x = -5

y = 3

Step-by-step explanation:

x+5y=10.........i

3x+5y=0........ii

From (i)

x = 10-5y.....iii

Substitute (iii) in equ(ii)

3(10-5y) + 5y =0

Expand the bracket

30 - 15y + 5y = 0

30 - 10y = 0

30 = 10y

30/10 = y

3 = y......(iv)

Substitute 3 for y in the first equation..

x+5y=10

x + (5×3) = 10

x = 10 - 15

= -5

x = -5 and y = 3

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Step-by-step explanation:

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In 2010 an item costs $9.00. The price increases by 1.5% each year. How much will it be in 2030?
Yanka [14]

Answer:11.7

Step-by-step explanation:

1. Recognize variables. Starting price is 9, it’s increasing by 1.5% each year, the question asks for the price in 20 years.

2. Convert percentage to decimal. Most calculators won’t understand multiplying by percentages, and instead will understand multiplying by decimals. A decimal is something we can easily work with. It is more commonly taught to work with decimals as well. With that said 1.5% equals .015. (The number in the ones place in the percentage is always in the hundredths place when converted to a decimal, the tens to the tenths, the hundreds in the percentage to the ones place in the decimal, the hundredths in the percentage to the ten thousandths in the decimal. Basically, every individual number [the 5 in 1.5] moves two spaces to the right when going from percentage to decimal form, likewise two to the left going from decimal to percentage form. 23%=.23, 104%=1.04, 0.5%=.05, 1.234%=.01234)

3. Make your equation

20(9*(.015))+9

+9 is your starting point

9*(.015) gives you the amount the price increases per year

20 is multiplied then to that increased price for the next 20 years

4. Crunch em numbers

PEMDAS

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3 years ago
Question 4: What is the solution of the system? *<br> .A<br> .B<br> .C<br> .D
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Answer:

C

Step-by-step explanation:

x+4y=-12

x+7y=-15

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so point is (-8,-1)

4 0
3 years ago
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