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astra-53 [7]
3 years ago
13

−5x+2y=9 y=7x ​x= y=

Mathematics
1 answer:
Serhud [2]3 years ago
4 0

- 5x+2y=9 \\ y=7x

We know that y=7x, so we just need tu put it into the 1st equation

- 5x + 2 \times 7x = 9 \\  - 5x + 14x = 9 \\ 9x = 9 | \div 9 \\ 9x \div 9 = 9 \div 9 \\ x = 1

So we found x. Now we can find y

y = 7 \times 1 \\ y = 7

Answer:

x=1, y=7; or (1;7)

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Pl help it’s for a grade
allsm [11]

Answer:

(^6√x^5) (√y)

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For x the 6 moves to the front of the square root while the 5 becomes the power of x.

For y, the power to the 1/2 is the same as a square root.

5 0
3 years ago
Multiply and simplify. (4a + 6b)(2a - 2b)
blsea [12.9K]
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6 0
3 years ago
How do you find the percent of a number greater than 100?
bonufazy [111]

Answer:

Multiply the number by the percent (e.g. 87 * 68 = 5916)

Divide the answer by 100 (Move decimal point two places to the left) (e.g. 5916/100 = 59.16)

Round to the desired precision (e.g. 59.16 rounded to the nearest whole number = 59)

Step-by-step explanation:

lets say for example 234

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4 0
3 years ago
Read 2 more answers
......................
nikitadnepr [17]
1) 63-13=s
2) 73-7=?
4) 80-17=?
6) ?-18=74 
That's all I know :)
6 0
3 years ago
Someone help me with that please, thank you.​
melomori [17]

Answer:

5

Step-by-step explanation:

<em>~Hello fellow army~</em>

For this, all you have to do is subtract 9 and 4.

Which is 5 cm.

<u>Final answer</u>

5 cm

8 0
3 years ago
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