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FinnZ [79.3K]
3 years ago
10

What is x-y = 11 and 2xty=19

Mathematics
1 answer:
aniked [119]3 years ago
7 0

Step-by-step explanation:

use substitution method

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Simplify the algebraic expression by combining like (or similar) terms.<br> -7x - 8y- 5x - 6y
stira [4]

Answer:

-12x - 14y

Step-by-step explanation:

First I would move them side by side so I can see it better so:

-7x - 5x - 8y - 6y

now combine the x values together and the y values together:

-12x - 14y

7 0
3 years ago
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Solve, cross multiply<br><br>(x+2) / 2x = 3/2
bonufazy [111]

Answer:

1

Step-by-step explanation:

x+2/2x=3/2

2x×3=2x+4

6x=2x+4

4x=4

x=4/4

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5 0
3 years ago
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konstantin123 [22]
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The equation through the point (-2, 5) and is parallel to the line with the equation y=2x+7
andrezito [222]
If a line is parallel to y=2x+7 the line must have the same slope but different y- intercept. The equation y=2x+7 has a slope (m) of 2 and y- intercept of 7.

By using the point slope formula and the point (-2,5) we have:

y = m(x -x1) + y1 \\  \\ y = 2(x - ( - 2)) + 5 \\  \\ y = 2(x + 2) + 5 \\  \\ y = 2x + 4 + 5 \\  \\ y = 2x + 9
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3 years ago
Help, I don’t know what I’m doing<br> Trigonometry
spin [16.1K]

Answer:

\frac{\sqrt{3} }{6}

Step-by-step explanation:

using the 30- 60- 90 triangle for exact values , then

tan60° = \sqrt{3} , and

cot60° = \frac{1}{tan60} = \frac{1}{\sqrt{3} }

cos60° = \frac{1}{2}

cot60° cos60°

= \frac{1}{\sqrt{3} } × \frac{1}{2}

= \frac{1}{2\sqrt{3} } ← rationalise the denominator by multiplying by \frac{\sqrt{3} }{\sqrt{3} }

= \frac{1}{2\sqrt{3} } × \frac{\sqrt{3} }{\sqrt{3} }

= \frac{\sqrt{3} }{6}

5 0
2 years ago
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