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max2010maxim [7]
3 years ago
14

-20x - 7y= 29 10x + 3y = -11

Mathematics
1 answer:
muminat3 years ago
3 0

Answer:

x=1

Step-by-step explanation:

check the attatched photo please

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Some amount of a 120 gram 16% solution was taken out and replaced with pure alcohol. The result was a solution of 30% alcohol. H
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Answer:

  20 grams

Step-by-step explanation:

Let g represent the grams of solution that were replaced. Then the amount of alcohol in the mix is ...

  16%·(120 -g) +100%·g = 30%·120

  19.2 +0.84g = 36.0 . . . . simplify

  0.84g = 16.8 . . . . . . . . . .subtract 19.2

  g = 20 . . . . . . . . . . . . . . .divide by 0.84

20 grams of solution were taken out and replaced.

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4 years ago
What quadrant does the terminal side of this angle lie in?
Flura [38]

Answer:

D. quadrant III

Step-by-step explanation:

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3 years ago
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3 years ago
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liq [111]

Answer:

Hi! I believe the answer is B. 3

Step-by-step explanation:

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☆Brainliest is greatly appreciated!☆

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3 years ago
Consider the quadratic function f(x) = x2 – 5x + 12. Which statements are true about the function and its graph? Select three op
klasskru [66]

The graph of the quadratic function f(x)=x² - 5x + 12 is a parabola which opens up.

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

The standard form of a quadratic equation is:

y = ax² + bx + c

The graph of a quadratic equation is a parabola.

The graph of the quadratic function f(x)=x² - 5x + 12 is a parabola which opens up.

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