3 years ago

How do I solve this? This is grade 9 math.

Mathematics

1 answer:

mafiozo [28]3 years ago

8 0

Answer is A, you should not do negatives on the other side, copy the same monomial on the other sides

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sam wants to cut a 57'' piece of wire into pieces 3/4 long. how many pieces how many pieces will he be able to cut

NeTakaya

This is a division problem involving fractions.
57 / (3/4)
57 * (4/3) =
128/3 = 76 pieces of wire

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2 years ago

Quinn is playing video games at a virtual reality game room. The game room charges 20 dollars for every 30 minutes of play time.

Tpy6a [65]

Answer:

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Step-by-step explanation:

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3 years ago

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Find the greatest common monomial factor : 4a^5b^2 and ab

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4a^5b^2=2*2*a*a*a*a*a*b*b
ab=a*b
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2 years ago

Solve (x + 1)2 – 4(x + 1) + 2 = 0 using substitution.

solniwko [45]

For this case we have to:

Let $u = x + 1$

So:

$u ^ 2-4u + 2 = 0$

We have the solution will be given by:

$u = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2 (a)}$

Where:

$a = 1\\b = -4\\c = 2$

Substituting:

$u = \frac {- (- 4) \pm \sqrt {(- 4) ^ 2-4 (1) (2)}} {2 (1)}\\u = \frac {4 \pm \sqrt {16-8}} {2}\\u = \frac {4 \pm \sqrt {8}} {2}\\u = \frac {4 \pm \sqrt {2 ^ 2 * 2}} {2}\\u = \frac {4 \pm2 \sqrt {2}} {2}$

The solutions are:

$u_ {1} = \frac {4 + 2 \sqrt {2}} {2} = 2 + \sqrt {2}\\u_ {2} = \frac {4-2 \sqrt {2}} {2} = 2- \sqrt {2}$

Returning the change:

$2+ \sqrt {2} = x_ {1} +1\\x_ {1} = 1 + \sqrt {2}\\2- \sqrt {2} = x_ {2} +1\\x_ {2} = 1- \sqrt {2}$

Answer:

$x_ {1} = 1 + \sqrt {2}\\x_ {2} = 1- \sqrt {2}$

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2 years ago

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A scatter plot is made comparing x, the number of hours since midnight, with y, the number of lights turned on in a house. What

Zepler [3.9K]

Answer:

7 hours since midnight and 8 lights turned on.

Step-by-step explanation:

(x,y) so 7 is the x and 8 is the y.

8 0

1 year ago