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3 years ago

X + 4y = -3 x + 7y = - 12 *

Mathematics

1 answer:

Leokris [45]3 years ago

5 0

Answer:

??? Please be specific

Step-by-step explanation:

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Which of the expressions below can be factored using the difference of squares method?

zlopas [31]

Answer:

The second choice is correct. It can be factored as:

$9x^2-16y^2=(3x-4y)(3x+4y)$

Step-by-step explanation:

The Difference of Squares Method for Factoring

The expression:

$a^2-b^2=(a-b)(a+b)$

Is a widely used method to factor binomials that are expressed as the subtraction of two perfect squares.

The condition for a binomial to be factored by using this method is that both terms must have an exact square root and they must be subtracted.

The last two choices are not valid because they are not a subtraction but an addition.

The first choice is not valid because none of the terms is a perfect square.

The second choice is correct. It can be factored as:

$9x^2-16y^2=(3x-4y)(3x+4y)$

4 0

3 years ago

If it takes bottling machine to fill 150 bottles per minute, how many minutes will it take the machine to bottle 4500 bottles

RSB [31]

It takes bottling machine to fill 4500 bottles in 30 minutes.

8 0

3 years ago

Find the y-intercept and graph the equation y=15x

icang [17]

The y-intercept is 0 because you can add it to the equation and it won't change your slope.

6 0

3 years ago

Can you help me with the answer for these questions please

marishachu [46]

23. 90
24. Games 1-5 had an average of 8 and games 6-10 had an average of 11, so games 6-10 had an average greater than games 1-5 by 3 points.
25. 168

3 0

3 years ago

Read 2 more answers

How many DVDs. A small independent movie company determines the profit P for producing n DVD copies of a recent release is P = −

Softa [21]

The company should produce "85" DVD's to maximize the profit.

According to the question,

The profit P for producing n DVD copies are

$P=-0.02n^2+3.4n -16$

Let,

The number of units be "n".

Now,

To find the minimize profit,

→ $P'(n) = 0$

→ $-0.04n+3.4=0$

By substracting "3.4" from both the sides, we get

→ $-0.04n+3.4-3.4=-3.4$

→ $-0.04n = -3.4$

→ $n = \frac{-3.4}{-0.04}$

→ $n = 85$

Thus the answer above is right.

Learn more:

brainly.com/question/20862980

7 0

2 years ago