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2 years ago

Please help if u know

Mathematics

1 answer:

Schach [20]2 years ago

5 0

Answer:

(3x - 5)(x + 1)

Step-by-step explanation:

We need to factor 3x² - 2x - 5.

In order to do this, we must look at the factors of 3 and -5:

3 = 1 * 3

-5 = 1 * -5

Somehow, we need to pair up these so that they add to -2. We realize we can do this by multiplying 1 by -5 and adding that to 1 * 3:

1 * -5 + 1 * 3 = -5 + 3 = -2

So, we have (3x - 5)(x + 1).

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mezya [45]

Answer:

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Step-by-step explanation:

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Mrs. Larson made 12 pillows from 16 yards of the same fabric how much fabric was used to make each pillow between what two whole

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Step-by-step explanation:

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3x-2x+3

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St. Augustine grass can grow at the rate of 4 over 7 centimeter per week.

kotegsom [21]

Given, the rate of growth of St. Augustine grass is $\frac{4}{7}$ cm per week.

We have to find the number of weeks that the grass grow to $\frac{12}{7}$ cm.

Let's take the number of weeks be x.

In 1 week the grass grow = $\frac{4}{7}$ cm

So in x weeks the grass grow = $(\frac{4}{7}) (x) =\frac{4x}{7}$ cm

So we can write,

$\frac{4x}{7} =\frac{12}{7}$

To solve it for x, first we will move 7 to the right side by multiplying it to both sides. We will get,

$(\frac{4x}{7}) (7) =(\frac{12}{7})(7)$

$4x =(\frac{12}{7})(7)$

$4x = 12$

Now to get we will move 4 to the right side by dividing it to both sides. We will get,

$\frac{4x}{4} =\frac{12}{4}$

$x = 3$

So we have got the required answer.

After 3 weeks the grass grow $\frac{12}{7} cm$ .

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2 years ago