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Damm [24]
3 years ago
13

Select the two binomials that are factors of this trinomial. x^2-3x-28 help please I really bad need it

Mathematics
1 answer:
Fofino [41]3 years ago
8 0

Answer:

(x-7)(x+4)

Step-by-step explanation:

To factor the equation, break it into two binomials which multiply to make the equation. To write these binomials (x+a)(x+b), find factors which multiply to -28 and add to -3 for a and b.

28: 1,2,4,7,14,28

-7+4 = -3

x^2-3x-28 = (x-7)(x+4)

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A baby blue whale weighed 5520 pounds at birth. After two days, the baby weighed 5710. After 14 days, the baby weighed 8180 poun
Aleonysh [2.5K]

Answer:

Constant of proportionality is 190.

Step-by-step explanation:

To find proportionality constant we will find difference of weights after 2 days and at birth.

5710-5520=190

Now we will find difference of weights after 14 days and at birth. We will divide the difference by 14.

\frac{8180-5520}{14}

\frac{2660}{14}=190

We can see that weights are increasing at a constant rate of 190 pounds per day. Therefore, our constant of proportionality is 190.

8 0
2 years ago
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HELP PLZZZZZZZZZ! A cylindrical container has a diameter of 8 in. The height is 12 in. The container is 20% full with juice. Wha
liubo4ka [24]

Answer:

The exact volume is 192π

1)You multiply the radius squared by the height so 4^2 times 12

2)38.4π because you take the volume of the cylinder and multiply it by .20

Step-by-step explanation:

6 0
3 years ago
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A home gardener estimates that 18 apple trees will produce an average yield of 80 apples per tree. But because of the size of th
aliina [53]

19 trees should be planted to maximize the total

<h3>How many trees should be planted to maximize the total</h3>

From the question, we have the following parameters:

Number of apples, x = 18

Yield, f(x) = 80 per tree

When the number of apple trees is increased (say by x).

We have:

Trees = 18 + x

The yield decreases by four apples per tree.

So, we have

Yield = 80 - 4x

So, the profit function is

P(x) = Apples * Yield

This gives

P(x) = (18 + x) *(80 - 4x)

Expand the bracket

P(x) = 1440 - 72x + 80x - 4x^2

Differentiate the function

P'(x) = 0 - 72 + 80 - 8x

Evaluate the like terms

P'(x) = 8 - 8x

Set P'(x) to 0

8 - 8x = 0

Divide through by 8

1 - x = 0

Solve for x

x = 1

Recall that:

Trees = 18 + x

So, we have

Trees = 18 + 1

Evaluate

Trees = 19

Hence, 19 trees should be planted to maximize the total

Read more about quadratic functions at:

brainly.com/question/12120831

#SPJ1

4 0
1 year ago
A certain four​-cylinder combination lock has 50 numbers on it. to open​ it, you turn to a number on the first​ cylinder, then t
kumpel [21]

A certain four​-cylinder combination lock has 50 numbers on it.

It is a four cylinder combination lock

Each cylinder has 50 numbers

So we have to choose 4 numbers for 4 cylinders

_____ , ______ , ______, _____

you turn to a number on the first​ cylinder

We have 50 numbers so we have 50 combinations

__50___ , ______ , ______, _____

Repetitions are allowed so we do the same for remaining three

50 , 50 , 50 , 50

50 * 50 * 50* 50 = 6250000

There are 6250000 different lock combinations .

7 0
3 years ago
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PLEASE HELP 100 points
g100num [7]
The problem on the left is going to be 1 tens and 8 ones, so 18.

The problem on the right is going to be 2 tens and 9 ones, so 29.
4 0
3 years ago
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