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3 years ago

How do I complete this formal check?

Mathematics

1 answer:

postnew [5]3 years ago

8 0

IDK sorry I need points

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How to factor polynomials

Ierofanga [76]

<span>Check for the GCF first. ...Multiply the quadratic term and the constant term. ...Write down all the factors of the result, in pairs. ...<span>From this list, find the pair that adds to produce the coefficient of the linear term.</span></span>

6 0

3 years ago

During a tunnel construction project, engineers used explosives to excavate partway into a mountain. Because of time constraints

AnnyKZ [126]

The given data can be tabulated as:

number of days,x length of tunnel (ft), y

0 225

5 350

20 725

30 975

55 1,600

To check if the growth is linear, the slope at points (0, 225) and (5, 350), and (0, 225) and (20, 725) should be equal. The formula for slope is:

m = (y2 – y1) / (x2 – x1)

Finding for slope (0, 225) and (5, 350):

m = (350 – 225) / (5 – 0) = 25

Finding for slope (0, 225) and (20, 725):

m = (725 – 225) / (20 – 0) = 25

Therefore the equation is linear in the form of:

y = mx + b

where b is the value of y at x = 0, so b = 225

The complete equation is:

y = 25x + 225

At x = 86 days

y = 25(86) + 225

y = 2,375 ft

Therefore the length of the completed tunnel is 2,375 feet.

5 0

3 years ago

3 divide by what number equals 5

marysya [2.9K]

First write the equation
3/n = 5

Multiply both sides by n
3/n * n = 5 * n

Simplify
3 = 5 * n

Divide both sides by 5
3/5 = 5 * n/5

Simplify
3/5 = n

Divide
0.6 = n

So 3/0.6 = 5

4 0

3 years ago

What is the value of 20 ÷ (-4)?

DerKrebs [107]

Answer:

-5

Step-by-step explanation:

20 ÷ (-4)=-5

8 0

3 years ago

An airline weighed the carry-on luggage of all its

nikklg [1K]

Using the graph, it is found that 976 passengers had carry-on luggage that weighed less than 20 lb.

<h3>Graph:</h3>

The graph is not given in this problem, but an internet search indicates that the information it contains is as follows:

120 passengers carry luggage of 4 lb or less.

222 passengers carry luggage between 5 lb and 9 lb.

378 passengers carry luggage between 10 lb and 14 lb.

256 passengers carry luggage between 15 lb and 19 lb.

90 passengers carry luggage between 20 lb and 24 lb.

40 passengers carry luggage between 25 lb or more.

Hence, the number of passengers with luggage below 20 lb is:

$120 + 222 + 378 + 256 = 976$

976 passengers had carry-on luggage that weighed less than 20 lb.

A similar problem, also involving the use of graph, is given at brainly.com/question/25836450

7 0

2 years ago