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4 years ago

Write an equivalent expression for this problem 3x(7x2)

Mathematics

1 answer:

Anni [7]4 years ago

5 0

Answer:

3x(14)

Step-by-step explanation:

3x(7x2)

=3(14)

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Which of the following is equal to the rational expression when x does not equal -3 x^2-9/x+3

mestny [16]

Answer:

x - 3

Step-by-step explanation:

Given

$\frac{x^2-9}{x+3}$

Note that x² - 9 is a difference of squares and factors as

x² - 9 = (x + 3)(x - 3), thus

$\frac{(x+3)(x-3)}{x+3}$

Cancel the x+ 3 factor on the numerator/ denominator leaving

x - 3 ← in simplified form

8 0

3 years ago

Jordan swam 4 laps. Each lap is 100 meters. Jordan’s average speed for the first 3/4 of his swim was 40 meters per minute, and f

Leya [2.2K]

Answer/step-by-step explanation:

The 300/40 comes from the fact that ¾ of a 400 meter swim is 300 meters, and if you want to know how long he took to do that, you need to divide by the speed, 40 meters per minute (meters divided by meters per minute = minutes). Likewise with the 100/35—that’s the last 100 meters he swam, at the slightly slower speed.

Just to bring it all the way home, average speed is total distance divided by total time. that the total distance is 400 meters. You know the total time is 300/40 + 100/35. Average speed, then, is:

Average Speed: $= \frac{400}{\frac{300}{40} +\frac{100}{35} }$

Round: 39 meters per minute

I think if wrong I'm sorry

5 0

3 years ago

A stand at a farmer's market sells three different types of apples. The table below shows the cost and weight of the apples.

Crank

Answer:

and what are the numbers there bud

4 0

3 years ago

Read 2 more answers

HELP ASAP ILL GIVE BRAINLIST!!What is a statistical question and what is it’s purpose? Be sure to include the 3 characteristics

Alik [6]

Answer:

When you ask a statistical question, you should expect to get a wide variety of answers.

Step-by-step explanation:

7 0

3 years ago

The sets of numbers 6, 8, 10 and 5, 12, 13 are Pythagorean triples. Use what you know about the Pythagorean Theorem and explain

masya89 [10]

Step-by-step explanation:

We know that the Pythagorean theorem is represented in the formula:

a^2 + B^2 = c^2

Where a and b are the legs of a right triangle, and c is the hypotenuse. Therefore, looking at the Pythagorean triples, we can infer that they are considered Pythagorean triples because they follow the Pythagorean theorem. To check if this is true, we can insert the numbers into theorem:

a^2 + b^2 = c^2

6^2 + 8^2 = 10^2

36 + 64 = 100

Since this equation is true, these three numbers could be the lengths of a right triangle, and are also therefore, a Pythagorean triple. We can also check the other three numbers:

a^2 + b^2 = c^2

5^2 + 12^2 = 13^2

25 + 144 = 169

Since this equation is also true, these three numbers could also be the side lengths of a right triangle, and are also therefore, a Pythagorean triple.

3 0

4 years ago