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Afina-wow [57]
3 years ago
6

Determine whether 49x^2 − 25 is a difference of two squares. If so, factor it. If not, explain why.

Mathematics
2 answers:
mojhsa [17]3 years ago
4 0
The asnwer is not D because 25 is a perfect square.
it can't be A or C becsuse when you factor the difference of two squares you get this form (a-b)(a+b).
two different signs.

hope it helped.

short answer : B.
Vaselesa [24]3 years ago
3 0
(7x+5)(7x-5)
I think so
Good luck
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Hoochie [10]

Answer:

$55+$9x≥$199

You must work for at least 16 hours to be able to buy the bicycle.

Step-by-step explanation:

Let x represent the number of hours you need to work to buy the bicycle.

You already have $55.

⇒$55+ −−−−−≥ −−−−−

You also earn $9 per hour.

Algebraically, this can be written as 9x.

⇒$55+$9x≥ −−−−−

You need to earn at least $199 to buy the bicycle.

⇒$55+$9x≥$199

The ≥ sign is used because the left-hand side of the inequality must be "greater than or equal to" $199.

Let's find out how many hours you need to work to buy the bicycle.

Subtracting $55 from both sides of the inequality:

⇒$55−$55+9x≥$199−$55

⇒$9x≥$144

Dividing both sides by $9:

⇒$9x$9$=$144$9

∴x≥16

Therefore, you need to work at least 16 hours to afford the bicycle.

3 0
3 years ago
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Find the product of the complex numbers (-5+ 8i) and (3 - 8i)
Liula [17]

Answer: 49+64i

Step-by-step explanation:

Concept to know:

i=√-1

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=-15+40i+24i-64i²

=-15+64i-64i²

=-15+64i+64  (remember, i²=-1)

=49+64i

Hope this helps!! :)

Please let me know if you have any question or need further explanation

7 0
4 years ago
What fraction is 6 of 18​
Leto [7]

Answer:

1/3

Step-by-step explanation:

6 of 18 = 6/18

Divide by 6, the GCF of the two numbers 6 and 18, to get 1/3.

6 is 1/3 of 18.

4 0
3 years ago
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Using Cavalieri's Principle, what is the general formula for the volume of a cone?
Anit [1.1K]

Answer:

The volume for a cone and pyramid are the same, V = 1/3 Bh where B is the area of the base.

Step-by-step explanation:

So even though the base is a different shape, as long as the areas and heights are the same, they will have the same volume.

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3 years ago
Glenn rolls a 6-sided die. What is the probability that he gets a number greater than 2 or an odd number?
Marysya12 [62]
Hello!

You can write down what the possible numbers their are

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The answer is 5/6

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