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oksian1 [2.3K]
3 years ago
10

Can you cube root a negative number? Why or why not?

Mathematics
1 answer:
nasty-shy [4]3 years ago
8 0

Answer: no

Step-by-step explanation:

Negative numbers can't have real number square roots, but negative numbers can have real number cube roots

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Simplify: (x+7)(x-4)
SVETLANKA909090 [29]

Answer:

x² + 3x - 28

Step-by-step explanation:

Each term in the second factor is multiplied by each term in the first factor

(x + 7)(x - 4)

= x(x - 4) + 7(x - 4) ← distribute both parenthesis

= x² - 4x + 7x - 28 ← collect like terms

= x² + 3x - 28


6 0
3 years ago
The price of a shirt is marked down from $12.50 to $10,00. What is the percent decrease of the shirt?
choli [55]

Answer: 20%.

Step-by-step explanation:

Given, The price of a shirt is marked down from $12.50 to $10.00.

Previous price = $12.50

New price = $10.00

Change in price = Previous price - New price

= $12.50 - $10.00

= $2.50

Now, the percent decrease of the shirt = \dfrac{\text{Change in price}}{\text{Prevoius price}}\times100

=\dfrac{2.50}{12.50}\times100\\\\=20\%

Hence, the percent decrease of the shirt = 20%.

7 0
3 years ago
The calculation of the mean of a population and the expected value of the probability mass function of a Random Variable (RV) ar
Zanzabum

Answer: Hello the options related to your question is missing attached below are the missing options.

A.) The probabilities of the RVs may be equal

B.) The sum of the probabilities of the RVs exceed 1

C.) This is an impossible occurrence

D.) The probabilities of the RVs must be equal

E.) None of the above

answer:

The probabilities of the RVs may be equal ( A )

Step-by-step explanation:

Given that the value of the  population mean and the value of probability mass function of a set of random variables are similar

For the Random Variables : 100,200,300,400

The Probability mass function of RV = ( 100 + 200 + 300 + 400 ) / 4

Hence  The probabilities of the RVs may be equal

3 0
3 years ago
During February Kevin water his IVy every third day and water his Cactus every fifth day well Kevin water both plants together a
Ivanshal [37]
Kevin will water both of his plants on the 15th.

The lowest common multiple of 3 and 5 is 15. Therefore, he will water both then.

8 0
3 years ago
Which unit is Gallegos most likely to use when measuring the length and width of his garage floor?
vichka [17]
Probably feet or meters depending on where he is. I would go with feet
7 0
3 years ago
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