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Leni [432]
2 years ago
11

What is -9 in parenthesis to the 5th power divided by -9 in parenthesis to the 7th power?

Mathematics
2 answers:
zaharov [31]2 years ago
7 0

Answer:

1/81

Step-by-step explanation:

ozzi2 years ago
6 0

Answer:

1/9 to the 2nd power or 1/81 (Depends on what the question wants)

Step-by-step explanation:

Since we are doing (-9^5) ÷ (-9^7). You're going to take those two -9s and keep it as just one -9 because they're the same and we'll need them together anyways. Now you're gonna subtract the original bases' exponents (5 - 7) which is going to get you -2. We did this because of the quotient rule which is an exponent rule that applies to expressions where you divide two numbers with the same base, but different powers / exponents. Now you're left with 9^-2. However, exponents cannot ever be negative so you must make this number's reciprocal by flipping the invisible one below the number and making it a numerator by placing it above the number. Doing so turns the exponent positive (so now it looks like 1 over 9^2 aka 1/9^2) which makes it now a valid answer. If the question wants you to evaluate then you multiply 9 by itself as many times as the exponent says to. In this case that'd get you 1/81. Hope this helped so you can do problems like this one with less trouble.

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Express in the form n:1 give n as a decimal 21:12
Makovka662 [10]

1.75:1 which is similar to n:1 where n=1.75

<u>Step-by-step explanation:</u>

Here we have to Express in the form n:1 give n as a decimal 21:12 . Let's find out:

Given ratio as 21:12 . Let's convert it into n:1 , where n is decimal

⇒ 21:12

⇒ \frac{21}{12}

⇒ \frac{3(7)}{3(4)}

⇒ \frac{7}{4}

⇒ \frac{\frac{7}{4}}{\frac{4}{4}}                      { dividing denominator & numerator by 4 }

⇒ \frac{\frac{7}{4}}{1}

⇒ \frac{1.75}{1}

⇒ 1.75:1 which is similar to n:1 where n=1.75

7 0
3 years ago
Based on the 2009 season, the Texas Rangers have a winning percentage of .533. Use the binomial model to find the probability th
Naddik [55]

Answer:

0.128

Step-by-step explanation:

We know the probability for any event X is given by,

P(X=x)=\binom{n}{x}\times p^{n-x}\times q^{x},

where p is the probability of success and q is the probability of failure.

Here, we are given that p = 0.533.

Since, we have that q = 1 - p

i.e. q = 1 - 0.533

i.e. q = 0.467

It is required to find the probability of 4 wins in the next 5 games i.e. P(X=4) when n = 5.

Substituting the values in the above formula, we get,

P(X=4)=\binom{5}{4}\times 0.533^{5-4}\times 0.467^{4}

i.e. P(X=4)=5 \times 0.533 \times 0.048

i.e. P(X=4)=5 \times 0.533 \times 0.048

i.e. i.e. P(X=4)=0.128

Hence, the probability of 4 wins in the next 5 games is 0.128.

8 0
3 years ago
Read 2 more answers
Calculate the mean of: 4.6, 3, 8.1, 9, 12, 3, 9, 3.5, 7, 3.<br> 6.22<br> 5.8<br> 9<br> 3
harkovskaia [24]

Answer:

7.3

Step-by-step explanation:

The mean of 4.6, 3, 8.1, 9, 12, 3, 9, 3.5, 7, 3. 6, 22 , 5.8 , 9 , 3 is 7.3

3 0
3 years ago
Read 2 more answers
Write in exponential notation: 301=​
dalvyx [7]

Answer:

3.01 * 10^2

Step-by-step explanation:

=)

Hope this helps!

4 0
3 years ago
The asseigment that i am doing is kinda hard can i get some help and i am in 7th grade
umka2103 [35]

Answer:

Ok I will help u

Step-by-step explanation:

4 0
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