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zalisa [80]
3 years ago
7

Rewrite using a single positive exponent. 7^9 x 7^-3

Mathematics
2 answers:
Elena L [17]3 years ago
8 0
When you multiply you add the exponents, so 7^9*7^-3=7^6
guajiro [1.7K]3 years ago
6 0

Answer:

7^{6}

Step-by-step explanation:

Using the rule of exponents

a^{m} × a^{n}  ⇔ a^{(m+n)}, thus

7^{9} × 7^{-3}

= 7^{(9-3)}

= 7^{6}

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The mean monthly car payment for 121 residents of the local apartment complex is $372. What is the best point estimate for the m
rodikova [14]

Answer:

Needed point estimate is $372

Step-by-step explanation:

Given:

Number of houses in resident area = 121

Monthly mean car payment = $372

Find:

Best point estimate for the mean monthly car payment

Explanation:

The "best point estimate" for such average monthly automobile payment for all inhabitants of the nearby apartment complex is used as the "sample mean." In this example, a $372 sample was obtained on 121 residents.

As a result, the needed point estimate is $372.

7 0
3 years ago
Someone help with this too pls
Vesnalui [34]

Answer:

the answer is 18 months==1 year 6 months

6 0
2 years ago
Coach pug will train your dog for a membership fee of 45 dollar and a session fee of 20 dollars. Dr.Doberman will train your dog
N76 [4]

Answer:

Coach pug charges $45 only one time, and an additional of $20 per session.

So if you take x sessions, the total cost will be:

c(x) = $45 + $20*x

Dr. Doberman charges only $30 per session, then the cost for x sessions will be_

d(x) = $30*x

Now, which one is better for you?

We need to see the value of x such that:

d(x) = c(x)

$30*x = $45 + $20*x

$30*x - $20*x = $45

$10*x = $45

x = $45/$10 = 4.5

This means that if you take 4 sessions or less, is better the Dr. Doberman, because in this case we do not have an y-intercept.

If you want to have 5 sessions or more, is better Coach Pug, because the slope of the equation is smaller, so the costs for larger values of x will be smaller.

3 0
3 years ago
Which proportion models this problem?
Ilya [14]
Thank you for posting your question here at brainly. Feel free to ask more questions.  

The best and most correct answer among the choices provided by the question is <span>C. x over 520 = 5 over 13</span>.<span>       
    </span><span>
Hope my answer would be a great help for you.</span>
7 0
3 years ago
Find 9 is 25 % of what number
pishuonlain [190]
9 is 25% of 36

25% is a quarter

a quarter of 36 is 9

Hope I helped
8 0
3 years ago
Read 2 more answers
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