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Andrej [43]
4 years ago
13

- Simplify the expression: -21 - (38)

Mathematics
2 answers:
Nutka1998 [239]4 years ago
6 0

Step-by-step explanation:

-21 - (38)

-21-38

-(21+38)

-59

patriot [66]4 years ago
3 0

Answer:

Step-by-step explanation:

-21 - (38)

= -21 - 38

= -59

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The fare for a taxi cab is $2.50 per passenger and $0.75 for each mile. A group of friends has $22.00
xeze [42]

For this case we have to:

x: Let the variable representing the number of people to travel in the group

y: Let the variable representing the number of miles traveled.

If friends only have $22 then we have the following inequality:

2.50x + 0.75y \leq22

Now, if there are three people in the group we have that x = 3.

2.50 (3) + 0.75y \leq22\\7.5 + 0.75y \leq22\\0.75y \leq22-7.5\\0.75y \leq14.5\\y\leq \frac {14.5} {0.75}\\y\leq19.33

The taxi can travel a maximum of 19.33 miles.

On the other hand, if the group wants to travel 10 miles then we have to y = 10.

2.50x + 0.75 (10) \leq22\\2.50x + 7.5 \leq22\\2.50x \leq22-7.5\\2.50x \leq14.5\\x\leq \frac {14.5} {2.50}\\x \leq5.8

Thus, they could travel a maximum of 5 people.

ANswer:

2.50x + 0.75y \leq22

Traveling 3 people, the taxi can travel a maximum of 19.33 miles

Traveling 10 miles, a maximum of 5 people can travel

7 0
3 years ago
Theo ran a 3K in 9.6 minutes, Esteban ran a 5K in 13.5 minutes, and Tetsuo ran a 10K in 31.9 minutes. Who ran the fastest? Round
Charra [1.4K]
Theo ran 3K in 9.6 minutes:

9.6 divided by 3 = 1.2 munutes
3 divided by 3 = 1k

1k = 1.2 minutes.

Estaban ran 5k in 13.5 minutes:

13.5 divided by 5 = 2.7 minutes
5 divided by 5 = 1k

1k = 2.7 munutes

Tetsuo ran 10k in 31.9 minutes:

31.9 divided by 10 = 3.19 munites
10 divided by 10 = 1k

1k = 3.19 minutes

Answer: Theo Ran the Fastest and all the writing above is the resoning.
6 0
3 years ago
PLEASE HELP !!
soldi70 [24.7K]

Answer:

A

Step-by-step explanation:

this is because a range is simply a collection of numbers that can be found in the domain

and since there is no domain, we assume that the numbers are all in the domain

leading us to our answer a

4 0
3 years ago
Steve and josephina run a total of 42 miles in a week. Steve ran six fewer miles than josephina. How many miles did josephina ru
Zielflug [23.3K]
Subtract 42 from 6 and you get 36
8 0
4 years ago
Read 2 more answers
PLEASEEEE HELPPP ITS DUE IN 15 MINUTES!! the exponential regression representing the population of Lazy Town as a function of ti
Advocard [28]

Given:

R^2=0.92,a=8000,b=0.9.

Exponential regression model is

y_1\sim a(b)^{x_1}

To find:

The exponential regression representing the population of Lazy Town as a function of time in years.

Solution:

Exponential regression model is

y_1\sim a(b)^{x_1}       ...(i)

We have, a=8000,b=0.9.

Substituting a=8000 and b=0.9 in (i), we get.

y_1\sim 8000(0.9)^{x_1}

Therefore, the exponential regression representing the population of Lazy Town as a function of time in years, is y_1\sim 8000(0.9)^{x_1}.

4 0
3 years ago
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