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2 years ago

Subtract (5x + 3) from (9x – 7).

Mathematics

2 answers:

IceJOKER [234]2 years ago

6 0

Answer:

4x - 11

Step-by-step explanation:

Set the expression.

9x - 7

- (5x + 3)

-------------

First, distribute -1 to all terms within the parenthesis:

-(5x + 3) = -5x - 3

Simplify. Combine like terms.

(9x - 7) + (-5x - 3) = 9x - 5x + (-7) - 3

(9x - 5x) + (-7 - 3)

4x - 11

4x - 11 is your answer.

Dafna1 [17]2 years ago

5 0

Answer:

$\large\boxed{4x-10}$

Step-by-step explanation:

$(9x-7)-(5x+3)\\\\=9x-7-5x-3\qquad\text{combine like terms}\\\\=(9x-5x)+(-7-3)\\\\=4x-10$

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jeka57 [31]

Answer:

We would advise her to choose Country Route because in this route time consistent between 15 and 18 minutes.

Step-by-step explanation:

We are given that Jean lives about 10 miles from the college where she plans to attend a 10-week summer class. There are two main routes she can take to the school, one through the city and one through the countryside.

Jean sets up a randomized experiment where each day she tosses a coin to decide which route to take that day. She records the following data for 5 days of travel on each route.

Country Route - 17, 15, 17, 16, 18 (in minutes)

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As we can see from the data that the Country route timings is consistent between 15 to 18 minutes which means most of the times she will reach college between these minutes only.

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2 years ago

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2 years ago

Monica has a bag of marbles. There are 4 red marbles and 7 blue marbles and 5 yellow marbles in a bag. Monica will randomly pick

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Answer:

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Step-by-step explanation:

We have been given that there are 4 red marbles and 7 blue marbles and 5 yellow marbles in a bag. Monica will randomly pick two marbles out of the bag replacing the first marble before picking the second marble.

Since Monica will replace the first marble before picking the second marble, therefore, probability of both events will be independent and probability of occurring one event will not affect the probability of second event's occurring.

Since the probability of two independent compound events is always the product of probabilities of both events.

$P(\text{A and B})=P(A)*P(B)$