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dangina [55]
3 years ago
15

42 students arrived at the school dance after it started. in all 78 students attended. write and solve an equation to find how m

any students arrived at the dance before it started. plz help right when you see it!!!
Mathematics
1 answer:
vladimir2022 [97]3 years ago
6 0

Answer:

The answer is 36

Step-by-step explanation:

we know 42 students arrived after the dance started and 78 arrived in total. You have to subtract 42 from 78. how I remember this: part+part=whole whole-part=part

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Tamia watched 1 2 of a movie in the morning, and she watched some more at night. By the end of the day, she still had 1 3 of the
KonstantinChe [14]

Answer: Tamiya watched \dfrac16 of the movie at night.

Step-by-step explanation:

Let x = part of movie watched at night.

Given  : Tanya watched \dfrac12 of movie in the morning.

Part left to watch = \dfrac13

As per given, we have

\dfrac12+x+\dfrac13=1\\\\\Rightarrow\ x=1-\dfrac13-\dfrac12\\\\\Rightarrow\ x=\dfrac{6-2-3}{6}\\\\\Rightarrow\ x=\dfrac16

Hence, Tamiya watched \dfrac16 of the movie at night.

8 0
3 years ago
The length of a rectangle is (x - 9) feet. Its width is x feet. Write an expression you could use to find the perimeter
steposvetlana [31]

Answer:

The expression for the perimeter of the rectangle is: P = 4x - 18

Step-by-step explanation:

Perimeter of a rectangle:

A rectangle has length l and width w. It's perimeter is given by:

P = 2(l + w)

In this question:

l = x - 9, w = x

So

P = 2(x - 9 + x) = 2(2x - 9) = 4x - 18

The expression for the perimeter of the rectangle is: P = 4x - 18

6 0
2 years ago
Find the exact value of tan 150° in simplest form with a rational<br> denominator.
Ainat [17]

Step-by-step explanation:

tan150°

= -tan30°

= -√3/3.

7 0
2 years ago
Use the multiplication rule to find the probability that the first four guesses are wrong and the fifth is correct. That is, fin
BabaBlast [244]

Complete question is;

Multiple-choice questions each have 5 possible answers, one of which is correct. Assume that you guess the answers to 5 such questions.

Use the multiplication rule to find the probability that the first four guesses are wrong and the fifth is correct. That is, find P(WWWWC), where C denotes a correct answer and W denotes a wrong answer.

P(WWWWC) =

Answer:

P(WWWWC) = 0.0819

Step-by-step explanation:

We are told that each question has 5 possible answers and only 1 is correct. Thus, the probability of getting the right answer in any question is =

(number of correct choices)/(total number of choices) = 1/5

Meanwhile,since only 1 of the possible answers is correct, then there will be 4 incorrect answers. Thus, the probability of choosing the wrong answer would be;

(number of incorrect choices)/(total number of choices) = 4/5

Now, we want to find the probability of getting the 1st 4 guesses wrong and the 5th one correct. To do this we will simply multiply the probabilities of each individual event by each other.

Thus;

P(WWWWC) = (4/5) × (4/5) × (4/5) × (4/5) × (1/5) = 256/3125 ≈ 0.0819

P(WWWWC) = 0.0819

4 0
3 years ago
Help help help math math
Andreyy89

Answer:

yes

Step-by-step explanation:

x increases by 2, and y increases by 3 consistently

8 0
2 years ago
Read 2 more answers
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