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o-na [289]
4 years ago
6

How do you use PEMDAS?

Mathematics
2 answers:
Soloha48 [4]4 years ago
8 0

Answer:

first you do whats inside the  Parenthesis

then you do the exponents

then you multiply

then you divide

then you add

then you subtract

Step-by-step explanation:

(6–2)+2/3

According to PEMDAS, Numbers in parentheses are the first thing to solve in these types of questions. In this case, we would get:

(4)+2/3

Now, instead of doing the easy thing and going straight to adding 3 with 2/3 (which could alter our answer), we will look to PEMDAS.

Division comes before addition, so we do that first.

So then we get 4+0.67

=4.67

Therefore, whenever faced with a simple equation with just numbers, one should always look to PEMDAS as a method to outline the process with which they solve the question.

In very simple cases, it is also called DMAS, where parentheses and exponents are neglected.

IRINA_888 [86]4 years ago
8 0

Answer:

PEMDAS is the acronym for brackets, exponents, division, subtractions, multiplication. Given two or more operations, the PEMDAS letters series tells you, before the calculation is complete, what you can measure first, second and third.

~DjMia~

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an outdoor swimming pool costs $9 per day to visit during the summer. there is also a $25 yearly registration fee. is the total
jolli1 [7]

Answer:

No

Step-by-step explanation:

cost=25+8d

To be proportional you'd have to have no flat fee: cost=8d

1 day = $8

2 days = $16

5 days = $40

10 days = $80, etc.

I hope I helped.

3 0
3 years ago
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There were 12 boys and 20 girls in chorus. What is the ratio of boys to girls? A:3:8
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Answer:

C 3.5.......

Step-by-step explanation:

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5 0
3 years ago
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An article in Fire Technology, 2014 (50.3) studied the effectiveness of sprinklers in fire control by the number of sprinklers t
gregori [183]

Answer:

probability that all of the sprinklers will operate correctly in a fire: 0.0282

Step-by-step explanation:

In order to solve this question we will use Binomial  probability distribution because:

  • In the question it is given that the sprinklers activate correctly or not independently.
  • The number of outcomes are two i.e. sprinklers activate correctly or not.

A binomial distribution is a probability of a success or failures outcomes in an  repeated multiple or n times.

Number of outcomes of this distributions are two.

The formula is:

b(x; n, P) = C_{n,x}*p^{x}  * (1 - p)^{n-x}

b = binomial probability  also represented as P(X=x)

x =no of successes

P = probability of a success on a single trial

n = no of trials

C_{n,x} is calculated as:

C_{n,x} = n! / x!(n – x)!

        = 10!  / 10!(10-10)!

        = 1

According to given question:

probability of success i.e. p = 0.7 i.e. probability of a sprinkler to activate correctly.

number of trials i.e. n = 10 as number of sprinklers are 10

To find: probability that all of the sprinklers will operate correctly in a fire

X = 10 because we have to find the probability that "all" of the sprinklers will operate correctly and there are 10 sprinklers so all 10 of them

So putting these into the formula:

P(X=x) = C_{n,x}*p^{x}  * (1 - p)^{n-x}

           = C₁₀,₁₀ * 0.7¹⁰ * (1-0.7)¹⁰⁻¹⁰

           =  1 * 0.0282 * (0.3) ⁰

           = 1 * 0.0282 * 1

  P(X=x)        = 0.0282

5 0
3 years ago
3/5 +9/10= Please answer<br>​
Art [367]

Answer:

3/2 or 1.5

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Multiply 3/5 by 2 to make the denominator of both fractions equal.

2 x 3/5 = 6/10

Now that the denominators are equal, add the two fractions together

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4 0
3 years ago
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8 15 27 blank 20 find the blank number​
777dan777 [17]

Answer:

the blank number is 23

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8, 15, 27, x, 20

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= 15 ÷ 8 =27÷ 15

= 1.8 = 1.8

20 ÷ x = x ÷ 27

( cross multiply,)

x²= 540

x =√540

x = 23.24

x = 23

6 0
4 years ago
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