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3 years ago

Use the correct order of operations to solve the problem below

Mathematics

1 answer:

andrew11 [14]3 years ago

7 0

Answer:

Step-by-step explanation:

The order of operations can be remembered with PEMDAS:

Parentheses

Exponents

Multiplication and

Division from left to right

Addition and

Subtraction from left to right

Example:

$12^2-23+(9*3)$

simplify Parentheses:

$12^2-23+(27)\\12^2-23+27$

simplify Exponents:

$144-23+27$

simplify Addition and Subtraction left to right:

$121+27\\148$

Finito.

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Can someone help me with this geometry question asap, thanks!

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Answer:

Step-by-step explanation:

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3 years ago

Umulative Exam Active 11 What are the values of the digits in 90,406? O 9 thousands, 4 tens, and 6 ones 9 thousands, 4 hundreds,

ad-work [718]

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Suppose a student's score on a standardize test to be a continuous random variable whose distribution follows the Normal curve.

blsea [12.9K]

Answer:

a) Percentage of students scored below 300 is 1.79%.

b) Score puts someone in the 90th percentile is 638.

Step-by-step explanation:

Given : Suppose a student's score on a standardize test to be a continuous random variable whose distribution follows the Normal curve.

(a) If the average test score is 510 with a standard deviation of 100 points.

To find : What percentage of students scored below 300 ?

Solution :

Mean $\mu=510$ ,

Standard deviation $\sigma=100$

Sample mean $x=300$

Percentage of students scored below 300 is given by,

$P(Z\leq \frac{x-\mu}{\sigma})\times 100$

$=P(Z\leq \frac{300-510}{100})\times 100$

$=P(Z\leq \frac{-210}{100})\times 100$

$=P(Z\leq-2.1)\times 100$

$=0.0179\times 100$

$=1.79\%$

Percentage of students scored below 300 is 1.79%.

(b) What score puts someone in the 90th percentile?

90th percentile is such that,

$P(x\leq t)=0.90$

Now, $P(\frac{x-\mu}{\sigma} < \frac{t-\mu}{\sigma})=0.90$

$P(Z< \frac{t-\mu}{\sigma})=0.90$

$\frac{t-\mu}{\sigma}=1.28$

$\frac{t-510}{100}=1.28$

$t-510=128$

$t=128+510$

$t=638$

Score puts someone in the 90th percentile is 638.

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3 years ago

I need help with this problem

Vitek1552 [10]

Answer:

X=13

Step-by-step explanation:

So if ΔABC ≅ ΔDEC, then that means that ∠B is ≅ ∠E. Therefore you would write the equation 3x=6x-39 and solve for X to get 13.

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3 years ago

5y + 6 = 25 + 6 what property of equality is used

steposvetlana [31]

Addition property
6=6 then 5y+6=25+6

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2 years ago