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goblinko [34]
3 years ago
14

a piano has 52 white keys and 36 black keys. What is the probability of pressing a white key? answer as a fraction in simplest f

orm
Mathematics
2 answers:
Anna35 [415]3 years ago
8 0
The answer is 13/22, the person above is correctttt
Darina [25.2K]3 years ago
5 0
P=52/(52+36)=52/88=13/22
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What are the explicit equation and domain for an arithmetic
max2010maxim [7]

Given:

First term of an arithmetic sequence = 5

Second term = 3

To find:

The explicit formula for the given arithmetic sequence.

Solution:

We have,

First term: a_1=5

Second term: a_2=3

Common difference is

d=a_2-a_1

d=3-5

d=-2

Now, the explicit formula for an arithmetic sequence is

a_n=a+(n-1)d

where, a is first term and d is common difference.

Putting a=5 and d=-2, we get

a_n=5+(n-1)(-2)

It can also be written as

a_n=5-2n+2

a_n=7-2n

Here, n is an integer greater than or equal to 1.

Domain is the set of input values.

Therefore, the explicit equation is a_n=5+(n-1)(-2) or a_n=7-2n and domain is all interest greater than or equal to 1.

8 0
2 years ago
Suppose your local school district decides to randomly test high school students for attention deficit disorder (ADD). There are
REY [17]

Answer:

Option C is correct. Option f is the same as option C

Step-by-step explanation:

From the question, There are three high schools in the district, each with grades between nine to twelve. The school board decided to pool all of the students together and randomly samples 250 students in the whole district that has schools between the grade of nine to twelve.

In order to test for high school students in the district for Attention Deficit disorder(ADD), they could have chosen any 250 students from any school with grades betweem nine to twelve throughout the district.

4 0
3 years ago
The teacher kept track of how long it took students to finish a test. After 20 minutes, 3 students had finished the test.
spin [16.1K]
Well I would say 11 kids after 70 minutes
5 0
3 years ago
GIVE CORRECT ANS FOR BRAINLIEST
gizmo_the_mogwai [7]
<h3>Solution:</h3>

2 \frac{5}{6} - 2 \frac{1}{2}  \\  =  \frac{17}{6}  -  \frac{5}{2}   \\  =  \frac{17 - 15}{6}  \\  =  \frac{2}{6}  \\  =  \frac{1}{2}

<h3>Answer:</h3>

\frac{1}{2}

Hope it helps.

Do comment if you have any query.

7 0
2 years ago
Read 2 more answers
Simplify (x2 16)(x2-16)? <br><br> A. x4- 256<br><br> B. x256 <br><br> C. x432 <br><br> D. x4-32
tiny-mole [99]
(x² + 16)(x² - 16)
= (x²)² - 16²
= x⁴ - 256
7 0
3 years ago
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