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jeyben [28]
3 years ago
14

If it rains 40% of the days in April, how many days will it rain? (HOW DID YOU GET YOUR ANSWER. PLEASE SHOW WORK!! ONLY ANSWER I

F YOU SHOW ON HOW YOU GOT YOUR ANSWER!!!)
A. 12
B. 1/169
C. 11 1/8
D. 60%
E. 0.5
F. 2/112
G. 25%
H. 0.25
I. 25
Mathematics
2 answers:
Simora [160]3 years ago
6 0

9514 1404 393

Answer:

  A.  12

Step-by-step explanation:

"Of" means "times" when you're talking about percentages. 40% of 30 means 40% times 30:

  40% × 30 = 40/100 × 30 = 1200/100 = 12

40% of 30 days is 12 days

_____

In general "%" and "/100" are interchangeable. They mean the same thing.

Marat540 [252]3 years ago
3 0

Step-by-step explanation:

40% of 30 dsys =12 by dividing

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GuDViN [60]

Answer:

28n 72uwbs jsjsbkajskld

5 0
3 years ago
X×9=y, y-70=11 , y=?​
solmaris [256]

Answer:

y=81

Step-by-step explanation:

x=9 and y=81

y-70=11 (add 70 onto 11)

y=81

5 0
3 years ago
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200 σ j=1 2j( j 3) describe the steps to evaluate the summation. what is the sum?
ziro4ka [17]

The sum of the equation is  = 5494000.

<h3>What does summation mean in math?</h3>

The outcome of adding numbers or quantities mathematically is a summation, often known as a sum. A summation always has an even number of terms in it. There may be just two terms, or there may be 100, 1000, or even a million. Some summations include an infinite number of terms.

<h3>Briefing:</h3>

Distribute 2j to (j+3).

Rewrite the summation as the sum of two individual summations.

Evaluate each summation using properties or formulas from the lesson.

The lower index is 1, so any properties can be used.

The sum is 5,494,000.

<h3>Calculation according to the statement:</h3>

\sum_{j=1}^{200} 2 j(j+3)

simplifying them we get:

\sum_{j=1}^{200} 2 j^{2}+6 j

Split the summation into smaller summations that fit the summation rules.

\sum_{j=1}^{200} 2 j^{2}+6 j=2 \sum_{j=1}^{200} j^{2}+6 \sum_{j=1}^{200} j

\text { Evaluate } 2 \sum_{j=1}^{200} j^{2}

The formula for the summation of a polynomial with degree 2

is:

\sum_{k=1}^{n} k^{2}=\frac{n(n+1)(2 n+1)}{6}

Substitute the values into the formula and make sure to multiply by the front term.

(2)$$\left(\frac{200(200+1)(2 \cdot 200+1)}{6}\right)$$

we get: 5373400

Evaluating same as above : 6 \sum_{j=1}^{200} j

we get: 120600

Add the results of the summations.

5373400 + 120600

= 5494000

The sum of the equation is  = 5494000.

To know more about  summations visit:

brainly.com/question/16679150

#SPJ4

6 0
2 years ago
Whats 9+10? dont answer wrong
ozzi

19

Step-by-step explanation:

when we add 9 and 10 we will get sum 19

4 0
3 years ago
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JulsSmile [24]
The answer for the question is B
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