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miss Akunina [59]
2 years ago
15

I need to know fraction division

Mathematics
1 answer:
alexira [117]2 years ago
6 0

Answer:

Division means sharing an item equally. A fraction has two parts - a numerator and a denominator. ... Dividing fractions is almost the same as multiplying them. For the division of fractions, we multiply the first fraction by the reciprocal (inverse) of the second fraction.

\bold\color{aqua}{hope\:it\:helps}

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The average of four numbers is 98. If three of the numbers are 86,87,and 91 what is the fourth number?
timurjin [86]
To find the average, you have to add all the numbers up and then divide by the amount of numbers you added together.

Equation: (86+87+91+x)/4=98
Solve for x:
86+87+91+x=98*4
264+x=392
x=392-264
x=128

The fourth number is 128
7 0
3 years ago
a total of $21,000 is invested in two bonds that pay 4% and 7.5% simple interest. The bond with 7.5 % interest rate earned 6 tim
hjlf
21000=a+b
ax.075xt=6xbx.04xt
t cancels out
a=3.2b
21000= 3.2b+b
21000=4.2b
b=5000
a=16000

account with 7.5% had 16000 invested in it.
account with 4% had 5000 invested in it
4 0
3 years ago
Bad gums may mean a bad heart. Researchers discovered that 80% of people who have su ered a heart attack had periodontal disease
saul85 [17]

Answer:

0.069 = 6.9% probability that he or she will have a heart attack

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Does not have periodontal disease

Event B: Has a heart attack.

Probability of not having a periodontal disease:

100 - 80 = 20% of 10%(had a heart attack).

30% of 100-10 = 90%(did not have a heart attack). So

P(A) = 0.2*0.1 + 0.3*0.9 = 0.29

Intersection of A and B:

Not having the disease, suffering a heart attack, so 20% of 10%.

P(A cap B) = 0.2*0.1 = 0.02

What is the probability that he or she will have a heart attack?

P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.02}{0.29} = 0.069

0.069 = 6.9% probability that he or she will have a heart attack

6 0
3 years ago
Please can someone help thank you
aleksley [76]

Answer:

3:1

Step-by-step explanation:

240 necklaces in one month

180-sold on website

60- sold in shop

180:60

then you would simplify

so the final answer is 3:1

5 0
2 years ago
What is the equation in slope-intercept form of the line that passes through the points (0, −4) and (2, 0)?
Nastasia [14]

Answer:

y = 2x -4

Step-by-step explanation:

Slope intercept form is  y = mx + b where <em>m </em>is the slope and <em>b </em>is the y-intercept.

Slope is \frac{rise}{run} or \frac{y_2 - y_1}{x_2-x_1} in this case = \frac{0 - (-4)}{2 - 0} = \frac{4}{2} = 2

Substitute one of the coordinates for x and y. I am going to use (0, -4) so:

-4 = 2(0) + b\\-4 = 0 + b\\-4 = b

since m = 2 and b = -4, we can conclude that the equation would be

y = 2x -4

5 0
2 years ago
Read 2 more answers
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