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Anestetic [448]
3 years ago
12

If (1/a)+(1/b)=10 what is the value of a+b?

Mathematics
1 answer:
Goshia [24]3 years ago
3 0
B) 2/5 

I think, if a and b are the same (coz then they would both equal 0.2)
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NEED HELP ASAP!!!!!!!
Tema [17]

Answer:

5:3

Step-by-step explanation:

to simplify this equation we have to find something that both numbers can be divided by

both numbers can be divided by 7

so when we divide the numbers we get

5b = 3c

so basically the ratio is 5:3

3 0
2 years ago
Tia is making strawberry lemonade for a baseball tournament. The recipe calls for 2
gogolik [260]
Answer:

she can make 9
8 0
3 years ago
Read 2 more answers
A random sample of 25 roundtrip flights between Philadelphia and Dallas has an average airfare of $393.50 with a sample standard
Sauron [17]

Answer:

$393.50+/-$19.72

= ( $373.78, $413.22)

Therefore, the 95% confidence interval (a,b) = ($373.78, $413.22)

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = $393.50

Standard deviation r = $50.30

Number of samples n = 25

Confidence interval = 95%

z value(at 95% confidence) = 1.96

Substituting the values we have;

$393.50+/-1.96($50.30/√25)

$393.50+/-1.96($10.06)

$393.50+/-$19.7176

$393.50+/-$19.72

= ( $373.78, $413.22)

Therefore, the 95% confidence interval (a,b) = ($373.78, $413.22)

5 0
3 years ago
Mrs porcelli’s classroom bulletin board is 2/1/4 feet long. Ms Smith’s bulletin board is 3 times as long Mrs porcelli’s.How long
yuradex [85]

Answer:

6.75 or 6 3/4

Step-by-step explanation:

First take the whole number and multiply that by 3.

2*3=6

Now, take the fraction and multiply that times 3.

1/4 as a decimal is 0.25. You can ignore the decimal point right now, but you have to remember it is there later.

So, whithout the decimal point, 25*3= 75.

Now, you add the decimal. The 75 is now 0.75, with the decimal.

Add the whole number and the decimal, and you have your answer!

6+0.75=6.75. As a fraction this is 6 3/4

6 0
3 years ago
What is the answer ‍⬛<br><br><br> -1 1/5 + (-3/5)
Luda [366]

Answer:

-9/5

Step-by-step explanation:

I am pretty sure this is it and hope it helps

4 0
2 years ago
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