Using Chebyshev's Theorem, what is the standard deviation value for a data set that contains at least 90% of values?
The number of standard deviations is
(Round your answer to one decimal place.)

i just took the test, the correct answer is .. 31.5 in.

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

idk

step-by-step explanation: