Answer:
60
Step-by-step explanation:
The mean of a set of numbers is calculated by adding them all together and then dividing the sum by the amount of values in the data set. In this scenario, we know the mean is 30, and there are 3 numbers in the data set, 10, 20, and an unknown number (x).
Let's set up an equation with the information we have.
30 = (10 + 20 + x) / 3
Now we can multiply both sides by 3 ==>
90 = 10 + 20 + x
Combine like terms ==>
90 = 30 + x
Subtract 30 from each side ==>
60 = x
And now you have your answer!
The value of x = 60 would make the mean of the data set 30.
It would be C. because you divide a by c and subtract d from it.
Answer:
4x+5=4x-1
Step-by-step explanation:
4x-4x=-1-5
x=-6.
Answer and explanation:
1. -6(x - 4) = 24 <-- the given is the equation that you start off with
2.(A) 
<-- it's the only number answer left. (B) Division Property of Equality <-- division is being involved
4. Addition Property of Equality <-- you're adding 4 to both sides
Answer:Piqued the same time.you should come over to the same time as before I have to take the
Step-by-step explanation:
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