Which expression is equivalent to 7(xy)? 7x+y 7x-y X(7y) Xy/7
Answers
Answer:X(7y)
Step-by-step explanation:
Answer:
It's C, I got a 100% on my quiz when I put C
anita has two sisters and three brothers. the mean of all their ages is 6 years. what will their mean age be 10 years from now?twenty years from now?
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Answer: Now: 6 yr mean age in 10 yrs? 16 yr mean age in 20 yrs? 26 yr mean age
Why? Because regardless of the relationship between each sibling's age, your always adding the 10yrs to each individual, which you are then dividing out to determine the mean age. See proof below:
Including anita, there are 6 people. We'll define each age as an unknown variable. Assume we know nothing about the relationships between their ages
for example sake anita's age = a sister 1's age = b sister 2's age = c brother 1's age = d brother 2's age = e brother 3's age = f
Now: mean age = (a + b + c + d + e + f)/(6 people) = 6 yrs
in 10 yrs: mean age = ((a+10) + (b+10) + (c+10) + (d+10) + (e+10) + (f+10))/(6 people) mean age = (a + b + c + d + e + f + 60)/(6 people) mean age = (a + b + c + d + e + f)/(6 people) + (60)/(6 people) mean age = (a + b + c + d + e + f)/(6 people) + 10
Notice the first term is the same expression of the mean age for "Now" Thus, in 10 yrs: mean age = 6 + 10 = 16 yrs
The same principle applies for "x" yrs from now, as long as we know what the mean age is "Now"
Answer:
10 years from now= 16
20 years = 26
Step-by-step explanation:
How to turn 19 / 11 in simplest form
Answers
It's technically in it's simplified form unless you want the decimal of 1.727 (1.73)
Divid 19 by 11. 19 divided by 11 = 1 8/11
Two dice are rolled and their sum is a recorded.find each probability