Answer:
36
Step-by-step explanation:
Ejiro + her sister's age = 64
Ejiro is 8 years older so (64 - 8) ÷ 2 = 28 her sister is 28 years old and ejiro is 28 + 8 = 36 years old
Short answer: 2 * sqrt(13)
Remark
There are a number of ways to look at this. I'll pick the easiest.
Step one
Factor 52 until there are no more prime factors to be used.
52 = 2 * 26
52 = 2 * 2 * 13. That's as far as you can go.
Rule
For every 2 equal prime factors, 1 of them can be taken out side of the root sign. The other one disappears.
sqrt(52) = sqrt(2*2* 13) = 2*sqrt(13)
Answer 2sqrt(13) <<<< answer
Answer:
Benchmark fractions: 4/12 5/12 6/12 7/12
Mixed Fractions: 1 1/2 2 3/4 5 1/4 8 2/8
Step-by-step explanation:
A mixed fraction is simply a fraction with a whole number.
A benchmark fraction is a fraction used to compare and order other fractions.
Subtract 5a from both sides
-3=3a+6
Subtract 6 from both sides
-9=3a
Divide by three
a= -9/3 (which is -3)
Remember what you do to one side you must do to the other
Answer:
Step-by-step explanation:
X no of questions student answers is binomial with n =40 and p =0.5
If approximated to normal, X is Normal with
mean = np = 20 and variance = npq = 10
P(X>N) >0.10
We use std normal distribution table to get z value first then convert to x value
So 
This is with continuity correction.
Hence without continuity correction this equals 7.2-0.5 = 6.7
x>6.7
n = 7
