Answer:
Step-by-step explanation:
we need a 4-digit number from the numbers (without repetition ).
possible number at thousand place
Possible numbers at hundred place
Possible numbers at place
possible number at unit place
<em>So total possible numbers</em>
<u>Other method :</u>
We are taking numbers out of and here order matters so we will use permutation.
Total possible numbers
Andrew must get a 74 for his average to be at 70 percent. you can plug and chug in your calculator or use an equation like this one (64+69+73+x)/4=70 ; solve for x and your number should be 74
Answer:
81
Step-by-step explanation:
Average | x = 81
Count | n = 5
Sum | Sum = 405
Solution:
The average (mean) is equal to the sum of all the data values divided by the count of values in the data set.
Average = Sum / Count
= 405 / 5
= 81
Step-by-step explanation:
This problem bothers on the density of substances
Given data
Mass of substance m= 16kg
Volume of substance v = 2L
the equation that relates the volume. V. to the mass, m is the expression for density
ρ= mass/volume
Substituting our given data
ρ= 16/2= 8kg/L
Using the density calculated above we can get the volume liters, of 128kg of liquid
8= 128/v
v=128/8
v= 16L
The volume is 16L
The density of a substance is expressed as the mass per unit volume
Answer:
See solution
Step-by-step explanation:
Use formula for the binomial expansion:
Note that
1. For the expression
2. For the expression
3. For the expression
4. For the xpression
5. In the expansion of each term has the degree of 8. Since product has degree 2+3=5, this term is not possible. Since product has degree 1+8=9, this term is not possible. Similarly, term has degree 6+5=11 and is not a term of expansion Products have degree 8 (5+3=8=4+4=8=1+7), these products are possible terms with corresponding coefficients.