Easy. that is 24. if you divide 2/5 of 60...well u just need to know that it is 24
$14.00 is the answer because you have to multiply $69.98 by 20% and that will give you 13.99 but you round it off and you will get $14.00
First, write an equation system based on the problem
For an instance, d stands for the number of dimes and n stands for the number of nickels. Dime's worth $0.10 and nickel's worth 0.05
"Pudge had 2.25 dimes and nickels" could be written as
⇒ 0.10d + 0.05n = 2.25 (1st equation)
"He had twice as many dimes as nickels" could be written as
⇒ d = n (2nd equation)
Second, solve the equation system
Substitute d as n from the second equation to the first equation to find the number of nickels
0.10d + 0.05n = 2.25
0.10n + 0.05n = 2.25
0.15n = 2.25
n = 2.25/0.15
n = 15
Because d = n, therefore d = 15
Pudge has 15 coins of dimes and 15 coins of nickels
Answer:
D. it balances differences between participants across experimental groups.
Step-by-step explanation:
A. it eliminates experimenter expectancy effects.
this is the effect of <em>random sampling</em>
B. it ensures that the samples are representative of the population.
this needs <em>minimum sample size and random sampling</em>
C. it magnifies the validity of the operational definitions used in the study.
Not true, <em>doesn't magnify</em> the validity
D. it balances differences between participants across experimental groups.
<em>True</em>
