Answer:
Step-by-step explanation:
n and d are the number of nickels and dimes, respectively.
"there are 20 coins"
n+d = 20
d = 20-n
"total value is $1.40"
0.05n + 0.10d = 1.40
0.05n + 0.10(20-n) = 1.40
-0.05n + 2 = 1.40
0.05n = 0.6
n = 12
d = 20-m = 8
Simply multiply 45 by 2 and you get your answer which is 90 cookies
Answer:
Qinghai
Step-by-step explanation:
Answer: Hey, do you know how to screenshot images? There is also a website for Brainly if needed
Step-by-step explanation:
Answer:
She made 15 trials
Step-by-step explanation:
Well it said that she opened the book 15 times in total and records each time so the answer would be 15.