Answer:
90
Step-by-step explanation:
84+90=174
174/2=87
Answer:
15.30
Step-by-step explanation:
use code tiko
For easier notation lets use: Nn=x and Nd=y
x+y=22
5x+10y=135
Multiply the first equation by 5 to get
5x+5y=110
Now you can eliminate x by subtracting the first equation from the second
5x+10y-5x-5y=135-110
5y=25
y=5
x=17
No, it does not equal 0. Lets multiply it out and see what it actually equals.
15/25 * 25/15
15*25 / 25*15
375 / 375
Anything over itself is 1, so the final answer for the multiplication is 1.
Yes. x would be 75. For the second part yes. she would have to get 100 % on her last test.
