If you are buying 8 books, 2 of them will be $7. So there are 6 remaining books, which will cost $3.50 each. 6x$3.50=21 21+7=$28
28 dollars
I'm not sure if that is supposed to be 7 or -7
If it's -7:
1<2n-5<-7
+5 +5 +5 Add 5 to all parts of the inequality get 2n by itself
6<2n<-2
/2 /2 /2 Divide all parts by 2 to isolate the variable
3
You can use calculus ( related rates). Given the rate os change of the radius for example you can find the rate of change of volume using differential calculus.
Answer:
13
Step-by-step explanation:
104×7=728
728÷56=13
B because you have to add 30 to 60
