Answer:
1 cubic inches
Step-by-step explanation:
No of cubes = 8
Edge length of each cube = 1/2 inch
Volume of cube is given where edge is the edge length
Thus volume of cube with Edge length is calculated as explained below
Question states that there are 8 such cubes joined to make a right rectangular prism. Thus volume of right rectangular prism will be sum of volume of 8 such cubes.
volume of right rectangular prism = 8 times the volume of 1/2 inched cubes
= 8* 1/8 = 1 cubic inches
Thus volume of right rectangular prism is 1 cubic inches.
Suppose the number of 2 hours lessons are x and 1 hour lessons are y; thus,
2x+y=25
50x+30y=690
to get the values of x and y we solve the quadratic equation given;
from the top equation:
y=25-2x.......i
substituting i in our second equation we get:
50x+30(25-2x)=690
50x+750-60x=690
-10x=-60
thus;
x=6
hence we conclude that the number of 2 hours classes are 6 hours
Answer:
I think it would be 13
Step-by-step explanation:
mines been good. hbu??? I have drank water today.❤