Break horizontally in middle
Area of rectangle
Area of triangle
- 1/2BH
- 1/2(20-10)(20-10)
- 1/2(10)²
- 100/2
- 50ft²
Total area
42. Because you separate 6 and 7. and 6 can be broken into 2 and 3. SO 2 times 3 times 7.
Step-by-step explanation:
arithmetic sequence means every new term is the previous term plus a certain constant.
as we can see, this constant is +4 in our case.
15 + 4 = 19
19 + 4 = 23
23 + 4 = 27
...
so, we have
a1 = 15
a2 = a1 + 4 = 15 + 4 = 19
a3 = a2 + 4 = a1 + 4 + 4 = a1 + 2×4 = 15 + 8 = 23
...
an = an-1 + 4 = a1 + (n-1)×4 = 15 + (n-1)×4
Let
S=cost of software
4S=cost of computer
Total cost = $1200
=>
S+4S=1200
solve for S
5S=1200
S=240 (= cost of software)
Cost of computer = 4*240 = $960
6.78 rounded is correct. Hope this helps! ;)
