Question

true or false
1) you must clean the CPU cabinet from the outside only
2) you must be careful not to spill food and liquid on the keyboard or monitor.
3)to open a file, select open option from the drop down list of file menu.
4) in window, opening and closing a file is very easy.
5) dust, dirt and smoke help the computer work better. ​

Answer 1

Answer:

A/B = 4/5

(A - 7)/(B - 7) = 3/4

A = 4B/5

4(4B/5 - 7) = 3(b - 7)

16B/5 - 3B = 28 - 21

B = 35

A = 4*35/5 = 28

CHECK:

A/B = 35/28 = 5/4

(28 - 7)/(35 - 7) = 21/28 = 3/4

Answer 2

Answer:

Mark me Brainlyist

Explanation:

1) True
2) True
3) True
4) True
5) False