At a student art fair, 100 projects were on display. Of all the 3
art projects, were paintings and were photographs.
4.
5
How many of the projects were photographs or paintings?

90 projects in all 1/5 were photographs 1/5 of 90=90/5=18

Step-by-step explanation: done :)

i cannot see the numbers, can you type them out??

Step-by-step explanation:

i can add answer once you tell me

6, 10

9, -13

12, -21

18, -23

step-by-step explanation:

you just add 6 to the x-coordinate and subtract 10 from the y-coordinate.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!