how to make the number 70 using the numbers 1,2,3,4 only once. you can use exponents, turn the numbers into double digits (for example 12+3^4)

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

a precentage of 6th graders. the population is all 6th graders. let me know if i'm wrong, i hope this ! : )

step-by-step explanation:

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!