10+10+10=30
5+5+10=20
4+4+5=13
5+5×2=

15

Step-by-step explanation:

Sorry about the first time,

so if you follow the order of operations you would do multiplication first so 5*2=10 then following up with addition so add five to get 15.

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

the factors of 24 are 1, 2, 3, 4, 6, 8, 12 and 24. hope this ! mark brainliest! you v much! : )