Answer:

Step-by-step explanation:
The standard form of a complex number:


Answer:
x = 30
Step-by-step explanation:
-2x + 10 +4x=70
-10 -10
-2x + 4x = 60
2x = 60
/2 /2
x = 30
x= morning
y = afternoon
x + y = 10
x=10-y
5x + 6y =57
5(10-y) +6y =57
50-5y +6y =57
y=7
x=10-7 =3
check 3*5 = 15, 7*6 = 42, 42 + 15 = 57
3 morning practices
I’ll do the first one for you
5 x 2 = 10
10pi = around 31.42
You are really just multiplying the diameter by pi, if you are only given the radius, double it first