Answer:
x= -28
Step-by-step explanation:
Multiply both sides as in -7 and 4
x
-7= --- ---> -7 x 4= -28 = x
4
-28 = x. (Swap Sides) X= -28
Answer:
b
Step-by-step explanation:
I looked it up on the calculator.
all students = 150
M = 60
S = 45
M and S = 25
(a) At least one of the two requirements:
M or S = M + S - (M and S) = 60 + 45 - 25 = 80
(b) Exactly one of the two requirements:
(M or S) - (M and S) = 80 - 25 = 55
(c) Neither requirement:
(all students) - (M or S) = 150 - 80 = 70
