Answer:
1/3
Step-by-step explanation:
The probability of a student winning is 1/4.
The probability of a prize being selected is 1/3.
The probability of Gail winning a scarf is 1/4 × 1/3 = 1/12.
The probability of Simon winning is 1/4.
The probability of either is 1/12 + 1/4 = 1/3.
Answer:
Step-by-step explanation:
8y + 11 = 4(y - 2)
8y + 11 = 4y -8
subtract 4y from both sides
4y + 11 = - 8
subtract 11 from both sides
4y = -11
divide by 4 on both sides
y = -2.75 or - y = 2.75
if you need a fraction it would be 2 3/4
Answer:
x=9/y
Step-by-step explanation:
1)divide both sides by (2y)/3
2/3xy/2y/3=6/2y/3
x=9/4
Answer:
v=-4
Step-by-step explanation:
isolate the variable by dividing each side by factors that don't contain the variable.
Answer:
1
Step-by-step explanation:
note that i = , thus
i² = ( )² = - 1
= i² × i² = - 1 × - 1 = 1