Answer:
false i think
Step-by-step explanation:
Turn the mixed number in to a fraction
7/4 x 2/5
14/20 = 7/10
7/10, Hope this helps!
Answer:
Step-by-step explanation:
7y+5+3y+5=70
10y+10=70
10y=60
y=6
7(6)+5= 42+5= 47
3(6)+5= 18 + 5 =23
47+23= 70
Answer:
x=-15/8 or -1 7/15 OR x=-5/3 or -1 2/3
Step-by-step explanation:
Subtract 15 from both sides
8x=-15
Divide 8 on both sides
Now you get your answer
x=-15/8 or -1 7/15
OR
Combine like terms
9x+15=0
Subtract 15 from both sides
9x=-15
Divide 9 from both sides
x=-15/9
Simplify
x=-5/3 or -1 2/3
Answer:
The expected number of students is 79
Step-by-step explanation:
She find that she can model the data with the normal distribution. The formula for normal distribution is expressed as
z = (x - u)/s
Where
x = the time it takes for Ivy Tech students to travel to school.
u = mean time
s = standard deviation
From the information given,
u = 27.5 minutes
s = 5.2 minutes
The probability that a student's commute time would be less than 22.3 minutes is expressed as
P(x lesser than 22.3)
For x = 22.3
z = (22.3 - 27.5)/5.2 = - 1
Looking at the normal distribution table, the corresponding value for a z score of - 1 is 0.15866
The number if students out of 500 whose commute time would be less than 22.3 minutes would be
0.15866 × 500 = 79