Answer:
2.17
Answer and Explanation:
The critical value of z for 97% confidence interval is 2.17, which is obtained by using a z score table, that is: {eq}P(-2.17 < Z <...
Answer:
x=112
Step-by-step explanation:
First, let's get all of the fractions to a common denominator.
Based on the numbers given (8,56, and 7), let's make all of the denominators be 56
for 
, multiply the numerator and denominator by 7.
×
= 
we can leave 
as it is
and for 
, we cam multiply the numerator and denominator by 8
×
=
Here's the equation now:
-
+=-92
now simlify the fractions
numerators:
-49x-5x+8x=-46x
here's the fraction now:
=-92
We can simplify the fraction by 2 so it's 
=-92
now multiply both sides by 
, which is the reciprocal of 
(to isolate the variable)
×=-92×
x=112
Hope this helps!
Answer:
x = 11, y=-½
Step-by-step explanation:
Simultaneous equations - subtract the first equation from the second.
x + 4y = 9
-(x - 2y = 12)
6y = -3
y = -½
Substitute y
x + 4(-½) = 9
x + -2 = 9
x = 11
If it’s $14.00 upfront and 3 dollars per hour, subtract 14 from 32, which is 18, and divide that by 3, which is 6. She rented the bike for 6 hours.
Answer: 2.7 hours
Step-by-step explanation:
3 x 54 = 162, 162 is how many miles the drive is. If he is going 60 mph you have to divide 162/60 and you get 2.7 hours
