Answer:
z < 8
Step-by-step explanation:
Add 3 to both sides
8 > z OR z < 8
Answer:
[A]
Step-by-step explanation:
Number of weekend minutes used: x
Number of weekday minutes used: y
This month Nick was billed for 643 minutes:
(1) x+y=643
The charge for these minutes was $35.44
Telephone company charges $0.04 per minute for weekend calls (x)
and $0.08 per minute for calls made on weekdays (y)
(2) 0.04x+0.08y=35.44
We have a system of 2 equations and 2 unkowns:
(1) x+y=643
(2) 0.04x+0.08y=35.44
Using the method of substitution
Isolating x from the first equation:
(1) x+y-y=643-y
(3) x=643-y
Replacing x by 643-y in the second equation
(2) 0.04x+0.08y=35.44
0.04(643-y)+0.08y=35.44
25.72-0.04y+0.08y=35.44
0.04y+25.72=35.44
Solving for y:
0.04y+25.72-25.72=35.44-25.72
0.04y=9.72
Dividing both sides of the equation by 0.04:
0.04y/0.04=9.72/0.04
y=243
Replacing y by 243 in the equation (3)
(3) x=643-y
x=643-243
x=400
Answers:
The number of weekends minutes used was 400
The number of weekdays minutes used was 243
Li can expect to roll a one 4 times.
Since there are six possibilities (1, 2, 3, 4, 5 & 6), you divide 24 and 6 to get 4.
Answer:
<u>Range = 1 1/4</u>
Step-by-step explanation:
Range = Maximum - Minimum
Arranging the data in ascending order :
- <u>1/2, 5/8, 3/4, 1 1/4, 1 1/2, 1 3/4</u>
<u />
Solving for range :
- Range = 1 3/4 - 1/2
- Range = 1 3/4 - 2/4
- Range = 7/4 - 2/4
- Range = 5/4
- <u>Range = 1 1/4</u>
