Line c has a positive slope since it goes from -5 to -3. and kind d’s slope is 2/5 which is also positive so the answer is a)
1 nickels =$0.05
1 dime= $0.1
let the number of nickels be x and that of dimes be y.
total number of coins is given by:
x+y=42
hence:
y=42-x.......i
total amount of cash will be:
0.05x+0.1y=3.30.........ii
substituting i in ii we get:
0.05x+0.1(42-x)=3.30
0.05x+4.2-0.1x=3.3
-0.05x=-0.9
x=-0.9/(-0.05)
x=18
hence the the number nickels is x=18, the number of dimes will be y=42-x=42-18=24
Time each dog spent sleeping during each of two conditions
Answer:
Step-by-step explanation:
Let the distance be d
<u>Then the time in travel is</u>
- d/60 one way, d/50 on return
<u>The round trip would take 1/2 hours longer if the average speed was 55 mph</u>
- d/60 + d/50 = 2d/55 + 1/2
- d/60 + d/50 - 2d/55 = 1/2
LCM(60,50,55) = 11*12*5*5 = 3300
- 55d/3300 + 66d/3300 - 120d/3300 = 1/2
- d/3300= 1/2
- d = 1650 miles
Answer:
Mean = 50
Step-by-step explanation:
<em>Step 1: Write the mean formula</em>
Mean = sum of data/ total number of data
<em>Step 2: Calculate the sum of data</em>
35 + 40 + 45 +50 + 55 + 60 + 65 = 350
<em>Step 3: Find the total number of data</em>
Total number of data = 7
<em>Step 4: Calculate the mean</em>
Mean = sum of data/ total number of data
Mean = 350/7
Mean = 50
Therefore, the mean of this data is 50.
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