Answer:
27.5 is your mean.
Step-by-step explanation:
To get this, add the figures together and divide by the number of terms.
Answer:
D' = (5, 2)
Step-by-step explanation:
Try to join D and the origin using a line. Counterclockwise means in an opposite direction of rotation of the clock hands. So draw another line towards the right which is perpendicular to the previous line to fine the answer. Remember the length of the lines should be equal.
Answer: 25 bikes and 55 cars were used.
Step-by-step explanation:
Let b represent number of bicycles that the students ride to school.
Let c represent number of cars that the students drive to school.
At Billy's school, 80 students come to school by bike or car. It means that
b + c = 80
A bike has 2 wheels. A car has 4 wheels. Together the vehicles that arrive at the school have 270 wheels. It means that
2b + 4c = 270- - - - - - - - - - 1
Substituting b = 80 - c into equation 1, it becomes
2(80 - c) + 4c = 270
160 - 2c + 4c = 270
- 2c + 4c = 270 - 160
2c = 110
c = 110/2
c = 55
b = 80 - c = 80 - 55
b = 25
Answer:
Step-by-step explanation:
To solve this problem, you have to use the distributive property.
<u>Distributive property:</u>
⇒ A(B+C)=AB+AC
7(5+x)
Expand.
Solve.
7*5+7x
7*5=35
- <u>Therefore, the final answer is 35+7x.</u>
I hope this helps. Let me know if you have any questions.
Answer:
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