Question 1:
Looking for: "speed" (velocity: v)
Given: 112.0 meters (distance: d) 4.0 seconds (time: t)
Formula used: v=d/t
since velocity is equal to the distance (112m) divided by the time (4sec) you would have 112m/4s which is 28m/s. m/s is meters traveled per second traveling aka meters per second.
Question 2:
Looking for: average "speed" don't let the word average confuse you it is still velocity.
Given: 60km (distance: d) and 3.5 hours (time: t)
Formula required: v=d/t
Since velocity needs to be in the units of m/s first convert your time, which was provided in hours, to seconds.
3.5 hours 60 minutes per hour: 3.5 x 60= 210 minutes
210 minutes 60 seconds per minute: 210 x 60= 12600 seconds
also, kilometers needs to be converted to meters. The prefix kilo means 1000 so 1 kilometer = 1000 meters.
60 x 1000 = 60,000 meters
Plug the values into the equation required:
v=d/t
v= 60,000m / 12,600sec
v= 4.76 m/s
Answer:
Solution:
Explanation:
The goal is to solve the system by substitution following these steps:
- 1. Isolate the variable with the smallest coefficient, moving the term with the lowest coefficient so that it is alone one one side
- 2. Divide by the coefficient
- 3. Substitute
- 4. Solve
This is the application of those steps to the given system:
<u>1. Isolate the variable with the smallest coefficient:</u>
<u>2. Divide both sides by the coefficient</u>
<u>3. Substitute</u>
- 3 × [2 - 5D] / 2 + 4D = 5
<u>4. Solve</u>
- Distributive property: multiply 3 with each term inside the brackets
(6 - 15D) / 2 + 4D = 5
- Distributive property: divide each term inside the parenthesis by 2:
3 - 15D/2 + 4D = 5
- Move the number 3 to the right side (addition property of equality)
- 15D/2 + 4D = 5 - 3
- Combine like terms (add the fractions on the left and the constant terms on the right)
[- 15D + 8D] / 2 = 2
[-7D] = 4
D = - 4/7
C = [2 - 5D] / 2 = [2 - 5 (-4/7) ] / 2
C = [2 + 20/7] / 2
C = [14 + 20] / 14
C = 34 / 14
C = 17 / 7
Solution:
Two examples of mutagens would be radiation mutagens and chemical mutagens. Hope this helps!