I don’t understand the equation someone help me
2 answers:
For the first one, since x=5, we would substitute 5 for x in the expression:
So, it would be 5^2, which means 5 multiplied by itself 2 times, so it would be 5×5 which is 25.
For the next one, it's asking:
So if we substitute 5 for x, we get:
Which means 1 multiplied by itself 5 times, so it would be 1×1×1×1×1 which equals 1.
Finally, we have:
So again we substitute 5 for x to get
Which means 5 multiplied by itself one time which is just 5.
So, it would be 5^2, which means 5 multiplied by itself 2 times, so it would be 5×5 which is 25.
For the next one, it's asking:
So if we substitute 5 for x, we get:
Which means 1 multiplied by itself 5 times, so it would be 1×1×1×1×1 which equals 1.
Finally, we have:
So again we substitute 5 for x to get
Which means 5 multiplied by itself one time which is just 5.
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Answer:
60 m/h
Step-by-step explanation:
1. the basic formula is Time=Distance/Speed;
2. total time is time1 (for 84 miles)+time2 (for 130 miles)=time (4 hours);
3. the time for the first 84 mi. is time1=84/S;
4. the time for the rest 130 mi. is time2=130/(S-10);
5. using all the data of items 2-4, it is possible to substitute into the basic formula and resolve an equation:
note, that the value of speed has one condition: s>10. It means, the only value is true: 60 miles per hour.