Answer:
Below.
Step-by-step explanation:
One method is by Trial and Improvement.
Example: Find the cube root of 20.
We know that cube root of 8 is 2 and cube root of 27 is 3 so the cube root of 20 is between 2 and 3.
So we could try 2.5:
2.5^3 = 6.25 * 2.5 - Use long multiplication to get 15.625.
So we need to go higher so we try 2.6*3:
= 17.576
2.7^3 = 19.683.
2.8^2 = 21.952.
The results are either side of 20 with 19.683 the closest.
So we can say that the cube root is 2.7 to the nearest tenth.
Further calculations are necessary to get an answer correct to the nearest hundredth.
This is a rather long process.......
Answer:
-13, -17, -21.
Step-by-step explanation:
All you have to do is subtract it by 4 each term.
Answer:
9.4km
Step-by-step explanation:
6.2^2 +7.1^2 = x^2
so 38.44+ 50.41= 88.85
x^2= 88.85 so x = 9.4
Sorry if it's really confusing lol, if you need help i could explain it further but your answer is 9.4
Answer:
Speed = distance/time
First 2km:
time = distance/speed
time = (2km) / (12km/hour) = 1/6 hours
Time remaining to get to 1 hour = 1-(1/6) = 5/6 hours
Distance remaining to finish the race = 10km-2km = 8km
speed = 8km/(5/6 hours) = (8*6)/5 = 9.6 km/h
Maintain an average speed of 9.6 km/h
Step-by-step explanation:
Answer:
x = 5 ± sqrt(35)
Step-by-step explanation:
X^2 - 10x+ 25 = 35.
Factor the left hand side. This is the difference of squares. a^2 -2ab - b^2 = (a-b)^2 where a = x and b = 5
(x-5) ^2 = 35
Take the square root of each side
sqrt((x-5) ^2) =± sqrt(35)
x-5 = ± sqrt(35)
Add 5 to each side
x-5+5 = 5 ± sqrt(35)
x = 5 ± sqrt(35)
