A word or phrase used to describe a thing or to express a concept, especially in a particular kind of language or branch of study.
Given :
Xinran walks 3 mi/h uphill, 4 mi/h on flat land and 5 mi/h downhill.
To Find :
If he walks one mile uphill, then one mile on flat land and then returns by the same route to his starting point, how many minutes does he walk.
Solution :
Time taken to walk one mile uphill is :
Time taken to walk two mile on flat land( one on going and one or returning ) is :
Time taken to walk one mile downhill is :
Total time taken :
Therefore, time taken un 62 minutes.
Answer:
No, triangles CDE and HGF are not necessarily congruent.
Step-by-step explanation:
Notice that just having one angle equal in value doesn't make the triangles congruent. To start with, we know that the three internal angles of a triangle must add up to 180 degrees, but all we know when one is 50 degrees, the other two must add up to 130 degrees, which can be done by an infinite number of different angle combinations: 110 + 20, 90 + 40, 80 + 50, etc.
Answer:
Step-by-step explanation:
First, what's a polynomial? It's an algebraic expression whose only independent variable is x, and in which all the x powers are either zero or positive and are integers: x^3, x^2, x^1, x^0 (for example).
Looking at possible answer choice A, we immediately reject this because that power of x is in the denominator, representing 2x^(-3). This negative power of x is not allowed. Reject A.
In B, we have the powers x^2, x^1 and x^0. Great. This is a polynomial.
In C, we have x^2 + 1 in the denominator of the final fraction. Reject this because of the final term.
In D, we have x^2 + 2x + √
