Factorise the following expressions 5x^2-25xy
1 answer:
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<h2>SOLVING</h2>
What type of number is Select all that apply
Let's start by taking a look at all the four sets of numbers.
<h2>A: Whole number</h2><h3>{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22...∞}</h3>The set is shown above. To be honest, this is an infinitely small part of the number set; the whole number set would take FOREVER to type ;)
<h2>B: Integers</h2><h3>{∞...-2,-1,0,1,2,3,4,5,6,7,8,9...∞}</h3>Wow, this set starts at negative infinity and ends at positive infinity!
<h2>C: Rational</h2>This set consists of all integers, decimals, and fractions.
<h2>D: Irrational</h2>That's where the desired number belongs!
<em>∞</em>
Answer:
It takes 1.68 hours to catch up to them.
Step-by-step explanation:
The speed of robber = 71 mph
The speed of police = 78 mph
The police start 10 minutes later
by that time robber would have travelled
10 minutes =0.166667 hours
then the distance = 11.8 mph
Let them meet at distance x from the bank.
time taken by police to reach x , time =----------------------(1)
time taken by robber in the same time = ---------------(2)
Equating (1) and (2)
71x =78x - 920.4
920.4 = 78x - 71x
920.4 = 7x
x = 131.48
The distance where they catch up with the robber from the bank is 131.48 miles
speed of police = 78 mph
distance = 131.48 miles
time they catch up =
= 1.68 hours