![joco8988](/avatars/20077.jpg)
joco8988
02.11.2019 •
Mathematics
75/7×5 which choice is the most reasonable answer a 32 4/7 b 41 4/7 c 34 4/7 d 38 4/7
Solved
Show answers
More tips
- S Science and Technology Exploring Our Galaxy: How Many Planets are in the Milky Way?...
- S Science and Technology Colliders: How They Work and Why They Matter...
- A Animals and plants Unraveling the Mystery of Loch Ness: What Does the Loch Ness Monster Look Like?...
- L Leisure and Entertainment How Many Seasons are There in the TV Show Interns?...
- S Sport Playing Bowling: Rules and Advice for Novices...
- L Leisure and Entertainment The Best Film of 2010: A Look Back at the Academy Awards...
- S Sport How to Learn Swimming? Simple Tips for Beginners...
- C Computers and Internet What is Web 2.0 and How Does it Work?...
- C Computers and Internet War of Social Media: Which Platform is the Leader?...
- C Computers and Internet How to Get Rid of Spam in ICQ?...
Answers on questions: Mathematics
- M Mathematics Which number from the set {3, 5, 6, 8} makes this inequality true? 3x + 5 − 2x 11 a) 3 b) 5 c) 6 d) 8...
- M Mathematics Jamie earns £28000 in a year. jamie pays income tax at a rate of 20% on his annual earnings above £10600. how much income tax does jamie pay in a year....
- M Mathematics In which other form can you represent the number 2 1/3...
- M Mathematics Sos with this question a 6 petal flower separates this circle into 6 equal sections. see diagram below. a. how far away in cm and degrees is petal a from petal...
- M Mathematics If i have 10 dollars and i win 6 out of 10 and lose 4 out of 10 and bet 1$ each trade, how much should there be left after 10 trades?...
- M Mathematics Which number is not in the solution set of x − 6 10? a) 14 b) 17 c) 20 d) 23...
- M Mathematics If the length of side ac is 6 units, the length of side bc is 11 units, and the length of side xz is 36 units, what is the length of side yz?...
- M Mathematics The probability of a potential employee passing a training course is 86%. if you selected 15 potential employees and gave them the training course, what is the...
- M Mathematics 4. the area of a circle is 9m². calculate the circumference of the circle....
- M Mathematics What is theoretical vs practical domain in an exponential equation. plz provide an example too...
Ответ:
First of all, let's establish that we are trying to obtain the factorised expression for:
2x^2 + 18
Now, there are two main ways we can solve this problem:
1 ) Expand and then simplify each of the options until one of them gives you the correct answer.
OR
2 ) Factorise the expression to give you one of the options as your answer.
I will be doing the first method today as although it is more time-consuming, it is easier to do as if you aren't able to directly factorise the expression you can use your expanding skills instead.
STEP-BY-STEP SOLUTION:
To begin with, we will expand and simplify each of the expressions to see which one gives us the correct answer as displayed below:
OPTION A -
= ( 2x - 9 ) ( x - 2 )
= 2x^2 - 4x - 9x + 18
= 2x^2 - 15x + 18
Therefore, Option A is incorrect.
OPTION B -
= ( 2x - 6 ) ( x - 3 )
= 2x^2 - 6x - 6x + 18
= 2x^2 - 12x + 18
Therefore, Option B is incorrect.
OPTION C -
= ( 2x - 6 ) ( x + 3 )
= 2x^2 + 6x - 6x - 18
= 2x^2 - 18
Therefore, Option C is incorrect.
OPTION D -
= ( 2x - 9 ) ( x + 2 )
= 2x^2 + 4x - 9x - 18
= 2x^2 - 5x - 18
Therefore, Option D is incorrect.
Hmmm, this is weird. I think that there is a mistake in either the question or answer options as all the options ended up being incorrect.
However, I believe it would be safest to pick the closest answer which would be Option C.
ANSWER:
Option C - ( 2x - 6 ) ( x + 3 )