Answer:
Multiply equation
by 5 and
by 4
Step-by-step explanation:
Given:
Equations are 
To find: constant by which each equation should be multiplied to eliminate the variable
in the given system of equations
Solution:

Multiply equation (i) by 5 and (ii) by 4 to get the following equations:

On subtracting these equations, we get

So, the variable
gets eliminated
Answer: 6i) 6a² - 2ab
6ii) -2b³
6iii) b³ + 7b² - 49b
<u>Step-by-step explanation:</u>
6i) (a + b)(5a - 3b) + (a - 3b)(a - b)
= 5a² - 3ab + 5ab - 3b² + a² - ab - 3ab + 3b²
= 5a² + 2ab - 3b² + a² - 4ab + 3b²
= 6a² - 2ab
6ii) (a - b)(a² + b² + ab) - (a + b)(a² + b² - ab)
= a³ + ab² + a²b - ab² - a²b - b³ - (a³ + ab² - a²b -ab² + a²b + b³)
= a³ - b³ - (a³ + b³)
= a³ - b³ - a³ - b³
= -2b³
6iii) (b² - 49)(b + 7) + 343
= b³ + 7b² - 49b - 343 + 343
= b³ + 7b² - 49b
You are allowed a maximum of 3 questions.
Please post #7 on a different question.
Answer:
Apples: 5/8 or 62.5%
Oranges: 3/8 or 37.5%
Step-by-step explanation:
You would figure this out because Aran has 5 apples and 3 oranges and if you’re trying to find the percentage to total number of fruits you have, it would be 5 apples/ 8 fruits and 3 oranges/ 8 fruits.
Hope this helped :)
The perimeter of a triangle is the sum of its side lengths.
Answer:
The answer is 94
Step-by-step explanation:
divide 7/10 because thats the fraction = 0.7
divide 65.8 by 0.7
to get 94
to check
multiply 94 by 0.7