To solve the two equations simultaneously using the substitution method we need to rearrange one of the equation to make either

or

the subject.
We can try in turn rearranging both equations and see which unknown term would have been easier to solve first
Equation

Making

the subject

, dividing each term by 2

⇒ (Option 1)
Making

the subject

, multiply each term by 8 gives

⇒ (Option 2)
Equation

Making

the subject

, divide each term by 3

⇒ (Option 3)
Making

the subject

, divide each term by 8

⇒ (Option 4)
From all the possibilities of rearranged term, the most efficient option would have been the first option, from equation

with

as the subject,
64/2=32-12=20 Barry has 20 butterflies left in his collection
Answer:
Width is 2 and Length is 6
Step-by-step explanation:
- As the data is given, the area of a playground is 12 square yards.
- The length of the playground is 3 times longer than its width.
- Let width is x, length is 3 times therefore, length = 3x
As we know the formula for area,
So by putting values in this formula,
=> 3x2 = 12
=> x2 = 12/3,
=> x2 = 4 ,
by taking square root we get x= 2,
- the width is 2 and length is 3 times hence, length is 3(2) = 6.
Answer:
C
Step-by-step explanation:
Remark
You must do the changes in order. Add 1 then multiply by 2
- First entry: 6
- Add 1: 6 + 1 = 7
- Multiply by 2 = 2*7 = 14
- Add 1: 14 + 1 = 15
- Multiply by 2: 15 * 2 = 30
Answer: 7 14 15 30
Fx=2x2-x-6 Gx=x2-4
Fx÷Gx
2x2-x-6/x2-4
Simplify
2x+3 x-2/ x-2 x+2
You can cancel out x-2 since they are on both top n bottom
2x+3/x+2 answer is C