# Changing The Subject Of A Formula

8 Questions | Total Attempts: 548  Settings  • 1.
What is the subject of the following equation  h=2x+7y
• 2.
Change the subject of this equation to C=2πr
• A.

R=C/2π

• B.

R=2Cπ

• C.

R=2π/C

• D.

R=2Cπ

• 3.
When changing the subject of an equation, if you divide the left side of your equation by a Y, what do you need to do to the right side of the equation?
• A.

Multiply by Y

• B.

Divide by Y

• C.

• D.

Subtract Y

• 4.
The value of U in the equation r=2x+U  when x =3 and r = 10.
• 5.
Make the subject of the formula in the following equation x - 2c = b
• A.

X=b+2c

• B.

X=b-2c

• C.

X=2c/b

• D.

X=2b/ c

• 6.
True or false: To get rid of the square root when transposing we square both sides of the equation.
• A.

True

• B.

False

• 7.
True or false: To get rid of the square symbol when changing the subject of a formula we can cube root both sides of the equation.
• A.

True

• B.

False

• 8.
The steps used when making x the subject of this formula 7x2-4r=k
• A.

Add 4r to both sides, divide both sides by 7 and square both sides of the equation.

• B.

Subtract 4r to both sides, divide both sides by 7 and square root both sides of the equation.

• C.

Add 4r to both sides, multiply both sides by 7 and square root both sides of the equation.​

• D.

Add 4r to both sides, divide both sides by 7 and square root both sides of the equation.

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