Solve Equations with Multiplicative Inverse

Determine whether the matrices are multiplicative inverses.

• Yes

• No

• Elevator

• Pi

Solve the equation. Check your solution.

• ⁵/₃ or 1 ²/₃

• ²⁴³/₁₂₅ or 1 ¹¹⁸/₁₂₅

• 1.944

• -⁵/₃ or -1²/₃

Solve the equation. Check your solution.

• 2

• ¹/₂

• 31

• 62

• 1.5

• 6

• -6

• -1.5

• m=3

• m=-4

• m=-1

• All real numbers

What should be multiplied to -3/16 to get 8/13?

• 128/39

• -128/39

• 39/128

• -39/128

Answer explanation

Let the number to be multiplied is y So, -3y/16 = 8/13 Using cross-multiplication, we get, -3y(13) = 16 × 8 i.e. -39y = 128 i.e. y = 128/(-39) i.e. y = -128/39 Hence, option 2 is correct.

• 
• 
• 

Solve for x

• 35

• 3.5

• 0.35

• -35

Solve the equation. Check your solution.

• -90

• 90

• -40

• -180

Solve the equation. Check your solution.

• ⁴/₅

• - ⁴/₅

• 4

• 28