exam Maths Puzzle Numerical Ability

11/12 divided -7/8
How do I solve this equation

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exam Other Question

please help?

Write each system as a matrix equation. Identify the coefficient matrix, the variable, matrix, and the constant matrix.

{r-s + t = 150
2r + t = 425
s + 3 Can you verify my answers for the following questions? For #1 I got 6.3 m and for #2 I got 7.6 m. Are these correct?

1) A homeowner wishes to insulate her attic with fiberglas