(12x3-3^2)+5 what is the answer

He needs to buy 7 boxes of carpet squares.

What is unitary method?

The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.

Total number of carpets Mr. Cullenneed =91 carpet squares

Total number of carpets Mr. Cullen have= 49 carpet squares.

number of carpets Mr. Cullen need to complete

=91 - 49

= 42 carpets squares

So, Mr. Cullen needs 42 carpets squares.

If each carpet is sold in making boxes of 6. He needs

=42/6

=7 boxes

Hence, He needs to buy 7 boxes of carpet squares.

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Answer:

A= 57° , a= 7.79  and c = 14.30

Step-by-step explanation:

In a given right triangle,

We have, b =12 ,B =33° and C =90°

We can find Angle A.

Angle sum property of triangle:

i.e A + B + C = 180°

A + 33° + 90° = 180°

A = 57°

Next, by using trigonometry

tanB = Perpendicular /Base  = a /b

Here B =33° , a = ? , b = 12

So, tan 33° = a/12

0.6494 = a/12

a = 7.79

So we got a and b. By using Pythagoras theorem we determine c.

c^2 = a^2 + b^2

c^2 = 7.79^2 + 12^2

c = √(2046841) = 14.30