The dimensions of a blackboard are 9/10 of a meter by 7/10 of a meter. in drawing of the blackboard given below, 1/2 of a inch represents 2 meters. what is unit rate of area in square meters of the blackboard per square inch of area in the drawing?

16 square meters per square inch

Step-by-step explanation:

we know that

The scale drawing is

That means ---> 1 in in the drawing represent 4 meters in the actual

Find the dimensions of the blackboard in the drawing

Divide by 4

Find the area of the blackboard

Find the area in the drawing

Find out the unit rate of area in square meters of the blackboard per square inch of area in the drawing

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

i hope this is what you were looking for.

see attached graph