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If the workers at a firm successfully negotiate a wage increase,
a. The demand curve for the product the firm produces shifts rightward.
b. The demand curve for the product the firm produces shifts leftward.
c. The supply curve for the product the firm produces shifts rightward.
d. The supply curve for the product the firm produces shifts leftward.

I say it is d, is this correct?

On a supply-and-demand diagram, quantity demanded equals quantity supplied________________.
a. only at the single equilibrium price
b. at every price at or above the equilibrium price
c. at every price at or below the equilibrium price
d. at every price

I say it is a, is this correct?

Expectation of lower future prices is a___________.
a. rightward shifter of AD
lb. eftward shifter of AD
c. reason for moving up along AD
d. reason for moving down along AD

I say it is d, is this correct?

A decrease in the price of electricity will cause_____________.
a. a movement down the AS curve
b. a movement up the AS curve
c. a leftward shift in the AS curve
d. a rightward shift in the AS curve

I say it is a this correct?

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9. How are the planes positioned when a system of linear equations in three variables is independent?

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2x-y+3z =14
x+y-2z =-5
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