Perform the operations indicated. Simplify the answer whenever possible.
A. 
B. 
C. 
D. 
Answer: B
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Verify the identity.
= - 
What will be an ideal response?
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. An insurance company is willing to insure the concert for $150,000 against rain for a premium of $30,000. If he buys this policy, what are his expected earnings from the concert?
A. $180,000 B. $300,000 C. $270,000 D. $239,400
Solve the problem.A biologist recorded 3 snakes on 16 acres in one area and 8 snakes on 28 acres in another area. Let y be the number of snakes in x acres. Write a linear equation for the number of snakes.
A. y = 
x - 
B. y = 
x + 
C. y = 
x + 
D. y = - 
x + 
Solve the application involving the slope of a line.Recently, a stock split and the value per share increased. The stock was valued at $11 per share 3 days after the stock split and at $35 per share 11 days after the split. The equation 
models the relationship between the stock's value, V , in dollars, and the number of days, t , since the stock split. Find the slope and give its meaning.
A. m = -3; During this period, the value of the stock decreased at the rate of $3 per day. B. m = 2; During this period, the value of the stock increased at the rate of $2 per day. C. m = 3; During this period, the value of the stock increased at the rate of $3 per day. D. m = -2; During this period, the value of the stock decreased at the rate of $2 per day.