Solve.x2 + y2 = 113x + y = -15
A. x = 7, y = -8; x = 8, y = -7
B. x = -7, y = -8; x = -8, y = -7
C. x = -7, y = 8; x = -8, y = 7
D. x = 7, y = 8; x = 8, y = 7
Answer: B
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The probability of a radar station detecting an enemy plane is 0.55. If 100 stations are in use, what is the expected number of stations that will detect an enemy plane?
A. 100 B. 55 C. 0 D. 98 E. none of these choices
Refer to the following recipe to first estimate the answer and then use multiplication or division to find the exact answer. Simplify. Old Grandma's Fork Cookies 1
cups brown sugar 1
cups white sugar 1
cups shortening 1 pinch salt 3 eggs 2
tsp soda 2
/> tsp cream of tartar 1
tsp vanillaCream sugars and shortening. Beat in remaining ingredients. Add flour to stiffen like regular cookie dough. Roll into balls, then flatten with a fork. Cook until brown.Find the amount of cream of tartar needed if you take 
times the recipe.
A. Estimate: 6 tsp
Exact: 3
tsp
B. Estimate: 3
tsp
Exact: 6 tsp
C. Estimate: 4 tsp
Exact: 3
tsp
D. Estimate: 4 tsp
Exact: 3
tsp
Write the number in standard form.2.4926 × 105
A. 2,492,600 B. 249,260 C. 24,926 D. 124.63
Find the location and value of each local extremum for the function.
A. None B. (0, 0) C. (-2, 5), (2, 5) D. (-2, 5), (0, 0), (2, 5)