A school board has determined that there should be 3 teachers for every 50 students. How many teachers are needed for an enrollment of 2,650 students?
A. 134 teachers
B. 148 teachers
C. 159 teachers
D. 143 teachers
E. 216 teachers
Answer: C
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Provide an appropriate response. Solve the system of equations using the addition method:2x + y = 13 y = 2x+ 1
A. x = -
, y = 14
B. x = 7, y = -1
C. x = 5, y = 3
D. x = 3, y = 7
Find the probability.The table lists the eight possible blood types. Also given is the percent of the U.S. population having that type.
Let E be the event that a randomly selected person in the U. S. has type B blood. Let F be the event that a randomly selected person in the U. S. has RH-positive blood.Find P(F|E).
A. 0.818 B. 0.340 C. 0.720 D. 0.107
Find the opposite, or additive inverse.4
A. 
B. 0
C. -4
D. -4
Approximate the value using a calculator. Express answer rounded to three decimal places.3.8?
A. 66.289 B. 36.462 C. 11.938 D. 77.476