x = a number
7 + 2x = 21
Subtract 7 from both sides
2x = 14
Divide both sides by 2
x = 7
7 is the only number that makes this sentence true.
This is geometry and you have to add the numbers from adding multiplying iron subtracting or dividing
2*200*300=(200+x)(300+x)
120000=60000+200x+300x+x^2
x^2+500x-60000=0
(x+600)(x-100)=0
x=-600 or x=100
length is positive thus negative value is ignored. So answer is 100
Answer:
Step-by-step explanation:
GIVEN: The mathematics department of a college has male professors, female professors, male teaching assistants, and female teaching assistants.
TO FIND: If a person is selected at random from the group, find the probability that the selected person is a professor or a male.
SOLUTION:
Total employees in mathematics department
Total males in mathematics department
Probability that selected person is a male
Total professor (male+female)
Probability that selected person is professor
Total male professor
Probability that selected person is a male professor
Probability that selected person is a professor or a male
Hence probability that selected person is a professor or a male is