A parent-teacher committee consisting of 4 people is to be formed from 21 parents and 5 teachers. Find the probability that the committee will consist of all teachers.

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or  

what's the question?

step-by-step explanation:

there is no question.

y= 2x+7

changed to y= 5x +7

as slope is increased from 2 to 5

therefore it would be less steeper

so, option d) is correct

b

step-by-step explanation: