Which of the relations below on the set of all people are equivalence relations? Determine the properties of an equivalence relation that the others lack (i. e. not reflexive, not symmetric, etc.) (a) {(a, b) | a and b are the same age} (b) {(a, b) | a and b have the same parents} (c) {(a, b) | a and b share a common parent} (d) {(a, b) | a and b have met} (e) {(a, b) | a and b speak a common language}

answer: 59

step-by-step explanation:

y=3n + 1

step-by-step explanation:

this is wrong because it says the second number is one less and i added one instead

given : the shape of his satellite can be modeled by   where x and y are modeled in inches.

now,the given equation   is a equation of parabola.

here, coefficient of x is positive, hence the parabola opens rightwards.

on comparing this equation with standard equation , we get

in standard equation, coordinates of focus=(0,m)

thus for given equation coordinates of focus=(0,1.5)

step-by-step explanation: