81 .

If 1/x + 1/y = 1/4 & 1/x-1/y=3/4, then x

If 1/x + 1/y = 1/4 & 1/x-1/y=3/4, then x

A.1/4

B. 1/2

C. 1

D.2

View AnswerAns: 2
82 .

If 2x+y=y+14, then x

If 2x+y=y+14, then x

A.7/2

B. 7

C. 14

D.21

View AnswerAns: 7
83 .

Solve for y equation y+11/6-y+1/9= y+7/4, y=?

Solve for y equation y+11/6-y+1/9= y+7/4, y=?

A.-1

B. 7

C. 1

D.-1/7

View AnswerAns: -1/7
84 .

A school has 20 teachers, one of them retires at the age of 60 years and a new teacher replaces him, this change reduces the average age of the staff by 2 years, the age of new teacher is

A school has 20 teachers, one of them retires at the age of 60 years and a new teacher replaces him, this change reduces the average age of the staff by 2 years, the age of new teacher is

A.28 years

B. 25 years

C. 20 years

D.18 years

View AnswerAns: 20 years
85 .

In a certain language "to be polite" is coded as "fa so la", "she is polite" is coded as "so me pa" and "to have manners" is coded as "na la ma". Which of the following is the code for "be" in that language?

In a certain language "to be polite" is coded as "fa so la", "she is polite" is coded as "so me pa" and "to have manners" is coded as "na la ma". Which of the following is the code for "be" in that language?

A. so

B. fa

C. la

D.me

View AnswerAns: fa