6. Set up an equation in the following cases:
(1) Irfan says that he has 7 marbles more than five times the marbles Parmit has
Irfan has 37 marbles. (Take m to be the number of Parmit's marbles.)
(in) Laxmi's father is 49 years old. He is 4 years older than three times Laxmi's
(m) The teacher tells the class that the highest marks obtained by a student in her
class is twice the lowest marks plus 7. The highest score is 87. (Take the lowes
age
(Take Laxmi's age to be y years.)
score to be l.)
(iv) In an isosceles triangle, the vertex angle is twice either base angle. (Let the bas
angle be b in degrees. Remember
that the sum of angles of a triangle is 18
degrees).
Answers
Answer:
6. Set up an equation in the following cases:
(1) Irfan says that he has 7 marbles more than five times the marbles Parmit has
Irfan has 37 marbles. (Take m to be the number of Parmit's marbles.)
(in) Laxmi's father is 49 years old. He is 4 years older than three times Laxmi's
(m) The teacher tells the class that the highest marks obtained by a student in her
class is twice the lowest marks plus 7. The highest score is 87. (Take the lowes
age
(Take Laxmi's age to be y years.)
score to be l.)
(iv) In an isosceles triangle, the vertex angle is twice either base angle. (Let the bas
angle be b in degrees. Remember
that the sum of angles of a triangle is 18
degrees).
1) Let the number of Parmit's marble be m.
According to statement -
5m + 7 = 37
2) Let Laxmi's age be y.
According to statement -
3y+4=49
3) Let the lowest score be l .
According to the statement -
2l+7=87
4)The base angle be b° and vertex angle be v° .
According to the statement -
v° + b°+ b° = 180°
v° = 180° - 2b°