Answer:
Sum of 2 no. 120
Let second no. be x
Therefore, first no. =x+5
Therrfore,third no. =3x
Thetefore,x+5+x+3x=120
5x+5=120
5x=115
x=23.
Therefore, 1st no.=28
Second=23
and third=69
Answer:
2,910
Step-by-step explanation:
Answer: the cost of each pencil is $0.5
the cost of each eraser is $0.15
Step-by-step explanation:
Let x represent the cost of one pencil.
Let y represent the cost of one eraser.
Becky spent $1.45 for 2 pencils and 3 erasers. This means that
2x + 3y = 1.45- - - - - - - - - -1
Luke spent $2.65 for 5 pencils and 1 eraser. This means that
5x + y = 2.65- - - - - - - - - -2
Multiplying equation 1 by 1 and equation 2 by 3, it becomes
2x + 3y = 1.45
15x + 3y = 7.95
Subtracting, it becomes
- 13x = - 6.5
x = - 6.5/- 13
x = 0.5
Substituting x = 0.5 into equation 2, it becomes
5 × 0.5 + y = 2.65
2.5 + y = 2.65
y = 2.65 - 2.5
y = 0.15
Answer:
37.7
Step-by-step explanation:
Hypotenuse is the longest side
