Answer:
The number is 7.
Step-by-step explanation:
In this case we have an unkown variable that is a number. We will call this number by "x", this is what we want to calculate. In the first part it is said that the number or x is added to the numerator and in the second part it is said that twice the number is added to the denominator, and that this fraction is equal to 1/3. So we have:
1/3 = (12 + x)/(43 + 2*x)
43 + 2*x = 3*(12 + x)
43 + 2*x = 36 + 3*x
43 - 36 = 3*x - 2*x
x = 7
The number is 7.
Answer:
60 and 35
Step-by-step explanation:
Let:
First number = x
Second number = y [ y > x ]
According to question:
x + y = 95
= > y = 95 - x .... ( i )
y = x + 25 ...... ( ii )
From ( i ) and ( ii ) we get:
95 - x = x + 25
= > 2x = 70
= > x = 35
y = 95 - x [ x = 35 ]
= > y = 60
Therefore numbers are 60 and 35.
Answer:
1. 40
2. 52
Step-by-step explanation: 1. Subtract 16 from 36 then multiply by 2
2. Subtract 4 from 472 then divide by nine
Answer:
The people can seat themselves in 20160 different ways.
Step-by-step explanation:
Arrangements of n elements:
The number of arrangements of n elements is given by the following formula:
In this question:
For the first seat, that is, the driver seat, 4 possible people can sit.
For the remaining 7 seats, the number of ways in which the people can sit is an arrangement of 7 elements. So
The people can seat themselves in 20160 different ways.
Answer:
(-6/10)+(2/8)
Step-by-step explanation:
Adding -7/10 and 1/10 gives us -6/10
Adding 2/8 and -4/8 gives us 2/8
