Answer:
.
Step-by-step explanation:
Let the unknown fraction be
,
where, x and y both are prime numbers less than 20.
Now, it is given that adding 1 to both numerator and denominator will make the fraction
.
Thus,
= 
2(x + 1) = y + 1
2x + 2 = y + 1
2x + 1 = y.
Clearly if x will be any odd number , two times x will be odd and adding 1 to it will result in even number and y should be even number , which is not possible as only even prime is 2.
Thus , x should be the even prime which is 2.
And y will be 5.
Thus the required fraction is
.
⭐x=7 because
10x+65=135
10x=70
x=7
28=4y-4
32=4y
⭐y=8
I hope this helps
12+34 = 46
Please mark Brainliest if this helps!
For question 40 the answer is B
Answer: 7/145
Step-by-step explanation:
The probability that the first student walks to school will be: = 7/30.
The probability of selecting the second student that walks to school will be: = 6/29.
Then we multiply both together and this will be:
= 7/30 × 6/29
= 7/145