75 time because the proabablity of rolling any number each time is 1/10 so 250/10=25 the mutiples of 3 in 1-10 are 3,6,9 so 3*25 =75 tmes
Jony is 2 now and is 2x older than Chika. So Chika is 1 year old. This means Chika is 1 year younger than Jony. When Jony is 30, Chika is 29
If i were you, i would add one to 7x and fifteen. this gives you x^2+8x+16, a perfect square of x+4.
U right 9.88•10 in standard form like 98800000000.
