Let's begin by calling Sarah's age now as X. As Ralph is 3 times as old as Sarah, X times 3 = 3X. Hence, Ralph's age is 3X. In six years, Ralph will be twice as old as Sarah. To calculate six years from now, add 6 to X for Sarah, and 6 to 3X for Ralph. As Ralph is twice as old as Sarah and we want to find the difference between the ages to calculate X, multiply X+6 by 2. You'll get 2X+12. Therefore, 2X+12=3X+6. Deduct 6 from 3X+6 as we want to isolate the variable. Because you did that to one side, you have to deduct 6 from 2X+12. Hence, now you have 2X+6=3X. X=6. Ralph's age is 3X, so 6 times 3 is 18. Ralph is 18 years old.
Answer:
448 kilometers
Step-by-step explanation:
So, since the car goes 112 kilometers in one hour, you need to multiply 112 by 4.
112*4=448
The police car drives 448 miles in 4 hours.
She needs 5 cups of flour and 3 cups of sugar.
Answer:
72+ 48i
Step-by-step explanation:
Answer:
1) 973,201,146
2) 6,843,329,001
3) 947,850,063
4) 502,930
5) 17,900,001
6) 792,214
In words :-
1) Nine hundred seventy three million two hundred one thousand one hundred forty six
2) Six billion eight hundred forty three million three hundred twenty nine thousand one
3) Nine hundred forty seven million eight hundred fifty thousand sixty three
4) Five hundred two thousand nine hundred thirty.
5) Seventeen million nine hundred one
6) Seven hundred ninty two thousand two hundred fourteen.