Ill give u the answer hold up i gotta do the work
Answer:
Sally is 63
Step-by-step explanation:
Represent Sally's age by x and Sam's by y.
Then x = 3y and x + y = 84.
Substituting 3y for x in the second equation, we get:
3y + y = 84, or 4y = 84, or y = 21. Since Sally is 3 times as old as Sam, we multiply 21 by 3: Sally's age is 3(21 years) = 63 years
Answer:84.82 volume nearest tenth is = 84.8
Step-by-step explanation: Find the number in the tenth place
88 and look one place to the right for the rounding digit
22. Round up if this number is greater than or equal to
5 5 and round down if it is less than
5.5
Answer:
7.61577310586
Step-by-step explanation:
Pythagoras Theorem 7 squared + 3 squared= 49+9=58
basically the answer is 2n-1 2n comes from the difference to get from 1 to three and the -1 from 2n to get to 1 you need to minus 1 so you get -1
