4x + 7 = 99
subtract seven from both sides
4x = 92
divide each side by four
x = 23
9+90=99 (90 is ten times as much as 9)
Their sum is 99.
Smallest 2 digit number is 10. 10 + 99 = 109
The sum of 2 and 97 is 99.
49 of them.
9+90=99 (90 is ten times as much as 9)
(15+7) +99
Their sum is 99.
99 + 9/9 = 99 + 1 = 100
Smallest 2 digit number is 10. 10 + 99 = 109
The sum of 2 and 97 is 99.
49 of them.
The sum of 36 plus 63 can be expressed as a product by first calculating the sum, which is 99. This can be factored and expressed as a product of its prime factors: (99 = 9 \times 11), or as (3^2 \times 11). Thus, the expression for the sum of 36 and 63 as a product is (9 \times 11).
33 66+33=99
One possible answer is 1 times 99.
Well, darling, the sum of the first 99 odd numbers is 9801. You see, you take the last odd number, which is 197, multiply it by the total number of odd numbers (which is 99), and divide by 2. Voila! Math magic at its finest.
The sum of the integers 1 to 99 is 4950. An easy way to figure this out is using the equation N*(N+1)/2 where N is the largest number in the set.