1/2 * 1 * (1 + 1) = 1
1/2 * 2 * (2 + 1) = 3
1/2 * 3 * (3 + 1) = 6
1/2 * 4 * (4 + 1) = 10
Best answer me please!
there are some typos so I think that you need to multiply 7 by 2 because it said two-weeks 7 days in a week.so then it equals 14. multiply 14 by 37 you can get 518 days probably.
The 2+3=45 confuses me but the answer is 126 for 9+4. the reason for this is because (9*9)+(9*4)=126.
Step-by-step explanation:
1. 'x' is the total no. of students and 'y' is no. of 6th graders.
1/3 of the total students are 6th graders.
So the equation will be
1/3 × x = y
x/3 = y
2. If x = 90
y = 90/3
y = 30
3. If x = 27,
y = 27/3
y = 9
4. If y = 42
x/3 = 42
x = 42 x 3
x = 126