They all are, but if you are looking for bigger than a binomial, than I believe that D) 7 x 7 - 2x - 4 + 3 is the best option
The first week is 10 x 1.4.
The second week is that answer x 1.4 etc.
So you are only multiplying the first week by 10.
{ [ 10 x 1.4) x 1.4] x 1.4}. Since multiplication is commutative, we don’t need the grouping symbols...
10 x 1.4 x 1.4 x 1.4
That s answer A
X is usually the representation for the unknown number.
Keep the "13" and focus on the "0.67."
Depending upon the degree of accuracy you want, you could convert "0.67" into 67/100, or 0.666666666666666... = 6/9 or 2/3. You'll then end up with 13 67/100 or 13 2/3.
Answer:
28 minutes
Step-by-step explanation:
1/8 school in 3 1/2 minutes
To feed the entire school multiply by 8
3 1/2 * 8
Change the mixed number into an improper fraction
3 1/2 = (2*3+1)/2 = 7/2
7/2 *8 = 56/2
28
28 minutes