Answer:
Step-by-step explanation:
4 : 2
8 : 4
12 : 6
16:8
6410 is the answer because you move the decimal place 3 times
Answer:
9.48
Step-by-step explanation:
Add:
$29.99 + $15.00 + $9.75 = $54.74
Subtract:
$54.74 - $40.00 = $14.74
Subtract:
$14.74 - 5.26 = $9.48
Answer: $9.48
I assume you mean the product of mixed numbers,
3 1/2 × 3 1/2
If we write this as
(3 + 1/2) × (3 + 1/2) = (3 + 1/2)²
we can use the identity
(a + b)² = a² + 2ab + b²
so that
3 1/2 × 3 1/2 = 3² + (2 × 3 × 1/2) + (1/2)²
3 1/2 × 3 1/2 = 9 + 3 + 1/4
3 1/2 × 3 1/2 = 12 1/4
Alternatively, we can first write 3 1/2 as a mixed number:
3 + 1/2 = 6/2 + 1/2 = (6 + 1)/2 = 7/2
Then
3 1/2 × 3 1/2 = 7/2 × 7/2 = (7 × 7) / (2 × 2) = 49/4
and
49/4 = (48 + 1)/4 = ((4 × 12) + 1)/4 = 12 + 1/4
