Sari's claim is incorrect because dividing 120.78 by 9.9 equals approximately 12.2, and since 12 is less than 12.2, her estimate is not actually greater than the true result.
Answer:

Step-by-step explanation:
Hello!
To find the total length when it is 18 feet 3 inches, we must add both lengths:
18ft 3in + 18ft 3in = 36ft 6in
For the width, add: 10ft 8in + 10ft 8in = 20ft 16in, which converts to 21ft 4in
Therefore, l + w = 57ft 10in
I hope this is helpful:)
Answer:
-1.7x -3
Step-by-step explanation:
−4.2x+3 +2.5x−6
I prefer to align them one above the other.
−4.2x+3
2.5x−6
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-1.7x -3
Answer:
128
Step-by-step explanation:
Imagine you have two jars and seven marbles.
The result is
.
That totals 128
An equivalent decimal represents the same quantity as another decimal; here, the 0 does not contribute any value.