Answer:
73
Step-by-step explanation:
2×2×7×2=56
2+2=4
56+4+13=73
Step-by-step explanation:
26/7 ×35/ 8 =910/56
=16 1 /4
61/9 × 23 /4 =1403 / 36
=38 35/36
Answer:
length = (x − 8) units and width = (x − 9) units
Step-by-step explanation:
We need to factor
x^2 - 17x + 72
We need two numbers whose product is 72 and whose sum is -17.
The numbers are -8 and -9.
x^2 - 17x + 72 = (x - 8)(x - 9)
Answer: length = (x − 8) units and width = (x − 9) units
Everyone works differently in mental math.
Using the property of commutativity, we can (mentally) rearrange to calculate 89+11 + 27
Since 89+11 is exactly 100, the sum is therefore 100+27=127.
