Two different digits from 1 to 9 are chosen. One digit is placed in each box to complete the two 2-digit numbers
shown. The result of subtracting the bottom number
from the top number is calculated. How many of the
possible results are positive?
(A) 36 (B) 32 (C) 30
(D) 34 (E) 38

Picture = 5 X
- X 5

1.677

step-by-step explanation:

i'm not good at explaining stuff but if you need an answer i'm here for you.

a negative exponent is translated as follows:

so, we have

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

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