i read in class 4 but I don't explain the answer
7x-1+5x-23= 180
12x-24=180
12x=204
X=17
Answer:
d
Step-by-step explanation:
hope this helps!
please mark me brainliest!
Answer:
he can only use 3gbs of data
Step-by-step explanation:
Claim: The difference between two rational numbers always is a rational number
Proof: You have a/b - c/d with a,b,c,d being integers and b,d not equal to 0.
Then:
a/b - c/d ----> ad/bd - bc/bd -----> (ad - bc)/bd
Since ad, bc, and bd are integers since integers are closed under the operation of multiplication and ad-bc is an integer since integers are closed under the operation of subtraction, then (ad-bc)/bd is a rational number since it is in the form of 1 integer divided by another and the denominator is not eqaul to 0 since b and d were not equal to 0. Thus a/b - c/d is a rational number.
