If gcd(a, b)=1 then prove that gcd(ac, b)=gcd(c, b)

perhaps start by writing d=gcd(ac,b) and e=gcd(b,c) and then show that d|e and e|d

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .

7.25

step-by-step explanation:

we know that 7 equals to 7.0. we also know that 1/4=0.25. so we can add the two together and we get 7.25