Step-by-step explanation:
Say you have these 2 fractions

Cross multiply as following;

If in the end, both numerator and denominator are equal, then the fractions are equivalent.
Examples:
Example 1

Cross multiply

They're equivalent.
Example 2

Cross multiply

They're not equivalent.
Answer:
C. $2.50
Step-by-step explanation:
x=1 y=5.5
x=2 y=2.5
Answer:
a. Yes
b. Yes
c. Yes
d. No
Step-by-step explanation:
a. Because -10x+4x=6x
b. 2(12-3x)=2*12-2*3x=24-6x
c. 24 and -6x just switched places.
d. 24x-6x=18x not 24-6x
Answer:
x=1 ( i think)
Step-by-step explanation:
C(n,r) =n!/(r!(n-r)!)
c(n,r)= c (40,16)
= 40!/(16!(40-16)!)
=6.2852101650+10
=62852101650