Answer:
Step-by-step explanation:
1 : 3 : : 4: x
Multiply 1 and x and multiply 3 and 4
x = 12
Answer: B
5% of 500 is 25, 25 x 5 is 125, 125 + 500 is 625
an = a1 + d(n−1)
an = a1 + dn - d
dn = an - a1 + d
n = (an - a1 + d) / d
n = (an - a1)/d + 1
Answer is B.
7 = x
7 - 2x = x - 14
7 + 14 = x + 2x
21 = 3x
Hope this helps!