Answer:
Step-by-step explanation:
Perimeter is twice the sum of the length and width
P=2(L+W), in this case
P=2(4x+6+3x+4)
P=2(7x+10)
P=14x+20
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1) Multiply out the 2 to the 10, so it will become 3x-5=20 2) Then solve:3x=25 3)x=25/3
Initial salary = $50,000 .
Rate of raise = 5% each year.
Therefore, each next year salary would be 105% that is 1.05 times.
5% of 50,000 = 0.05 × 50000 = 2500.
Therefore raise is $2500 each year.
According to geometric sequence first term 50000 and common ratio 1.05.
Applying geometric sequence formula

1) 
2) In order to find salary in 5 years we need to plug n=5, we get

= 50000(1.21550625)
<h3>=$60775.3125.</h3>
3) In order to find the total salary in 10 years we need to apply sum of 10 terms formula of a geometric sequence.

Plugging n=10, a = 50000 and r= 1.05.


= 628894.62678.
<h3>Therefore , you will have earned $ 628894.62678 in total salary by the end of your 10th year.</h3>
4xa +8 =4a+8
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