Question

Simplify: 7x²(3x – 9) + 3 and find its values for x=4 and x=6.

Please explain it Step by Step.​

Answer 1

Answer:

Let his salary be x and his fixed increment be y.

After 4 years of service → x + 4y = 1500 → (1)

After 10 years of service → x + 10y = 1800 → (2)

Subtracting, - 6y = - 300

Thus, y = \frac{-300}{-6}−6−300 =50

Putting y = 50 in x + 4y = 1500

We get, x = 1500 - (4 \times 50)1500−(4×50) = 1500 - 200 = 1300

Hence, his starting salary = Rs.1300

Fixed Increment = Rs.50

Step-by-step explanation:

sorry I am spamming

Answer 2

Step-by-step explanation:

hope you like the answer