Answer:
7
Step-by-step explanation:
3x – 4(x - 4) + 4 = 13
=> 3x - 4x + 16 + 4 = 13
=> - x + 20 = 13
=> - x = 13 - 20
=> - x = - 7
=> x = 7
Answer:

Step-by-step explanation:
Given rational expression is,

x - 2) 2x² + 5x - 14(2x + 9
<u>2x² - 4x</u>
9x - 14
<u>9x - 18</u>
4
Therefore,
is the answer.
Answer:
A
Step-by-step explanation:
Answer:
- 494
Step-by-step explanation:
Breaking down the summation into it;s component parts
= 4k -
k(k + 1) ← substitute k = 19
= (4 × 19 ) - 1.5 × (19 × 20)
= 76 - (1.5 × 380)
= 76 - 570
= 494