Step-by-step explanation:
-5x + 4y = 2
+ (9x - 4y = 6)
=> 4x = 8, x = 2.
Therefore -5(2) + 4y = 2, 4y = 12, y = 3.
The solution pair is (2,3).
Answer:
12t² - 9t - 2
Step-by-step explanation:
Combine like terms. Like terms have same variable with same exponents.
(7t² - 6t-4) + (5t² - 3t+2) = 7t² - 6t-4 + 5t² - 3t+2
= <u>7t² + 5t²</u> <u>- 6t - 3t </u> <u>- 4 + 2</u>
= 12t² - 9t - 2
300,000 + 4,000 + 1 i believe