In 2 hours,hope this helps :)
this one would also be the third option
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Answer: 2x³ - 3x² + 7x + 8</h2>
Step-by-step explanation:
Sum = 4x³ - 3x² + 3x + 8 + (6x³ - 7x² + 4x) + (-8x³ + 7x²) <em>[write the terms as given by the quetion and group like terms]</em>
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⇒ Sum = (4x³ + 6x³ - 8x³) + (- 3x² - 7x² + 7x²) + ( 3x + 4x) + 8 <em> [complete the addition of like terms]</em>
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∴ sum = 2x³ - 3x² + 7x + 8
Answer:
(6, 9)
Step-by-step explanation:
Plug in 2/3x + 5 as y into 7x - 3y = 15
7x - 3(2/3x + 5) = 15
7x - 2x - 15 = 15
Add like terms:
5x - 15 = 15
5x = 30
x = 6
Then, plug in 6 as x into y = 2/3x + 5 to solve for y:
y = 2/3x + 5
y = 2/3(6) + 5
y = 9
So, the solution to the system of equations is (6, 9)
Distance = speed * time
distance = 58 * 6
distance = 348 km <==