Answer:
Step-by-step explanation:
It would equal to 1.75
At that rate, how many miles (d) will the train travel in 9 h ?
A.
d = 99 + 9
B.
d = 99 ÷ 9
C.
d = 9 ÷ 99
D.
d = 99 • 9
4000 frequent flyer miles did David have last month.
Given that,
Together, David and Carol have a total of 35,000 frequent flyer miles with an airline.
Carol has 19,000 miles.
After going on a business trip, David has 1200 more miles than he had last month.
We have to determine,
How many frequent flyer miles did David have last month.
According to the question,
David and Carol have a total of 35,000 frequent flyer miles with an airline.
Carol has 19,000 miles.
= 35,000 - 1900 = 16,000
After going on a business trip, David has 1200 more miles than he had last month.
Then,
David havelast month frequent flyer miles is,
= 16,000 - 12,000 = 4,000
Hence, 4000 frequent flyer miles did David have last month.
To know more about Linear equations click the link given below.
If 1+8i and 1-8i are the equation's roots, then the quadratic equation is
x² - 2x + 65 = 0.
A quadratic equation is written in standard form as y = ax² + bx + c, where a, b, and c are simple numbers. A quadratic equation's factored form is denoted by the expression y = (ax + c) (bx + d), where a, b, c, and d are simple numbers.
Any quadratic problem can be solved using the quadratic formula. The equation is first changed to have the form ax² + bx + c = 0, where a, b, and c are coefficients. After that, we enter these coefficients into the following formula: (-b ± √(b² - 4ac)) / (2a).
If 1+8i and 1-8i are the equation's roots, then:
x - (1 + 8i) = 0 and x - (1 - 8i) = 0 then we get
x - 1 - 8i = 0 and x - 1 + 8i = 0
⇒ (x - 1 - 8i)(x - 1 + 8i) = 0
⇒ x² - x + 8ix - x + 1 - 8i - 8ix + 8i + 64 = 0
⇒ x² - 2x + 65 = 0
The quadratic equation is x² - 2x + 65 = 0.
To learn more about quadratic equation refer to:
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Answer:
Step-by-step explanation:
If the roots of this equation are 1+8i and 1-8i, then:
And hence:
Hope this helps!