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nasty-shy [4]
3 years ago
8

As student received a 75% on an exam. If there were 20 questions on the exam which ratio would show the number of questions answ

ered correctly
Mathematics
2 answers:
sergejj [24]3 years ago
7 0
75% times 20=15 so he got 15 correct 
Luda [366]3 years ago
7 0
The answer is 15:20 i believe
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Knowing that 2i is one answer to the equation x^4 - 2x^3 + 6x^2 - 8x + m = 0, find the 'm' and the other possible answers.
kakasveta [241]
Ok so remember
if a+bi is a root, then a-bi is also a root

since 2i is a root, -2i is also a root
use synthetic division and the fact that when we divide by 2i and -2i, we have to get all real coeficients and end witha zero at the end
I will show the division in the attachment

we find m=8


we then find th resulting equation that is x^2-2x+2=0
quadratic formula
x=\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}
x=1+i or 1-i







m=8 and the other roots are
x=-2i, 1+i, 1-i


4 0
3 years ago
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djyliett [7]

Answer:

<em><u>note:</u></em>

<em><u>solution is attached</u></em>

6 0
3 years ago
A bag contains 10 blue, 6 green, and 4 red marbles. You choose one marble. Without putting it back, you choose a second marble.
Gelneren [198K]
P green and blue 3/20
5 0
3 years ago
If Shane and Susan both push on a box with a force of 25N, but in opposite directions, what will happen to the box?
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3 0
3 years ago
Read 2 more answers
Two different lines lie in the same plane.
nikitadnepr [17]

Answer:

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8 0
2 years ago
Read 2 more answers
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