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Mathematics

2 answers:

Morgarella [4.7K]3 years ago

5 0

Answer:

Step-by-step explanation:

Turn them into decimals 32.5 - 24.75 for easier subtraction

Ulleksa [173]3 years ago

3 0

My best guess would be b because 1/2 is equal to 2/4 and since you get a negative when subtracting from 3/4, you have to take away a whole number from the fraction. 32-24=8. 8-1=7 and then you add 4/4 to 2/4 in which you get 6/4. 6/4 - 3/4 = 3/4, meaning the answer would be 7 3/4 which is b. i hope it’s correct :)

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5 0

2 years ago

Solve the equation: k^2+5k+13=0

mr_godi [17]

Step-by-step explanation:

k² + 5k + 13 = 0

Using the quadratic formula which is

$x = \frac{ - b \pm \sqrt{ {b}^{2} - 4ac } }{2a} \\$

From the question

a = 1 , b = 5 , c = 13

So we have

$k = \frac{ - 5 \pm \sqrt{ {5}^{2} - 4(1)(13) } }{2(1)} \\ = \frac{ - 5 \pm \sqrt{25 - 52} }{2} \\ = \frac{ - 5 \pm \sqrt{ - 27} }{2} \: \: \: \: \: \: \\ = \frac{ - 5 \pm3 \sqrt{3} \: i}{2} \: \: \: \: \: \:$