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3 years ago

Plz help due tomorrow

Mathematics

2 answers:

Juli2301 [7.4K]3 years ago

6 0

Answer:

11.2 - 10y

Step-by-step explanation:

= 4-3y +(-7y) + 7.2

= 4 -3y -7y +7.2

= 4 -10y +7.2

= 4 +7.2 - 10y

= 11.2 - 10y

luda_lava [24]3 years ago

4 0

Answer:

4-3y+(-7y)+7.2

4-3y+-7y+7.2

11.2-3y-7y

11.2=10yu

Step-by-step explanation:

hope you like my answer

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Step-by-step explanation:

Difference = 7 - 4 = 3 terms; 8.75 - (-70) = 78.75

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3 years ago

Read 2 more answers

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

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