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Ksju [112]
3 years ago
11

Can someone please solve this using quadratic formula 2x^2 -7x -15=0

Mathematics
1 answer:
saw5 [17]3 years ago
7 0

Step-by-step explanation:

a=2

b=-7

c=-15

-(-7)+-sq root (-7)²-4(2)(-15) / 2(2)

7 +- sq root 169 / 4

7+- 13 / 4

7+13 / 4, 7-13 / 4

x=5 x=-3/2

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What is 9 - (-8) = 20 and how did you get that answer?
Colt1911 [192]

Answer: No solution

Step-by-step explanation:

9-(-8)=20             given

9+8=20                the two negatives cancel out, making the eight positive

17=20                   this statement is not correct, so the answer is no solution

no solution

I'm not sure if there was supposed to be a variable in there somewhere, but I did my best to explain. Hope this helps!

4 0
3 years ago
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A regular hexagon is dilated by a scale factor of 75 to create a new hexagon. How does the perimeter of the new hexagon compare
mezya [45]
Let the length of the original hexagon be x:
the perimeter of the hexagon will be:
P=length*number of sides
P=6*x=6x
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length=scale factor × original length
=75 × x
=75x
thus the new perimeter will be:
6×75x
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hence the new perimeter compared to the old one will be:
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3 0
3 years ago
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3 years ago
Two triangles have altitudes of equal length. if the areas of these triangles have a ratio of 3:4 then the bases of the triangle
MatroZZZ [7]
Answer:
3/4
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Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
Below are the choices:

a.0.0142 
<span>b.1.0142 </span>
<span>c.14.2 </span>
<span>d.1.42
</span>
Every month your balance includes the original amount (100%) and the added the monthly interest (1.42%). So each month the balance will be 101.42% of the prior month's balance. Move the decimal point two places to the left to make that into a decimal. 

<span>Answer: </span>
<span>b. 1.0142</span>

6 0
2 years ago
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