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Murljashka [212]
3 years ago
15

8x^2+18x-5=0 find the discriminant

Mathematics
1 answer:
Shalnov [3]3 years ago
7 0
The formula for the discriminant is the square root of b^2 - 4ac

8x^2+18x-5= 0

a = 8, b=18, c= -5

Square root of 324 +160

Square root of 484 = 22                The discriminant is 22


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2 years ago
A pole 5 feet tall is used to support a guy wire for a tower, which runs from the tower to a metal stake in the ground. After pl
sammy [17]

The length of the guy's wire to the nearest foot is 89 feet.

The situation forms a right-angled triangle.

<h3>Properties of a right angle triangle:</h3>
  • A right-angle triangle has one angle of 90 degrees.
  • The sides can be found using the Pythagoras theorem.
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The hypotenuse of the triangle is the length of the wire.

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4 0
2 years ago
A toy's store percent of markup is 35%.a model train costs 100$.what is the markup
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7 0
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It is believed that 11% of all Americans are left-handed. In a random sample of 100 students from a particular college with 1012
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Answer:

Step-by-step explanation:

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Where p' = 14/100= 0.14 (no of left handed sample promotion)

q' = 1-p' = 1-0.14= 0.86

Since the requested confidence level is CL = 0.98, then α = 1 – CL = 1 – 0.98 = 0.02/2= 0.01, z (0.01) = 2.326

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Thus we estimate with 98% confidence that between 12% and 27% of all Americans are left handed.

6 0
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