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3 years ago

Evaluate b^2 - 4ac = -1, b = -5, and c =2. show steps pls!!

Mathematics

2 answers:

Alex Ar [27]3 years ago

6 0

B² - 4ac =
(-5)² - 4*(-1)*(2) =
25 + 8 =
33 ← answer

Alona [7]3 years ago

4 0

B^2 - 4ac =

b=-5
a=-1
c=2

So then it equals =
(-5)^2 - 4(-1)(2)

-5^2 = Equals 25

the power of 2 is multiplying the same number it's powering. Two negatives = a positive. so 5x5 = 25.

4 x -1 x 2 = -8

4 x -1 = -4 and -4 x 2 = -8.

25 - (-8) = 33

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Answer:

2 29/36

Step-by-step explanation:

So circle the two signs., so the problem is now this:

1/4+4/3+1 2/9

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It is 36. Then, you re-write the new answers

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3 years ago

What is the area of FGH

Dmitrij [34]

54 $in^{2}$

A right triangle is a shape that looks like half of a square. The height of the triangle is 12, and the base of the triangle is 9. To find the area, use the following formula:

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3 years ago

Which is the best estimate to the nearest one percent of startfraction 7 over 15 endfraction?

ipn [44]

The best estimate to the nearest one percent of the fraction; 7/15 is; 47%.

<h3>What is the best estimate of the fraction to the nearest percent?</h3>

From the task content, it follows that the fraction given whose estimate is to be determined is; 7/15.

The fraction expressed as a percentage is;

(7/15) × 100 %

= 46.667%.

Hence, when rounded to the nearest one percent; = 47%.

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1 year ago

POSSIBLE POINTS: 5.88

Bess [88]

The function of the length z in meters of the side parallel to the wall is A(z) = z/2(210 - z)

<h3>How to write a function of the length z in meters of the side parallel to the wall?</h3>

The given parameters are:

Perimeter = 210 meters

Let the length parallel to the wall be represented as z and the width be x

So, the perimeter of the fence is

P = 2x + z

This gives

210 = 2x + z

Make x the subject

x = 1/2(210 - z)

The area of the wall is calculated as

A = xz

So, we have

A = 1/2(210 - z) * z

This gives

A = z/2(210 - z)

Rewrite as

A(z) = z/2(210 - z)

Hence, the function of the length z in meters of the side parallel to the wall is A(z) = z/2(210 - z)