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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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motikmotik

Answer:

x > - $\frac{12}{5}$ or x > -2.4

Step-by-step explanation:

-9x > 9 + 3(- $\frac{1}{3}$ x + 1) - 3x

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3 years ago

2x² + x + 10 = 0 dengan rumus abc

Gala2k [10]

Answer:

a = 2, b = 1 and c = 10

Step-by-step explanation:

The given equation is 2x² + x + 10 = 0 ...(1)

The general form of a quadratic equation is given by :

ax²+bx+c=0 ...(2)

We need to find the values of a,b and c in the given equation.

Comparing equation (1) and (2),

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4 years ago

The length of the tile be it is about 3 pounds 16228 inches which mark on the tape measure is the closest to tree Park 16228 inc

romanna [79]

The mark on the tape measure that is closest to 3.16228 is 3.1875

<h3>How to determine the closest measure?</h3>

The measurement is given as:

Length = 3.16228

The tape measure is marked in sixteenths of an inch i.e 1/16 or 0.0625

So, we have the following range:

0.0625, 0.125, 0.1875, 0.25,.....

Rewrite the range as follows:

3.0625, 3.125, 3.1875, 3.25,.....

The length 3.1622 is between 3.125 and 3.1875.

The difference between the measurement and the range is

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3.1875 - 3.16228 = 0.02522

0.02522 is smaller than 0.03728

Hence, the mark on the tape measure that is closest to 3.16228 is 3.1875

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<u>Complete question</u>

The length of tile B 3.16228 is about inches. Which mark on the tape measure is closest to 3.16228 inches? Remember, the tape measure is marked in sixteenths of an inch.

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2 years ago

A 22-ft ladder leans against a building so that the angle between the ground and the ladder is 64°. How high does the ladder rea

vodka [1.7K]

The height of the ladder on the building is 19.77 feet

<h3>How high does the ladder reach on the building?</h3>

Represent the height of the ladder on the building with h

So, the given parameters are:

Angle, x = 64 degrees

Length of ladder, l = 22 feet

The height of the ladder on the building is calculated using

sin(x) = h/l

Substitute the known values in the above equation

sin(64) = h/22

Multiply both sides by 22

h = 22 * sin(64)

Evaluate the product

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Hence, the height of the ladder on the building is 19.77 feet

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2 years ago

Marcy is making a hooked circle-shaped rug for her mother. The circumference of the circle-shaped rug is 75.36 inches. What is t

Nesterboy [21]

The area of the circular shaped rug would be 451.931, let me explain to you how I got this calculation.

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You probably noticed that since diameter is twice the radius, the proportion between circumference and diameter is equal to π: <span>C/D = 2πR / 2R = π is the formula for the convertion of circumfrence to diameter.
</span>
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4 years ago