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3 years ago

What is the sum? seven-fourths plus negative one-fifth

Mathematics

2 answers:

tangare [24]3 years ago

8 0

Typing it into a calculater using the abc key to make a fraction, it comes out as 1 and 19/20

jok3333 [9.3K]3 years ago

6 0

The answer is 1.55. Did you try finding a common denominator?

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olga_2 [115]

1km is 1000 m
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3 years ago

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How many lines of symmetry does a regular polygon with 16 sides have? A. 2 B. 8 C. 32 D. 16

denpristay [2]

Answer:

C. 32

Step-by-step explanation:

There are 16 lines of symmetry passing through the vertex's and another 16 passing through the mid points of the sides

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3 years ago

Can someone please help me??

Nesterboy [21]

Answer:

Answers are below

Step-by-step explanation:

x y

0 $25,001.00

1 $25,000.95

2 $25,000.90

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3 years ago

Given that the quadratic equation has equal roots (k^2-1)x^2-2kx-3k-1=0

Alik [6]

Answer:

(See explanation for further details)

Step-by-step explanation:

The real expression is:

$(k^{2}-1)\cdot x{{2} - 2\cdot k \cdot x - 3\cdot k + 1 = 0$

The general equation for the second-order polynomial is:

$x = \frac{2\cdot k \pm \sqrt{4\cdot k^{2}-4\cdot (k^{2}-1)\cdot (-3\cdot k + 1)}}{k^{2}-1}$

This condition must be observed for the case of a quadratic equation with equal roots:

$4\cdot k^{2} - 4\cdot (k^{2}-1)\cdot (-3\cdot k + 1) = 0$

$k^{2} + (k^{2}-1)\cdot (3\cdot k + 1) = 0$

$k^{2} + 3\cdot k^{3} - 3\cdot k - k^{2}-1 = 0$

$3\cdot k^{3} - 3\cdot k - 1 = 0$

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4 years ago

I need really big help now

Romashka [77]

Answer:

its 375

Step-by-step explanation:

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3 years ago

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