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4 years ago

Why do you need to change the signs in -x^2+6x+m=0 ?

Mathematics

1 answer:

Goshia [24]4 years ago

3 0

Answer:

It isn't necessary but having a positive coefficient for $x^2$ makes things like completing the square and factoring easier.

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Help please triangles and trig

Oksanka [162]

Answer:

$\sin L = \frac{3}{5}$

$\tan N = \frac{4}{3}$

$\cos L = \frac{4}{5}$

$\sin N = \frac{4}{5}$

Step-by-step explanation:

Given

The above triangle

First, we calculate the length LM using Pythagoras theorem.

$LN^2 = LM^2 + MN^2$

$10^2 = LM^2 + 6^2$

$100 = LM^2 + 36$

Collect like terms

$LM^2 = 100 - 36$

$LM^2 = 64$

Take positive square root

$LM=8$

Solving (a): Sin L

$\sin L = \frac{Opposite}{Hypotenuse}$

$\sin L = \frac{MN}{LN}$

$\sin L = \frac{6}{10}$

Simplify

$\sin L = \frac{3}{5}$

Solving (b): tan N

$\tan N = \frac{Opposite}{Adjacent}$

$\tan N = \frac{LM}{MN}$

$\tan N = \frac{8}{6}$

Simplify

$\tan N = \frac{4}{3}$

Solving (c): cos L

This calculated as:

$\cos L = \frac{Adjacent}{Hypotenuse}$

$\cos L = \frac{LM}{LN}$

$\cos L = \frac{8}{10}$

Simplify

$\cos L = \frac{4}{5}$

Solving (d): sin N

This is calculated using:

If $a + b = 90$

Then: $\sin a = \cos b$

So:

$\sin N = \cos L$

$\sin N = \frac{4}{5}$

8 0

3 years ago

What is the value of the trig ratio cos x ? Help ASAP

GalinKa [24]

Answer:

14/50 or 7/25

Step-by-step explanation:

cos x = adj/hyp

adj = 14

hyp = 50

---------

you ca learn more about trig

sin x = opp/hyp

tan x = opp/adj

6 0

4 years ago

A restaurant owner wants to give new wait staff a sense for how much money they can

Mama L [17]

$23.1 i think is the answer not sure

5 0

3 years ago

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What is 2/10×4 1/3?<br> I need this answer pls

yarga [219]

Answer:

26/30, or 13/15

Step-by-step explanation:

4 1/3=13/3

2/10(13/3)

26/30

6 0

3 years ago

8 more than a number x

alexandr1967 [171]

X+8 because ur adding 8 to a number (x)

7 0

4 years ago

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