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2 years ago

Please solve for n the following equation..............-2 = -n + 8

Mathematics

1 answer:

Zielflug [23.3K]2 years ago

4 0

Answer:

n=-5

Step-by-step explanation:

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Which of the following is always true about lines of symmetry?

madam [21]

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2 years ago

Prove :<br>sin²θ + cos²θ = 1<br><br><br>thankyou ~

Gnom [1K]

Answer:

See below

Step-by-step explanation:

Here we need to prove that ,

$\sf\longrightarrow sin^2\theta + cos^2\theta = 1$

Imagine a right angled triangle with one of its acute angle as $\theta$ .

The side opposite to this angle will be perpendicular .
Also we know that ,

$\sf\longrightarrow sin\theta =\dfrac{p}{h} \\$

$\sf\longrightarrow cos\theta =\dfrac{b}{h}$

And by Pythagoras theorem ,

$\sf\longrightarrow h^2 = p^2+b^2 \dots (i)$

Where the symbols have their usual meaning.

Now , taking LHS ,

$\sf\longrightarrow sin^2\theta +cos^2\theta$

Substituting the respective values,

$\sf\longrightarrow \bigg(\dfrac{p}{h}\bigg)^2+\bigg(\dfrac{b}{h}\bigg)^2\\$

$\sf\longrightarrow \dfrac{p^2}{h^2}+\dfrac{b^2}{h^2}\\$

$\sf\longrightarrow \dfrac{p^2+b^2}{h^2}$

From equation (i) ,

$\sf\longrightarrow\cancel{ \dfrac{h^2}{h^2}}\\$

$\sf\longrightarrow \bf 1 = RHS$

Since LHS = RHS ,

Hence Proved !

I hope this helps.

5 0

1 year ago

What is the slope of a line perpendicular to the line of y=-1/4x-1

harina [27]

Answer: 4

The given line has a slope of -1/4 as this is the number in front of the x. The general equation y = mx+b has m as the slope. So m = -1/4 is given

Flip the sign to get -1/4 turn into +1/4 or just 1/4

Then flip the fraction (aka reciprocal) to go from 1/4 to 4/1 and that simplifies to 4.

Multiplying the original slope (-1/4) and the perpendicular slope (4) will result in -1.

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3 years ago

This is really important i have to get this one tomorrow please help me

Murrr4er [49]

I can’t see your pics

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3 years ago

If QRST below is a rectangle, what is the measure of angle T + angle R?

GenaCL600 [577]

I can't see QRST and I'm wondering how far below it's located.

But I do know that ALL of the angles in EVERY rectangle are
right angles ... 90° each.

So if QRST is really a rectangle, then any two of its angles
add up to (2 · 90°) = 180° .

7 0

2 years ago