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3 years ago

Can someone please help me . 3/5 = x/15, x = ??

2 answers:

8 0

First you want to figure out 5 times what equals 15.

3 times five equals 15. In order to make the top and bottom equal you multiply both by three and get 9/15. Meaning X equals 9.

lubasha [3.4K]3 years ago

7 0

Answer:

Step-by-step explanation:

multiply both sides by 15 to get:

45/5 = x

9 = x

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Simplify the expression (8n^4-6n+8n^2)+(6n^4-3n+7)

Marysya12 [62]

Answer:

=14n⁴+8n²-9n+7

Step-by-step explanation:

(8n⁴-6n+8n²)+(6n⁴-3n+7)

=8n⁴-6n+8n²+6n⁴-3n+7

=8n⁴+6n⁴+8n²-6n-3n+7

=14n⁴+8n²-9n+7

8 0

3 years ago

A line passes through (4,5) and (8,9). which equation best represents the line?

telo118 [61]

Y=x+1 would be the best equation that represents the line

3 0

4 years ago

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Daniel [21]

Answer:

place your dots on the grid

Step-by-step explanation:

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6 0

3 years ago

Given that Cosecant (t) = negative StartFraction 13 Over 5 EndFraction for Pi less-than t less-than StartFraction 3 pi Over 2 En

Sergio [31]

Answer:

$\bold{cot(t) =\dfrac{12}{5}}$

Step-by-step explanation:

Given that:

$Cosec (t) = -\frac{13}5$

for $\pi < t < \frac{3 \pi}2$

That means, angle $t$ is in the 3rd quadrant.

To find:

Value of cot(t)

Solution:

First of all, let us recall what trigonometric ratios are positive and what trigonometric ratios are negative in 3rd quadrant.

In 3rd quadrant, tangent and cotangent are positive.

All other trigonometric ratios are negative.

Let us have a look at the following identity:

$cosec^2\theta -cot^2\theta =1$

here, $\theta =t$

So, $cosec^2t-cot^2t=1$

$\Rightarrow (-\dfrac{13}{5})^2-cot^2t=1\\\Rightarrow (\dfrac{169}{25})-cot^2t=1\\\Rightarrow \dfrac{169}{25}-1=cot^2t\\\Rightarrow \dfrac{169-25}{25}=cot^2t\\\Rightarrow \dfrac{144}{25}=cot^2t\\\Rightarrow cot(t)=\pm\sqrt{\dfrac{144}{25}}\\\Rightarrow cot(t)=\pm\dfrac{12}{5}$

But, angle $t$ is in 3rd quadrant, so value of

$\bold{cot(t) =\dfrac{12}{5}}$

4 0

3 years ago

The sum of 4.5 and a number K is 26.2

garri49 [273]

Answer:

Your answer should be K=21.7

You can find this by subtracting 26.2-4.5

3 0

2 years ago