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3 years ago

Work out the area of the triangle :) Show working out plz:)

Mathematics

1 answer:

Snowcat [4.5K]3 years ago

7 0

The formula for triangle area is b•h/ 1/2. so you would do 12•5=60. then divide that by 2 to get 30

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In the diagram, the length of segment VS is 39 units.

s2008m [1.1K]

It is given that the segment TR is equal to the segment VR, so segment VS is also equal to segment TS
VS = TS
39 = 6x – 3
39 + 3 = 6x
42 = 6x
X = 7

TV = 2(VR)
TV = 2 ( 2(7) + 5)
<span>TV = 38 units</span>

8 0

3 years ago

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URGENT! I need this answered today!

Grace [21]

Answer:

Volume : 420/2=210

Step-by-step explanation:

Volume Formula : Base x height x width

for a triangle 1/2 x 6 x 7 x10 =210

5 0

2 years ago

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Help please I’m tired

xxTIMURxx [149]

15.25-7.14=8.11

3.4x2.1=7.14

5 0

2 years ago

Please please help!!

shepuryov [24]

Answer:

$\large\boxed{x=0\ and\ x=\pi}$

Step-by-step explanation:

$\tan^2x\sec^2x+2\sec^2x-\tan^2x=2\\\\\text{Use}\ \tan x=\dfrac{\sin x}{\cos x},\ \sec x=\dfrac{1}{\cos x}:\\\\\left(\dfrac{\sin x}{\cos x}\right)^2\left(\dfrac{1}{\cos x}\right)^2+2\left(\dfrac{1}{\cos x}\right)^2-\left(\dfrac{\sin x}{\cos x}\right)^2=2\\\\\left(\dfrac{\sin^2x}{\cos^2x}\right)\left(\dfrac{1}{\cos^2x}\right)+\dfrac{2}{\cos^2x}-\dfrac{\sin^2x}{\cos^2x}=2$

$\dfrac{\sin^2x}{(\cos^2x)^2}+\dfrac{2-\sin^2x}{\cos^2x}=2\\\\\text{Use}\ \sin^2x+\cos^2x=1\to\sin^2x=1-\cos^2x\\\\\dfrac{1-\cos^2x}{(\cos^2x)^2}+\dfrac{2-(1-\cos^2x)}{\cos^2x}=2\\\\\dfrac{1-\cos^2x}{(\cos^2x)^2}+\dfrac{2-1+\cos^2x}{\cos^2x}=2\\\\\dfrac{1-\cos^2x}{(\cos^2x)^2}+\dfrac{1+\cos^2x}{\cos^2x}=2$

$\dfrac{1-\cos^2x}{(\cos^2x)^2}+\dfrac{(1+\cos^2x)(\cos^2x)}{(\cos^2x)^2}=2\qquad\text{Use the distributive property}\\\\\dfrac{1-\cos^2x+\cos^2x+\cos^4x}{\cos^4x}=2\\\\\dfrac{1+\cos^4x}{\cos^4x}=2\qquad\text{multiply both sides by}\ \cos^4x\neq0\\\\1+\cos^4x=2\cos^4x\qquad\text{subtract}\ \cos^4x\ \text{from both sides}\\\\1=\cos^4x\iff \cos x=\pm\sqrt1\to\cos x=\pm1\\\\ x=k\pi\ for\ k\in\mathbb{Z}\\\\\text{On the interval}\ 0\leq x$

4 0

2 years ago

On a string of lights for every 6 green lights,there are 4 white lights.If their are 30 green lights,how many white lights are t

kifflom [539]

30÷5=6

4×5=20

for every 30 green lights there are 20 white lights

3 0

3 years ago

Read 2 more answers