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3 years ago

Can someone help me do this question?

Mathematics

2 answers:

olasank [31]3 years ago

7 0

3(-2x-1)=2(x+5)

-6x-3=2x+10

-8x=13

x=-13/8

Sonbull [250]3 years ago

7 0

X=5 I kind of did this by trail and error but here’s my working outs
5-4=1
3/1=3
5-2=3

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beks73 [17]

Answer:

The Value of $a=\frac{15}{4}$ .

Step-by-step explanation:

We have Named the figure please find the attachment for your reference.

Given:

PR = y

QR = a

RS = b

PS = z

PQ = x

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∠P = 90°

∠R = 90°

∠Q = 60°

∠S = 30°

We need to find the Value of 'a'.

Solution:

Now we know that:

In Δ PQS

∠P = 90°

∠S = 30°

Now we know that;

$sin\ \theta = \frac{opposite\ side}{Hypotenuse}$

$sin \ S= \frac{PQ}{QS}$

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Now In Triangle PQR.

∠R = 90°

∠Q = 60°

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$cos 60\°= \frac{a}{x}$

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$cos 60\°= \frac12$

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$\frac{1}{2}=\frac{a}{\frac{15}{2}}$

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$a= \frac{1}{2}\times\frac{15}{2}\\\\a=\frac{15}{4}$

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