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3 years ago

What is 4x-(9-3x)=8x-1

Mathematics

1 answer:

zmey [24]3 years ago

7 0

X=-8
Hope this helped
Tell me if you need an explanation

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What is the length of the unknown leg of the right triangle?

Keith_Richards [23]

Answer:

x = 5.744 (3dp)

Step-by-step explanation:

Pythagorus' Theorum

7^2 - 4^2 =

49 - 16 = 33

x = sqrt of 33

x = 5.744 (3dp)

If you need further assistance, feel free to ask!

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2 years ago

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Every day, about 140,000,000 plastic water bottles are bought in the United States. Each bottle is about 0.250 meters long, and

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2 years ago

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2 years ago

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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

QS = 15

∠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;

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

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

Substituting the given values we get;

$sin\ 30\°=\frac{x}{15}$

Now we know that;

$sin\ 30\° = \frac12$

So we can say that;

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

Now In Triangle PQR.

∠R = 90°

∠Q = 60°

So we can say that;

$Cos \theta = \frac{adjacent \ Side}{Hypotenuse}\\$

$Cos\ Q = \frac{QR}{PQ}$

Substituting the given values we get;

$cos 60\°= \frac{a}{x}$

Now we know that;

$cos 60\°= \frac12$

$x=\frac{15}{2}$

So substituting the values we get;

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

By Using Cross Multiplication we get;

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

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

6 0

2 years ago