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2 years ago

Find the value of x. X=____

Mathematics

1 answer:

musickatia [10]2 years ago

4 0

(3x+1)+(2x+4)=90
3x+1+2x+4=90
5x+5=90
5x=85
x=17

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Write the number 3.8 in the form a/b using integers

Juliette [100K]

Answer:

3.8 = 38/10

Step-by-step explanation:

The given number = 3.8

We have to write 3.8 in fraction form a/b

Here we have 1 digit after the decimal. To get rid off the decimal number, we need to multiply both the numerator and the denominator by 10 since we have to 1 digit after the decimal.

$\frac{3.8 *10}{10}$

= 38/10

Therefore, the answer is 3.8 = 38/10

Thank you.

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3 years ago

4(1-x)+2x=-3(x+1) -) 7/5 -) -7/5 -) -3/4 -) -7

natima [27]

Answer:

the last one -) -7

Step-by-step explanation:

if this help you please give me a crown please

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2 years ago

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How do I write 7 23/40 as a decimal

Vsevolod [243]

The decimal for this would be 7.575
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3 years ago

Find the angles between -pi and pi that satisfy: (−√3) sin(v)+cos(v)=√3

MAXImum [283]

Observe that

$\sin\left(\dfrac\pi6-v\right)=\sin\dfrac\pi6\cos v-\cos\dfrac\pi6\sin v=\dfrac12\cos v-\dfrac{\sqrt3}2\sin v$

In the original equation, divide both sides by $\dfrac12$ :

$-\sqrt3\sin v+\cos v=\sqrt3\implies\dfrac12\cos v-\dfrac{\sqrt3}2\sin v=\dfrac{\sqrt3}2$

$\implies\sin\left(\dfrac\pi6-v\right)=\dfrac{\sqrt3}2$

Next,

$\sin x=\dfrac{\sqrt3}2\implies x=\dfrac\pi3+2n\pi,x=\dfrac{2\pi}3+2n\pi$

where $n$ is any integer. Then

$\sin\left(\dfrac\pi6-v\right)\implies v=-\dfrac\pi6-2n\pi,v=-\dfrac\pi2-2n\pi$

Fix $n=0$ to ensure $-\pi$ , so that

$v=-\dfrac\pi6,v=-\dfrac\pi2$

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3 years ago

Fatima deposits $600 in an account that pays 3.65% annual interest compounded daily. Use the fact that there are approximately 3

seropon [69]

A=600⋅(1.0001)^365t
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3 years ago