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2 years ago

Knowing that sin(60)=0.866, what is cos(30)

Mathematics

1 answer:

tatuchka [14]2 years ago

6 0

Answer:

knowing that sin(60)=0.866, what is cos(30)

Step-by-step explanation:

Cos 30 = 8.66

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Solve for x.<br> x-2/4 - x+3/3 = -2

exis [7]

The LCD is 12. Thus, your

(x-2)/4 - (x+3)/3 = -2 becomes 12((x-2)/4 - (x+3)/3 = -2), or

3(x-2) - 4(x+3) = -36

Then 3x - 6 - 4x - 12 = -36. Combining like terms,

-x = -36 + 18, or -x = -18, or x = 18.

Check this result by subbing 18 for x in the given equation.

Please note: You must use parentheses here as indicated to eliminate any ambiguity about order of operations and what divides into what.

7 0

3 years ago

Please help me out!!!!!!!!

qaws [65]

Answer:

x = - 6

Step-by-step explanation:

Given that y varies directly as x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = - 9 when x = 3, thus

k = $\frac{y}{x}$ = $\frac{-9}{3}$ = - 3

y = - 3x ← equation of variation

When y = 18, then

18 = - 3x ( divide both sides by - 3 )

x = - 6

5 0

3 years ago

Which value satisfies the inequality 5x + 7 ≤ 8x - 3 + 2x?

QveST [7]

Answer:

D) 2

Step-by-step explanation:

5x + 7 $\leq$ 8x -3 +2x

5x + 7 $\leq$ 10x - 3

7 + 3 $\leq$ 10x - 5x

10 $\leq$ 5x

2 $\leq$ x

x $\geq$ 2

8 0

2 years ago

i When 20 is added to a certain number and the sun is divided by 3, the result is 3 times the number, find the number.

Bingel [31]

Answer:

$let \: the \: number \: be \: x \\ \frac{20 + x}{3} = 3x \\ \frac{3(20 + x)}{3} = (3x)3 \\ 20 + x = 9x \\ 20 = 9x - x \\ 20 = 8x \\ \frac{20}{8} = \frac{8x}{8} \\ x = 2.5$

Step-by-step explanation:

Hope that this is helpful .

Have a great day.

3 0

3 years ago

The left and right page numbers of an open book are two consecutive integers whose sum is 321

PIT_PIT [208]

Answer:

160,160

Step-by-step explanation:

let the first page be X

second one be x+1

x+x+1=321

2x=320

x= 320÷2=160

pages 160 161

6 0

3 years ago