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3 years ago

Sin(-150°) = -sin30° True or false

1 answer:

6 0

True.
30 is in the first quadrant. sin30 is a positive number, -sin30 is a negative number.
-150 is in the third quadrant, sin-150 is negative

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Simplificar y sumar 12 + 7 + 10 = ---- ---- ---

emmainna [20.7K]

Answer:

12 + 7 = 19

19 + 10 = 29

answear = 29

7 0

3 years ago

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Write equivalent expression for 7× + 4× + 3-1

Mazyrski [523]

Answer: you just flip it. It would be the opposite.

Step-by-step explanation:

When you flip it, what’s the difference? It’s still the same.

6 0

3 years ago

Someone please help me

allsm [11]

Answer:

Solutions: $x = \frac{-3}{ 4} + i \sqrt{39}$ , $x = \frac{-3}{4} - i \sqrt{39}$

Step-by-step explanation:

Given the quadratic equation, 2x² + 3x + 6 = 0, where a =2, b = 3, and c = 6:

Use the quadratic equation and substitute the values for a, b, and c to solve for the solutions:

$x = \frac{-b +/- \sqrt{b^{2} - 4ac} }{2a}$

$x = \frac{-3 +/- \sqrt{3^{2} - 4(2)(6)} }{2(2)}$

$x = \frac{-3 +/- \sqrt{9- 48} }{4}$

$x = \frac{-3 +/- \sqrt{-39} }{4}$

$x = \frac{-3 + i \sqrt{39} }{4}$ , $x = \frac{-3 - i \sqrt{39} }{4}$

Therefore, the solutions to the given quadratic equation are:

$x = -\frac{3}{ 4} + i \sqrt{39}$ , $x = -\frac{3}{4} - i \sqrt{39}$

4 0

2 years ago

How many cm3 is in 1 liter? i just wondering...

natali 33 [55]

Hello,

1 liter of water in normal conditions has a volume of 1dm^3=(1dm)^3=(10 cm)^3=10^3 cm^3=1000 cm^3

4 0

3 years ago

How do you solve for: 6 + 4/5b = 9/10b?

Gala2k [10]

Answer:

b=60

Step-by-step explanation:

6+4/5b=9/10b

-4/5b -4/5b

6=1/10b

divide both sides by 1/10

b=60

5 0

3 years ago

Read 2 more answers