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3 years ago

How do i turn this to decimals? 818/1320 1742/2540 396/1220

Mathematics

2 answers:

Nadusha1986 [10]3 years ago

8 0

Just divide the numbers

trapecia [35]3 years ago

6 0

You simply divide numerator by denominator
818/1320 = 0.619
1742/2540 = 0.685
396/1220 = 0.32
hope this helps ;3

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Which of the following is not equal to sin⁡(-230°)?

xenn [34]

From trigonometry we know that:

if $sin(\theta)=sin(\alpha)$

then, $\theta=n\pi+(-1)^n\alpha$ (where $n$ is an integer)

This can be rewritten in degrees as:

$\theta=n(180^{\circ})+(-1)^n\alpha$ .............(Equation 1)

Now, in our case, $\alpha=-230^{\circ}$

Therefore, (Equation 1) can be written as:

$\theta=n(180^{\circ})+(-1)^n(-230^{\circ})$ ..........(Equation 2)

Now, to find the correct options all that we have to do is replace n by relevant integers and find the values of $\theta$ that match.

For n=2, (Equation 2) gives us: $\theta=2\times 180^{\circ}+(-1)^2(-230^{\circ})=360^{\circ}-230^{\circ}=130^{\circ}$ .

Thus, $sin(230^{\circ})=sin(130^{\circ})$

Now, we know that: $-sin(-50^{\circ})=sin(50^{\circ})$

Let n=-1, then:

$\theta=(-1)\times 180^{\circ}+(-1)^{-1}(-230^{\circ})=-180^{\circ}+230^{\circ}=50^{\circ}$

Thus, $sin(-230^{\circ})=-sin(-50^{\circ})$

Likewise, $sin(-230^{\circ})=sin(50^{\circ})$

Only the last option $sin(-50^{\circ})$ will never match $sin(-230^{\circ})$ because no integral value of $n$ will ever give $\theta=-50^{\circ}$

Thus the last option is the correct option.

3 0

3 years ago

Read 2 more answers

7260÷91= please show the work

Degger [83]

7260÷91

91 goes into 726 7 times

with 890 left 91 goes into it 9 time with the remainder of 71

the answer is 79 r 71

6 0

3 years ago

Um soo they make me do dis but pls help? 14 points

Agata [3.3K]

Answer:

3 more than

Step-by-step explanation:

Hope this correct and Your welcome

7 0

3 years ago

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Select all statements thats show the correct reasoning for finding 15 divided by 2/9

Anton [14]

No there is nothing here please provide answers

6 0

3 years ago

(High points) please solve both with explanation. I’ll give brainliest.

lawyer [7]

Answer:

$36\frac{9}{16}$

area: 136 cm

perimeter: 48 cm

Step-by-step explanation:

For the first one just subtract

$45\frac{1}{2}=\frac{91}{2}=\frac{364}{8}\\8\frac{7}{8}=\frac{71}{8}\\\frac{364}{8}-\frac{71}{8}=\frac{293}{8}\\\frac{293}{8}=\frac{586}{16}\\\\\frac{586}{16}-\frac{1}{16}=\frac{585}{16}=36\frac{9}{16}$

for the second one you just have to break it into smaller, more digestible pieces (work below)

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3 years ago