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vivado [14]
3 years ago
14

What is 3 tenths + 1 hundredths as a decimal

Mathematics
2 answers:
MariettaO [177]3 years ago
6 0
.31 is the answer :)))
andreyandreev [35.5K]3 years ago
3 0
3 tenths = 0.3
1 hundredth = 0.01
0.31 is the answer
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Step-by-step explanation:

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2 years ago
Y is inversy proportional to x. When y=7 , x=9 A) work out an equation connecting y and x? B) work out the value of y when x=21
natita [175]

Answer:

see explanation

Step-by-step explanation:

since y is inversely proportional to x the equation relating them is

y = \frac{k}{x} ← k is the constant of proportionality

to find k use the given condition when y = 7, x = 9

k = yx = 7 × 9 = 63

y = \frac{63}{x} ← is the equation connecting them

when x = 21, then

y = \frac{63}{21} = 3


8 0
3 years ago
Calculate cos(480°) and sin(480°).
hram777 [196]

Answer:

\cos(480^\circ)=-\dfrac{1}{2}

\sin(480^\circ)=\dfrac{\sqrt{3}}{2}

Step-by-step explanation:

Calculate the value of trigonometry function.

\cos(480^\circ) and \sin(480^\circ)

Split the angle between 0 to 90° using trigonometry formula.

\Rightarrow \cos(360^\circ+120^\circ)  

\Rightarrow \cos(120^\circ)                \because \cos(360+\theta)=\cos\theta

\Rightarrow \cos(180^\circ-60^\circ)             \because 120=180-60

\Rightarrow -\cos(60^\circ)                       \because \cos(180-\theta)=-\cos\theta

\Rightarrow -\dfrac{1}{2}

Therefore, cos(480°) = -0.5

\Rightarrow \sin(360^\circ+120^\circ)  

\Rightarrow \sin(120^\circ)                \because \sin(360+\theta)=\sin\theta

\Rightarrow \sin(180^\circ-60^\circ)             \because 120=180-60

\Rightarrow \sin(60^\circ)                       \because \sin(180-\theta)=\sin\theta

\Rightarrow \dfrac{\sqrt{3}}{2}

Therefore, sin(480°) = 0.866

7 0
3 years ago
Write the number in standard notation. 9.07 x 10−2
77julia77 [94]
Move over the # of decimal places as the negative exponent. 0.0907 is the correct answer!
Hope this helps, and please mark brainliest!

4 0
3 years ago
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Annette [7]
Hours spent practicing is 5.76 hours
5 0
3 years ago
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