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Maru [420]
3 years ago
11

I NEED HELP!! thank u;-)

Mathematics
2 answers:
jok3333 [9.3K]3 years ago
7 0
Assuming you are referring to centigrams and decigrams, the correct answer is 80 cg.
lana66690 [7]3 years ago
3 0
9cg is your answer because 8 + 1 is 9 and 8 times 1 plus 1 is 9
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What is the area of a 12cm semi circle
Marysya12 [62]

Answer:radius = diameter/2=12/2=6cm...

area of semicircle = πr^2/2

={3.14×(2)^2}/2

=6.28cm^2.......

Step-by-step explanation:

5 0
2 years ago
If cos Θ = square root 2 over 2 and 3 pi over 2 < Θ < 2π, what are the values of sin Θ and tan Θ? sin Θ = square root 2 ov
densk [106]

Answer:

\huge\boxed{\sin\theta=-\dfrac{\sqrt2}{2};\ \tan\theta=-1}

Step-by-step explanation:

We have:

\\cos\theta=\dfrac{\sqrt2}{2},\ \dfrac{3\pi}{2}

For sine use:

\sin^2x+\cos^2x=1\to\sin^2x=1-\cos^2x

Substitute:

\sin^2\theta=1-\left(\dfrac{\sqrt2}{2}\right)^2\\\\\sin^2\theta=1-\dfrac{(\sqrt2)^2}{2^2}\\\\\sin^2\theta=1-\dfrac{2}{4}\\\\\sin^2\theta=\dfrac{4}{4}-\dfrac{2}{4}\\\\\sin^2\theta=\dfrac{4-2}{4}\\\\\sin^2\theta=\dfrac{2}{4}\to\sin\theta=\pm\sqrt{\dfrac{2}{4}}\\\\\sin\theta=\pm\dfrac{\sqrt2}{\sqrt4}\\\\\sin\theta=\pm\dfrac{\sqrt2}{2}

θ in IV quadrant, therefore sine is negative.

\sin\theta=-\dfrac{\sqrt2}{2}

For tangent use:

\tan x=\dfrac{\sin x}{\cos x}

Substitute:

\tan\theta=\dfrac{-\frac{\sqrt2}{2}}{\frac{\sqrt2}{2}}=-\dfrac{\sqrt2}{2}\cdot\dfrac{2}{\sqrt2}=-1

8 0
3 years ago
Which of the following cannot be simplified ?
klemol [59]
The answer is going to be C because you cannot take the square root of 3 and 13. Which means you cannot simplify the square root of 39 any further
5 0
3 years ago
Read 2 more answers
Julie box contains two gold hoop earrings and two silver hoop earrings you randomly choose to errands what is the probability th
vesna_86 [32]

The total number of elements is 2+2=4. Since we have 2 silver earrings, we get

P(two\text{silver earrings)}=\frac{1}{4}+\frac{1}{4}=\frac{2}{4}=\frac{1}{2}

the, the probability to get two silver earrings is 1/2, which is equivalent to 0.5.

5 0
1 year ago
Leah is buying curtains for her bedroom. She wants the curtains to hang from the top of the window to the floor. The window is 4
mash [69]
78 inches because 4 + 2.5 = 6.5 and 6.5•12= 78
7 0
3 years ago
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