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3 years ago

Help.....................

Mathematics

1 answer:

marta [7]3 years ago

5 0

Answer:

180

Step-by-step explanation:

That's the answer.

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Find the value of x that will allow you to prove that CD below is parallel to EF if the measure of 21 is

irina1246 [14]

Answer:

Step-by-step explanation:

According to the diagram, two sum of <1 and <2 is 180 degrees

Hence 3x+30+81 = 180

3x+111 = 180

3x =180-111

3x = 69

x = 69/3

x = 23

8 0

3 years ago

I need help asap with this whole question!! what is the answer? with work. please!!

WARRIOR [948]

Answer:

the other percentage is 70 percent if thats what your asking.

Step-by-step explanation:

6 0

3 years ago

Find the coordinates of the point P at an angle of 45 degrees on a circle of radius 4.5. Round your answer to 3 decimal places.

Varvara68 [4.7K]

$\bf sin(\theta)=\cfrac{y}{r}
\qquad 

% cosine
cos(\theta)=\cfrac{x}{r}\quad 
\begin{cases}
r=radius=hypotenuse\\
x=adjacent\\
y=opposite\\
\theta=angle
\end{cases}\\
-----------------------------\\
thus
\\\\

\begin{cases}
r=4.5\\
\theta=45^o
\end{cases}\implies 
\begin{cases}
sin(\theta)=\cfrac{y}{r}\to sin(45^o)=\cfrac{y}{4.5}\to 4.5\cdot sin(45^o)=y
\\\\
cos(\theta)=\cfrac{x}{r}\to cos(45^o)=\cfrac{x}{4.5}\to 4.5\cdot cos(45^o)=x
\end{cases}
\\\\
P\ is \ at\quad (x,y)$

the angle is in degrees, thus, when taking either sine or cosine, make sure your calculator is in Degree mode

7 0

4 years ago

Express 8 sin^2x - 10sinxcosx in the form a+b sin(2x+c).

ladessa [460]

8 sin2x - 10sinxcosx = 8*2sinXcosX-10sinXcosX = 16sinXcosX - 10sinXcosX = 6sinXcosX=3sin2x

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3 years ago

Write 1.49 x 10^-7 in standard form

Eduardwww [97]

Answer:

1.49

Step-by-step explanation:

$1.49 \times 0.0000001 = 0.000000149 = 1.49$

in this problem you also need to use scientific notation period to do scientific notation you need to go to the first non-zero digit after the decimal . and in this case that is one next thing you do is put the next numbers after the decimal that you just put in front of the one which is 49 in this case and that gives you your answer of 1.49

6 0

4 years ago