Ask question

Ask question

All categories

3 years ago

10

Pls help i have no idea how to do this Find the Missing angles

1 answer:

Semenov [28]3 years ago

8 0

To be honest I just know that #1 is 143 (I think)

You might be interested in

The diameter of a circle is 13 in. Find the circumference to the nearest tenth.

klemol [59]

circumference equals 40.84

3 0

3 years ago

When I was 6 my sister was half my age<br><br> Now I'm 70 how old is my sister?

mrs_skeptik [129]

She would be 67...always going to be 3 years younger

6 0

4 years ago

Read 2 more answers

A car is moving at a fixed speed. The distance D that the car covers is then directly proportional to the time T it moves.

worty [1.4K]

We were told that the distance $D$ is directly proportional to the time $T$ .

We write this mathematically as,

$D\propto T$

We can now introduce our constant of variation and write the equation for the direct equation as;

$D=kT$

where $k$ is the constant of variation or constant of proportionality.

We substitute $D=20$ and $T=15$ , in to the equation of variation to obtain the constant of proportionality.

That is;

$20=k\times15$

This implies that,

$\frac{20}{15}=k$

This simplifies to give us,

$k=\frac{4}{3}$

Now our equation of proportion becomes,

$D=\frac{4}{3}$

When T=20

$D=\frac{4}{3}\times20$

$D=\frac{80}{3}$

Writing this as a mixed number we obtain,

$D=26\frac{2}{3}$

This can also be rewritten as

$D=26.67$ correct to one decimal places.

Therefore the care covers $26.67$ miles in $20$ minutes.

6 0

3 years ago

A point H is 20m away from the foot of a tower on the same horizontal ground. From the point H, the angle of elevation of the po

astra-53 [7]

Answer:

a. See Attachment 1

b. $PT = 12.3\ m$

c. $HT = 31.1\ m$

d. $OH = 28.4\ m$

Step-by-step explanation:

Calculating PT

To calculate PT, we need to get distance OT and OP

Calculating OT;

We have to consider angle 50, distance OH and distance OT

The relationship between these parameters is;

$tan50 = \frac{OT}{20}$

Multiply both sides by 20

$20 * tan50 = \frac{OT}{20} * 20$

$20 * tan50 = OT$

$20 * 1.1918 = OT$

$23.836 = OT$

$OT = 23.836$

Calculating OP;

We have to consider angle 30, distance OH and distance OP

The relationship between these parameters is;

$tan30 = \frac{OP}{20}$

Multiply both sides by 20

$20 * tan30 = \frac{OP}{20} * 20$

$20 * tan30 = OP$

$20 * 0.5774= OP$

$11.548 = OP$

$OP = 11.548$

$PT = OT - OP$

$PT = 23.836 - 11.548$

$PT = 12.288$

$PT = 12.3\ m$ (Approximated)

--------------------------------------------------------

Calculating the distance between H and the top of the tower

This is represented by HT

HT can be calculated using Pythagoras theorem

$HT^2 = OT^2 + OH^2$

Substitute 20 for OH and $OT = 23.836$

$HT^2 = 20^2 + 23.836^2$

$HT^2 = 400 + 568.154896$

$HT^2 = 968.154896$

Take Square Root of both sides

$HT = \sqrt{968.154896}$

$HT = 31.1\ m$ <em>(Approximated)</em>

--------------------------------------------------------

Calculating the position of H

This is represented by OH

See Attachment 2

We have to consider angle 50, distance OH and distance OT

The relationship between these parameters is;

$tan50 = \frac{OH}{OT}$

Multiply both sides by OT

$OT * tan50 = \frac{OH}{OT} * OT$

$OT * tan50 = {OH$

$OT * 1.1918 = OH$

Substitute $OT = 23.836$

$23.836 * 1.1918 = OH$

$28.4= OH$

$OH = 28.4\ m$ <em> (Approximated)</em>

5 0

3 years ago

What is the answer 1/3 (9x+3) = 3x + 1

Harman [31]

Answer:

All real numbers are solutions to this equation

Step-by-step explanation:

$\frac{9x+3}{3} =3x+1\\\frac{3(3x+1)}{3} =3x+1\\3x+1=3x+1$

3 0

3 years ago