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3 years ago

HELPP I NEED TO FINISH IT OR I GET A 50

Mathematics

2 answers:

Vikentia [17]3 years ago

6 0

Answer:

Step-by-step explanation:

doesnt have an equals sign

Aleks [24]3 years ago

3 0

Answer:

The second one, there is not = sign

2(4m+6)

Step-by-step explanation:

An equation is a mathematical statement that two things are equal. It consists of two expressions, one on each side of an 'equals' sign.

for it to be an equation there needs to be an equal sign

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Solve using law of sines or law of cosines!

malfutka [58]

Answer:

Part 5) The length of the ski lift is $1.15\ miles$

Part 6) The height of the tree is 18.12 m

Step-by-step explanation:

Part 5)

Let

A -----> Beginning of the ski lift

B -----> Top of the mountain

C -----> Base of mountain

we have

$b=0.75\ miles$

$A=20\°$

$C=180\°-50\°=130\°$ ----> by supplementary angles

Find the measure of angle B

Remember that the sum of the interior angles must be equal to 180 degrees

$B=180\°-A-C$

substitute

$B=180\°-20\°-130\°=30\°$

Applying the law of sines

$\frac{b}{sin(B)}=\frac{c}{sin(C)}$

substitute

$\frac{0.75}{sin(30\°)}=\frac{c}{sin(130\°)}$

$c=\frac{0.75}{sin(30\°)}(sin(130\°))$

$c=1.15\ miles$

Par 6)

see the attached figure with letters to better understand the problem

Applying the law of sines in the right triangle BDC

In the right triangle BDC 20 degrees is the complement of 70 degrees

$\frac{BC}{sin(70\°)}=\frac{x}{sin(20\°)}$

$BC=(sin(70\°))\frac{x}{sin(20\°)}$ -----> equation A

Applying the law of sines in the right triangle ABC

In the right triangle ABC 50 degrees is the complement of 40 degrees

$\frac{BC}{sin(40\°)}=\frac{x+15}{sin(50\°)}$

$BC=(sin(40\°))\frac{x+15}{sin(50\°)}$ -----> equation B

Equate equation A and equation B and solve for x

$(sin(70\°))\frac{x}{sin(20\°)}=(sin(40\°))\frac{x+15}{sin(50\°)}\\\\2.7475x=0.8391(x+15)\\\\2.7475x=0.8391x+12.5865\\\\2.7475x-0.8391x=12.5865\\\\x=6.60\ m$

Find the value of BC

$BC=(sin(70\°))\frac{6.6}{sin(20\°)}$

$BC=18.12\ m$

therefore

The height of the tree is 18.12 m

5 0

4 years ago

Simplify the expression -3 (4x -2) - 2x

raketka [301]

Answer:

-14x+6

Step-by-step explanation:

-3(4x-2)= -2x = -14x+6

-3(4x -2) -2

-12x+6 -2x

5 0

4 years ago

The length of a hypotenuse of a 30-60-90 right triangle is 17 yds. find the other two lengths

n200080 [17]

The length opposite the 30 is 8.5 yds and the length opposite the 60 is 8.5✓3 yds

5 0

3 years ago

Solve showing all work and simplify completely: 9/18 + 1/3 =

Rina8888 [55]

9/18+1/3= 10/21

thats the answer

3 0

2 years ago

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Find the area of the shaded region in the figure below.

Blababa [14]

Area of rectangle=> L•l= 8•5= 40 in²
Area of the triangle=> (b•h)/2= (8•3)/2= 24/2= 12 in²

Area of the shadowed surface is 40-12= 28 in²

6 0

4 years ago

Read 2 more answers