1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ololo11 [35]
2 years ago
13

I will mark u brainliest please help

Mathematics
2 answers:
musickatia [10]2 years ago
6 0

Answer:

30+(2x+7)+63=180(sum of angles of triangle )

30+2x+7+63=180

2x+100=180

2x=180-100

x=80/2

x=40

ELEN [110]2 years ago
4 0

Answer:

\boxed {\boxed {\sf (2x+7)+30+63= 180}}

\boxed {\boxed {\sf x=40}}

Step-by-step explanation:

We are asked to write an equation to solve for x and use the equation to find x.

We know that the angles in a triangle must add to 180 degrees. Therefore, the sum of the three angles in this triangle: 30, 63, and (2x+7) must equal 180. We can set up an equation.

(2x+7)+ 30 +63= 180

Now we can use the equation to solve for x. First, we combine like terms on the left side of the equation. The 3 terms without variables or constants can be added.

2x+ (7+30+63)= 180

2x+ (100)= 180

We are solving for x, so we must isolate the variable. 100 is being added to 2x. The inverse operation of addition is subtraction. Subtract 100 from both sides of the equation.

2x+100-100= 180-100 \\2x=180 -100 \\2x=80

x is being multiplied by 2. The inverse operation of multiplication is division. Divide both sides of the equation by 2.

\frac {2x}{2}= \frac{80}{2}

x= \frac {80}{2} \ \\

x=40

The equation is (2x+7)+ 30+63= 180 and x is equal to 40.

You might be interested in
Using 3.14 for 7, a sphere has a volume of 904.32 mm.
Alla [95]

Answer:

v =  \frac{4}{3} \pi {r}^{3 }  \\ 904.32 =  \frac{4}{3}  \times 3.14 \times   {r}^{3}   \\  {r}^{3}  =  \frac{3 \times 904.32}{4 \times 3.14}  = 21.57 \\ r = 2.78

then Radias equal to 5.5676

Step-by-step explanation:

I can help you solve what you want in mathematics in exchange for some money. If you want to, you can inform me about it and I will help you.

7 0
2 years ago
Work out the size of angle x
vfiekz [6]

Answer:

104 degrees

Step-by-step explanation:

90 + 54 + 132 = 276

360 - 276 = 104

6 0
2 years ago
Read 2 more answers
Multiply the trinomials.
lora16 [44]

Answer:

b

Step-by-step explanation:

8 0
3 years ago
I will give you BRAINLIEST
Sedbober [7]

Answer:

250

Step-by-step explanation:

If 5:7 = ?:350.

Since 350/7=50.

Multiply 5x50 =250.

Hope this helps! Have a great day!

3 0
2 years ago
A ship leaves port at 10 miles per hour, with a heading of N 35° W. There is a warning buoy located 5 miles directly north of th
Leno4ka [110]

The value of the angle subtended by the distance of the buoy from the

port is given by sine and cosine rule.

  • The bearing of the buoy from the is approximately <u>307.35°</u>

Reasons:

Location from which the ship sails = Port

The speed of the ship = 10 mph

Direction of the ship = N35°W

Location of the warning buoy = 5 miles north of the port

Required: The bearing of the warning buoy from the ship after 7.5 hours.

Solution:

The distance travelled by the ship = 7.5 hours × 10 mph = 75 miles

By cosine rule, we have;

a² = b² + c² - 2·b·c·cos(A)

Where;

a = The distance between the ship and the buoy

b = The distance between the ship and the port = 75 miles

c = The distance between the buoy and the port = 5 miles

Angle ∠A = The angle between the ship and the buoy = The bearing of the ship = 35°

Which gives;

a = √(75² + 5² - 2 × 75 × 5 × cos(35°))

By sine rule, we have;

\displaystyle \frac{a}{sin(A)} = \mathbf{ \frac{b}{sin(B)}}

Therefore;

\displaystyle sin(B)= \frac{b \cdot sin(A)}{a}

Which gives;

\displaystyle sin(B) = \mathbf{\frac{75 \cdot sin(35^{\circ})}{\sqrt{75^2 + 5^2 - 2 \times 75\times5\times cos(35^{\circ}) } }}

\displaystyle B = arcsin\left( \frac{75 \cdot sin(35^{\circ})}{\sqrt{75^2 + 5^2 - 2 \times 75\times5\times cos(35^{\circ}) } }\right) \approx 37.32^{\circ}

Similarly, we can get;

\displaystyle B = arcsin\left( \frac{75 \cdot sin(35^{\circ})}{\sqrt{75^2 + 5^2 - 2 \times 75\times5\times cos(35^{\circ}) } }\right) \approx \mathbf{ 142.68^{\circ}}

The angle subtended by the distance of the buoy from the port, <em>C</em> is therefore;

C ≈ 180° - 142.68° - 35° ≈ 2.32°

By alternate interior angles, we have;

The bearing of the warning buoy as seen from the ship is therefore;

Bearing of buoy ≈ 270° + 35° + 2.32° ≈ <u>307.35°</u>

Learn more about bearing in mathematics here:

brainly.com/question/23427938

5 0
2 years ago
Other questions:
  • Please help i don’t know what answers apply
    8·2 answers
  • In percent of change what is 10 to 20
    9·1 answer
  • 122 patients in 4 weeks
    11·1 answer
  • The school that Scott goes to is selling tickets to a fall musical. On the first day of ticket sales the school sold 12 adult ti
    8·1 answer
  • In 2010, it cost $3.29 for a gallon of milk, while in 2000, the cost was $2.69.
    10·2 answers
  • Ex 4) Find the unit price for 6.5 pounds of apple for $12.95.
    9·1 answer
  • Use benchmark values to estimate 7/10 + 7/8.​
    5·1 answer
  • Formula for the flow of current in an electrical<br> circuit, V= IH, for I
    15·1 answer
  • b) if your friend wants to be as happy as possible, how many cheeseburgers should he eat? How do you know ? Answer question B
    5·1 answer
  • How has the Roaring Twenties been portrayed in modern media? ​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!