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
Gelneren [198K]
3 years ago
10

Find the value of x (really need help with this)

Mathematics
1 answer:
qwelly [4]3 years ago
4 0

Answer:

x=-7

Step-by-step explanation:

The sum of the angles of a triangle are 180 degrees

40 + x+57 + 90 =180

Combine like terms

187 +x = 180

Subtract 187 from each side

187-187 +x = 180-187

x = -7

You might be interested in
Identify the angle measures of PQRS.
kap26 [50]
The opposite angles of an inscribe quadrilateral are supplementary.

angle P + angle R = 180
6x + 7 + 12x + 11 = 180
18x + 18 = 180
18x = 162
x = 9

Now we will substitute in the value of x to find angle P and R.

angle P = 6(9)+7 = 61
angle R = 12(9)+11 = 119

Now we will find the value of y.

angle Q + angle S = 180
10y + 7 + 3(3y + 7) = 180
10y + 7 + 9y + 21 = 180
19y + 28 = 180
19y = 152
y = 8

Now substitute in the value of y to find angle Q and S.

angle Q = 10(8)+7 = 87
angle S = 3(3*8+7) = 93

Hope this helps :)
7 0
3 years ago
There are 14 dogs in a particular class at a dog show. Blue, red, yellow, and white ribbons will be awarded to the first through
stira [4]
There are 14 possibilities for first place.
There are 13 possibilities for second place, since a dog can't get both first and second place.
There are 12 possibilities for third place, since a dog can't get both first, second, and third place.
There are 11 possibilities for fourth place, since a dog can't get both first, second, third, and fourth place.

Multiply them together and get 24024 possibilities.

Hope this helps!

4 0
3 years ago
The yearbook club has 5 members returning from last year. They set up a booth in the cafeteria to recruit more members, and an a
garri49 [273]

Answer:

yeah ☺️

Step-by-step explanation:

is it helpful or not,?

4 0
3 years ago
Kara has 21 collectible buttons to sell. She sells the small buttons for $3 and the large buttons for $4, and earns a total of $
Serga [27]
We know that there are 21 buttons total. x is the number of small buttons and y is the number of large buttons. 

Therefore, our first equation should be x+y = 21.

We know the small buttons sell for 3 dollars, meaning 3x represents how much is made from the small buttons. The larger buttons sell for 4 dollars, meaning 4y is how much is made from the large buttons. 

We also know that the total of the buttons sold is 68 dollars. Therefore 3x + 4y = 68 is our second equation.

From this information, the answer is the first set.

5 0
3 years ago
The scale on a map is 2cm = 25 miles. Dave measured the distance to the next town at 5cm. How many miles away is the next town?
lbvjy [14]

Answer: 62.5 miles away.

Step-by-step explanation: divide 25 by 2, than multiply that by 5, you will get 62.5.

7 0
3 years ago
Read 2 more answers
Other questions:
  • What is the quotient of StartFraction negative 8 x Superscript 6 Baseline Over 4 x Superscript negative 3 Baseline EndFraction?
    14·1 answer
  • Which of the following is the correct way to write seventy million as a numeral?
    13·1 answer
  • Write 4.32 in word form
    11·2 answers
  • Please help me out ‼️
    9·2 answers
  • Shelby tossed 3 quarters into the air. What is the probability that all 3 quarters will land heads up
    15·1 answer
  • Rasputen and his three buddies are splitting a giant 18 inch cookie. But notice 1/4 of it is missing. If each person gets the sa
    14·1 answer
  • Jonathan used completing the square to find the maximum value of the quadratic expression -x^2 - 4x + 1. What is the maximum val
    8·1 answer
  • What do you think the purpose of this survey is? Explain.
    9·1 answer
  • Ellus
    6·1 answer
  • Which of the following sequences are geometric?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!