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
slava [35]
3 years ago
15

Please help this is TIMED!!

Mathematics
2 answers:
Alja [10]3 years ago
6 0

Answer: x = 15, y = 6

Step-by-step explanation:

1). (7y - 1) + (9x + 4) = 180 (the are supplementary angles)

2). (4x-7) + (7y - 1) + 86 = 180 (sum of angles in a triangle)

7y - 1 + 9x + 4 = 180

7y + 9x + 3 = 180

9x + 7y = 177

4x - 7 + 7y - 1 + 86 = 180

4x + 7y - 8 + 86 = 180

4x + 7y + 78 = 180

4x + 7y = 102

Now solve the system of equations

subtract the two equations

9x + 7y = 177

-(4x + 7y) = -(102)

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

5x = 75

x = 15

Substitute the value of x into either equation to find y

4(15) + 7y = 102

60 + 7y = 102

7y = 42

y = 6

Gennadij [26K]3 years ago
5 0

Answer:

x=38

y=24

Step-by-step explanation:

You might be interested in
A line has a slope of 2 and a y-intercept of 0 what is its equation in slope intercept form
Leto [7]

Answer:

y = 2x

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
The Johnson twins were born four years after their older sister. This year, the product of the three siblings ages is exactly 34
svp [43]

Answer:

Step-by-step explanation:

Let age of each twin be x

let age of sister be s

So we can write:

x + 4 = s

The product of the 3 siblings ages is 3482 more than sum. We can write:

s*x*x=3482+(s+x+x)

This can be simplified as:

sx^2=3482+s+2x

We replace s with "x + 4" and solve:

(x+4)x^2=3482+x+4+2x\\x^3+4x^2=3486+3x\\x^3+4x^2-3x-3486=0\\x=14

<u>Note:</u> To solve this cubic, we used technology

Thus, we can say the twins are 14 years old

3 0
3 years ago
A) ¿Cuántas veces contiene la unidad base a la correspondiente del prefijo deci?
pshichka [43]

Answer:

Deci (símbolo d) es un prefijo del Sistema Internacional que indica un factor de 10−1 (1/10) o una décima parte.

7 0
11 months ago
movie tickets cost $9.25 each and a large order of popcorn costs $7.75 what is the total cost of 5 movie tickets and a large ord
Gelneren [198K]
The answer would be 54 dollars
8 0
3 years ago
Read 2 more answers
What is the way to best choose the answers
Sunny_sXe [5.5K]
The B option is the correct answer
7 0
3 years ago
Read 2 more answers
Other questions:
  • 1/2 <img src="https://tex.z-dn.net/?f=%5Csqrt%20%7B128%7D" id="TexFormula1" title="\sqrt {128}" alt="\sqrt {128}" align="absmidd
    6·2 answers
  • What number goes into both 14 and 49?
    8·1 answer
  • ou have just used the network planning model for a county road resurfacing project and found the critical path length is 40 days
    5·1 answer
  • Out of the following age groups when does the greatest price drop in full coverage insurance premiums occur?
    10·2 answers
  • A. Do some research and find a city that has experienced population growth.
    5·1 answer
  • If 3 is 1/4 what is the whole? (Division)
    13·1 answer
  • I need help<br> someone pls
    12·1 answer
  • My son is seven times older than my grandson and iam 12 times older than my grandson. All of our ages added together equal 100
    14·1 answer
  • Liz walks 1/2 mile in 20 minutes on Monday and 3 3/4 in 150 minutes on Sunday is this proportional or non -proportional
    14·2 answers
  • Find the height of the triangle: Area of the triangle = 21.6 cm 2 , base=3.6 cm
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!