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
vovangra [49]
3 years ago
15

Triangles and algebra

Mathematics
1 answer:
Elanso [62]3 years ago
3 0

Hello from MrBillDoesMath!

Answer:

x = 10


Discussion:

A plane triangle contains 180 degrees. Adding the angles in the triangle shown in  #8 gives

(4x + 7) + (3x + 13) + 90 = 180


Note the "right angle" shown in the triangle has been replaced by its 90 degree equivalent in the above equation.

Combining like terms gives


( 4x + 3x) + (7 + 13) + 90 = 180

7x + 20 + 90 = 180 =>                      (subtract 90 from each side)

7x + 20 + 90 - 90 = 180 - 90 = 90  =>

7x +20 = 90  =>                                (subtract 20 from each side)

7x + 20 -20 = 90 -20 =>

7x = 70 =>

x 70/7 =10.



Thank you,

MrB

You might be interested in
Use the formula to factor n8 – 9
gulaghasi [49]
Hi!

The correct answer is (n^{4}+3)(n^{4}-3)
3 0
3 years ago
What is the solution for these lines<br> (line a ) x+2y=4<br> (line b ) 3x-2y=4
Amanda [17]
X+2y=4
3x-2y=4
4x=8
x=2
2+2y=4
2y=2
y=1

y=1
x=2

Hope this helps :)
3 0
3 years ago
Read 2 more answers
You are remodeling your kitchen. You've contacted two tiling companies who gladly told you how long it took their workers to til
quester [9]
Ok so pete lays 10 more than jim per hour

pete and jim laid same amount of tiles

j=jim's rate
p=pete's rate

6j=5p

but pete lays 10 tile per hour faster so
p=10+j

sub
6j=5(10+j)
6j=50+5j
minus 5j both sides
j=50


jim can lay at 50 tiles per hour
7 0
3 years ago
Read 2 more answers
Pizza take 20 minutes to cook. For pizzas can be cooked at one time in the pizza oven. How long would it take to cook 10 pizzas
ZanzabumX [31]
You'd fine the unit rate, in the context of the problem it would be how many minutes it takes for 1 pizza to cook
20/4= 5 minutes for 1 pizza
we are finding how long it would take to cook 10
5 times 10= 50, so 50 minutes
8 0
3 years ago
What is the perimeter and area of 9ft width and 8ft Long?
Sever21 [200]

Answer:

Perimeter = 34ft Area = 72ft squared

Step-by-step explanation:

The perimeter of an object is all of it's sides combined. Because you stated two values, I assumed your shape is a rectangle. So the perimeter would be:

8 + 8 + 9 + 9 = 34

The area is length times width, so:

8 x 9 = 72

Because it is area, the units are squared.

3 0
3 years ago
Other questions:
  • What does x equal 22x-36+40=180
    12·1 answer
  • 3.
    13·1 answer
  • A sample of 100 wood and 100 graphite tennis rackets are taken from the warehouse. if 13 wood and 10 graphite are defective and
    12·1 answer
  • SOMEONE HALP MEEEE<br><br> I HAVE ZERO IDEA WHAT IM DOING
    8·2 answers
  • Solve the equation for X<br> 4=6/ax+5
    13·1 answer
  • Help me with this math problem
    5·2 answers
  • Which function is not a linear function?
    8·1 answer
  • The consecutive angles of a rectangle are supplementary
    15·1 answer
  • Is it only me or does every body feel stressed about all the work they get from school?!
    7·2 answers
  • I'm really confused and need help.​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!