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
Leto [7]
2 years ago
8

Plz put the work clearly plzz I really need these

Mathematics
1 answer:
Dmitrij [34]2 years ago
8 0

Answer:

m∠C = 26°

m∠D = 108°

m∠E = 46°

Step-by-step explanation:

Set up the equation adding the expressions together to equal 180 (sum of all angles in a triangle)

(2x) + (x+3) + (5x-7) = 180

Remove the parentheses

2x + x+ 3 + 5x - 7 = 180

Add like terms

8x - 3 -7 = 8x -4 = 180

8x - 4 = 180

Add 4 on each side to cancel it out on the right

8x - 4 = 180

     +4   = +4

8x = 184

Divide each side by 8 to get the variable by itself

8/8 =1    184/8 = 23

x = 23

Substitute x in eac expression

2x = 2(23) = 46°

x + 3 = 23 + 3 = 26°

5x - 7 = 5(23) - 7 = 115 -7 = 108

Chek it by adding all the degrees to make sure it equals 180

46 + 26 + 108 = 72 + 108 = 180

You might be interested in
A piece of steel pipe 12.5 feet long weighs 158 pounds. How much does a piece of the same steel pipe 18.75 feet long weigh?
jonny [76]

Answer:

18.75 feet of steel pipe weighs 237 pounds  

explanation:

find out how much 1 feet weighs than u can find out how much 18.75 feet.

by doing it like this  

158÷ 12.5

=12.64

1 feet equals 12.64 pounds

12.64× 18.75

=237 pounds this is the answer

i do apologize if it wrong

8 0
3 years ago
Read 2 more answers
Carlos earned $112 for 8 hours of work. AT THIS RATE, how much will he
eimsori [14]

Answer:

he earns $14 per hour so multiply 14 by 40=560

4 0
3 years ago
Read 2 more answers
a triangle has perimeter 38cm. a square has perimeter 48cm. two sides of the shapes are put together to make a pentagon. what is
melomori [17]

Answer:

perimeter of Pentagon is 62 CM

perimeter of triangle is equal to 38 CM

perimeter of square is equal to 48 CM

therefore perimeter of one side of square is 48 divided by 4 is equal to 12 CM

perimeter of Pentagon is 62 CM

5 0
3 years ago
Read 2 more answers
Round this number to the nearest million<br><br> 135,458,267
Svet_ta [14]
1,000,000 is million
to round look at hundred thousand place or 100,000
see number before million (after comma)

if it is greater than or equal to 5, add 1 to current value of million and say all after is 0
if less than 5 then leave million value as is and make after 0


135,458,267
hundred thousand value is 4
4<5
135,000,000
4 0
3 years ago
A student estimated a mass for by 325g, but upon carefully mesuring it, found the actual mass to be 342g. What is the percent er
vlada-n [284]

Answer:

5.2307 %

Step-by-step explanation:

(acutal mass- estimated mass) / ( estimated mass)

7 0
3 years ago
Other questions:
  • Convert fraction to decimal
    5·1 answer
  • Please someone help me i dont know the answer
    11·2 answers
  • This table gives a few (2,y) pairs of a line in the coordinate plane.
    13·1 answer
  • WILL MARK YOU BRAINLIEST
    10·1 answer
  • This is the problem that I need help with please. :)
    10·1 answer
  • 2.the solution set of x +y =5 and x-y =3
    7·1 answer
  • True or false: This equation is a linear function.<br> y= r3 + 3<br> O True<br> O False
    14·2 answers
  • What does it mean when 6 people share 12 muffins
    11·1 answer
  • Using the quadratic formula to solve 5x = 6x²-3, what are the values of x?
    13·1 answer
  • The sum of a number x and 4 is less than 12 which of the following inequalities represents this statement
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!