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
Rasek [7]
3 years ago
14

X+78=3x-2 ..................

Mathematics
1 answer:
photoshop1234 [79]3 years ago
6 0

Answer:

x=40

Step-by-step explanation:

x+78=3x-2\\\mathrm{Subtract\:}78\mathrm{\:from\:both\:sides}\\x+78-78=3x-2-78\\x=3x-80\\\mathrm{Subtract\:}3x\mathrm{\:from\:both\:sides}\\x-3x=3x-80-3x\\\\

-2x=-80\\\frac{-2x}{-2}=\frac{-80}{-2}\\x=40

You might be interested in
I need help on 19 and 20. Please help me. Please don’t put a link. Please help me.
lianna [129]

Answer:

19:

4  <   third side    <   14  

20:

3  <   third side    <   13  

Step-by-step explanation:

hint: go to http://www.17 28.org/trianinq.htm

(fix the space between 17 and 28)

you're welcome xx

6 0
2 years ago
Select the number and name of the terms below (select 2): 2121
mihalych1998 [28]
Its a monomial and it has 4 terms
6 0
3 years ago
Find the surface area of the triangular prism shown below .
Wewaii [24]

Answer:

the surface area should be 544 (whatever the unit is)

Step-by-step explanation:

You start by taking the rectangles on the side and finding their area.

1. (10×14)×2 ←Because there are two rectanglular sides.

2. find the area of the triangles on the side. 1/2bh = area of triangle.

(.5×8×6)×4 ← in order to find the area for all of the triangles.

3.  lastly take the base of the prism and find the area then add the previously found values together.

(12×14)+(.5×8×6)×4+ (10×14)×2 = 544

7 0
3 years ago
Help anyone can help me do this question 3,I will mark brainlest.​
malfutka [58]

Answer:

see explanation

Step-by-step explanation:

Calculate the slopes between pairs of the 3 points using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (- 9, 3) and (x₂, y₂ ) = (- 3, 9)

m = \frac{9-3}{-3-(-9)} = \frac{6}{-3+9} = \frac{6}{6} = 1

Repeat with (x₁, y₁ ) = (5, 1) and (x₂, y₂ ) = (- 3, 9)

m = \frac{9-1}{-3-5} = \frac{8}{-8} = - 1

If lines are perpendicular then the product of their slopes = - 1 , then

1 × - 1 = -1

Thus there is a right angle between the 2 lines

Then triangle is right- angled

8 0
3 years ago
THIS IS IREADY PLEASE HELP RIGHT ANSWER (Only)
k0ka [10]

Answer Bike trail

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Solve for -(6h+7)+8=-19
    13·1 answer
  • Rewrite 0.169 in expanded form using powers of ten. A) (1×103) + (6×102) + (9×101) B) (1×101) + (6×102) + (9×103) C) (1×10-1) +
    15·1 answer
  • If (9x − 4)(9x + 4) = ax^2 − b, what is the value of a?
    8·2 answers
  • What is the elimination method for this problem<br> 4x-3y=22<br> 2x-y=10
    5·2 answers
  • Pentagon ABCDE ~ Pentagon FGHIJ. If CD=14, DE=19, and IJ=42, what is the length of HI.
    14·1 answer
  • The following data set shows the number of children in each household in Cam's neighborhood.
    13·1 answer
  • Paul has 30$ to spend at the fair if the admission to the fair is 5$ and the rides cost 3.50 each how many rides can paul go on
    11·2 answers
  • Find the values of x and y for which ABCD must be a parallelogram.?
    8·2 answers
  • If it takes 1074 digits to number the pages of a book starting with page 1. how many pages are in the book? The book has a total
    5·1 answer
  • Income Statements under Absorption Costing and Variable Costing
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!