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
Contact [7]
3 years ago
11

Linear equation using substitution x=16-4y 3x+4y=8

Mathematics
1 answer:
jarptica [38.1K]3 years ago
4 0
If x=16-4y then in your other equation 3x+4y=8 you can put that where x is to get:

3(16-4y)+4y=8

Then multiply brackets to get:

48-12y+4y=8

Simplify:

48-8y=8

Rearrange:

40=8y

Divide through by 8:

y=5

Then put y=5 back into x=16-4y to get x:

x=16-4(5)
x=16-20
x=-4
You might be interested in
What is 1/2 + 4/3 + 3/2 + 4/3 + 10/6 = ??<br> (they are fractions)
Jet001 [13]

6 and 1/3 or 19/3 or if you need the decimal 6.3 repeating

4 0
3 years ago
Read 2 more answers
What are the domain and range of each relation?
torisob [31]

Order pairs  given coordinates on the graph: {(−3, 1), (−3, -4), (−1, 1), (1, -1), (4,4)}.


We need to find the domain and range.


<em>Domain of the order pairs are x values of each coordinate and range is the y values of each given coordinate.</em>


Each first value of order pair are the x values and each second value of each order pair are the y values.


In the given coordinates on the graph (−3, 1), (−3, -4), (−1, 1), (1, -1), (4,4), we can see first values are { -3,-1, 1, 4}


and we can see second values are { -4, -1, 1, 4}.

<h3>Therefore, Domain : { -3,-1, 1, 4} and </h3><h3>Range : { -4, -1, 1, 4}</h3>

3 0
4 years ago
A brick has a volume of 2,300 mL and a mass of 3.4 kg. what is the density of the brick
charle [14.2K]
The formula of a density is
p = M/V
where p is a density, M is a mass and V is a volume.
Given M = 3.4 kg and V = 2,300 mL or 2,300 cm<span>³, therefore
</span>p = 3.4 kg / 2,300 cm³ = 1.48 x 10⁻³ kg/cm³

5 0
4 years ago
Solve the equations 1. 16x^2-1=0 2. 36z^2 96z 15=0
Allisa [31]
16x^2-1=0 2 

16x^2-1=0 2:x 

&#10;16x^2=1&#10; &#10;   |Add \ 1 \ to \ both \ sides|

x^2= \dfrac{1}{16}   |Divide \ both \ sides \ by \ 16|<span>
</span>
x^2= \sqrt{\dfrac{ \sqrt{1}}{ \sqrt{16}}}  |Take \ the \ square \ root \ of \ both \ sides|

x= \dfrac{1}{4}


5 0
3 years ago
Triangles Very Easy PIC INCLUDED
denpristay [2]

Answer:

sin30° and cos60°

Step-by-step explanation:

We can see that we can use multiply trig identities to solve for <em>r</em>:

sin30° = r/20

r = 20sin30°

cos60° = r/20

r = 20cos60°

8 0
3 years ago
Other questions:
  • A computer was on a scale for 2/3 of the original price.If the original price was 900,what was the sale price
    15·1 answer
  • alicia takes 4 white 2 red and 3 lue shirts on the trip. on the first day alicia will pick a shirt at random. what is the probab
    7·2 answers
  • HELP ME PLEASE!!!!!!!!!
    11·1 answer
  • What are the coordinates of D’ when the quadrilateral is reflected across the line y = x? On a coordinate plane, quadrilateral A
    14·1 answer
  • Is 4.086 greater than 5.025?
    7·2 answers
  • Thanks for helping me two more problems
    8·1 answer
  • How is it false, please explain
    10·1 answer
  • the diameter of a pearl is about 4×10-¹⁴ cm and the diameter of an atom is about 10-¹¹ m. how much larger than an atom is a pear
    5·1 answer
  • Perform the indicated operations: 4−1−4 −462 8−46 −7 −4 30 4−1−4 −462 −7 −4
    5·2 answers
  • Calculate the distance between the points K= (-8, 0) and Q= (-3, -3) in the coordinate plane round your answer to the nearest hu
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!