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
Lerok [7]
3 years ago
6

2x+8y=6, -5x-20y=-15need work because I don't understand

Mathematics
1 answer:
Vlada [557]3 years ago
4 0

Answer:

Infinitely many solutions.

Step-by-step explanation:

Step: Solve 2x + 8y = 6 for x:

2x + 8y = 6

2x + 8y + −8y =6 + −8y (Add -8y to both sides)

2x = −8y + 6

2x/2 = (-8y + 6)/2 (Divide both sides by 2)

x = −4y + 3

Step: Substitute −4y + 3 for x in −5x − 20y = −15:

−5x − 20y = −15

−5 (−4y + 3 ) −20y = −15

−15 = −15 (Simplify both sides of the equation)

−15 + 15 = −15 + 15 (Add 15 to both sides)

0 = 0


You might be interested in
Two trucks leave a warehouse at the same time. one travels due west at an average speed of 49 miles per hour, and the other trav
Gre4nikov [31]

Well there can be two different solutions for this but i will choose the easier one. Obviously one requires a system of equations which obviously will involve a lot of thinking and some good algebra solving in order for them to solve.

So we can just keep adding the distance as we know they are in different directions. 49 + 65 = 114. So 114 * 4.5 = 513 miles. SO after around 4.5 hours they will be 513 miles apart.

4 0
3 years ago
Need help with number 3 inequalities with variables on both sides
Volgvan

Answer:

x ≤ 2

Step-by-step explanation:

We are given the inequality:

\displaystyle{2x-3 \leq \dfrac{x}{2}}

First, get rid of the denominator by multiplying both sides by 2:

\displaystyle{2x\cdot 2-3\cdot 2 \leq \dfrac{x}{2}\cdot 2}\\\\\displaystyle{4x-6 \leq x}

Add both sides by 6 then subtract both sides by x:

\displaystyle{4x-6+6 \leq x+6}\\\\\displaystyle{4x \leq x+6}\\\\\displaystyle{4x-x \leq x+6-x}\\\\\displaystyle{4x-x \leq 6}\\\\\displaystyle{3x \leq 6}

Then divide both sides by 3:

\displaystyle{\dfrac{3x}{3} \leq \dfrac{6}{3}}\\\\\displaystyle{x \leq 2}

Therefore, the answer is x ≤ 2

5 0
2 years ago
Read 2 more answers
Four grey regular polygons join together as shown in the diagram<br><br> please answer part b
Wittaler [7]

Answer:

a=72° b = 6°

Step-by-step explanation:

answer is in pic

8 0
2 years ago
Choose all the numbers that 810 is divisible by.
Aleks04 [339]
810/2= 405

810/3= 270

810/4= 202.5 (not this one)

810/5= 162

810/6= 135

810/7= 115.71 ( not this one)

810/8= 101.25 (not this one)

810/9= 90

810/10= 81

810/11= 73.63 (not this one)

I hope this helps you!
3 0
3 years ago
Let r(d) represent the monthly revenue, in dollars, from selling skateboards when the price of a skateboard has been decreased b
vodka [1.7K]

Answer:

A.\ \ r(d)=-100(d-25)^2+122,500

Hope this helps!

3 0
3 years ago
Other questions:
  • 2 percent of the value of $150,000
    6·1 answer
  • Factor 2x^2+x-3 please
    10·2 answers
  • Please help!<br> -300<br> 120<br> 300
    7·1 answer
  • If the number 38,469 is rounded to the nearest thousand, how many zeros does the rounded number have?
    13·2 answers
  • 170 is one tenth of 17 true or false
    9·2 answers
  • What is the range of this function?
    10·2 answers
  • Graph y=-2(x+1)^2+4 (must show all work that leads to your graph) please help
    13·1 answer
  • Find the differential equation of this function and indicate the order y = e^3x (acos3x +bsin3x)​
    8·1 answer
  • a bag has red, green and blue marbles. The probability of selecting a red marble is 1/3 and the probability of selecting a green
    15·1 answer
  • Which sets of numbers represent geometric sequences? Check all that apply.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!