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
Goryan [66]
3 years ago
13

Help plz I don't understand

Mathematics
1 answer:
IrinaVladis [17]3 years ago
7 0

Answer:

(-9,-3.4)

Step-by-step explanation:

By adding 2.1x and subtracting 5.3 from the top equation, it will end up as 2.1x=4y-5.3

By adding 5.5y to the bottom equation, it will end up as 2.1x=5.5y-0.2.

By the equal valuesmethod, they are equal: 5.5y-0.2=4y-5.3

5.5y+5.1=4y

5.1=-1.5y

y=-3.4; this gets us our y-coordinate.

To get the x-coordinate, you plug the value for y back into the original equation.

-2.1x-4y=5.3

-2.1x-4(-3.4)=5.3

-2.1x-13.6=5.3

-2.1x=18.9

x=-9

You might be interested in
How much would $500 invested at 6% interest compounded monthly be worth after 5 years
likoan [24]
\bf ~~~~~~ \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{original amount deposited}\to &\$500\\
r=rate\to 6\%\to \frac{6}{100}\to &0.06\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{monthly, thus twelve}
\end{array}\to &12\\
t=years\to &5
\end{cases}
\\\\\\
A=500\left(1+\frac{0.06}{12}\right)^{12\cdot 5}\implies A=500(1.005)^{60}\implies A\approx 674.42508
5 0
4 years ago
Problem PageQuestion It takes an older pump twice as long to drain a certain pool as it does a newer pump. Working together, it
umka2103 [35]

Answer:

It will take 6 hours for the new pump to drain the pool.

Step-by-step explanation:

As the complete question is not given, the complete question is found online and is attached herewith

Let the rate of new pump is given as x=W/t_1

Let the rate of the old pump is given as y=W/t_2

it is given that the time t_2=2t_1

So by substituting the values of t_2 in the rate equation of y

y=W/2t_1

y=(W/t_1*2)=x/2

Also the total rate of both the pumps is given as W/t3 where t3 is given as 4 hours so the equation becomes

x+y=W/4

x+x/2=W/4

3x/2=W/4

As x=W/t_1

3W/2t_1=W/4

Now as W is same on both sides so

3/2t_1=1/4

12=2t_1

t_1=6 hours

So it will take 6 hours for the new pump to drain the pool.

7 0
4 years ago
Find the midpoint of the segment with the following endpoints.<br> (10,7) and (5,4)
Anettt [7]

Answer: (7.5, 4.5)

Step-by-step explanation:

To find the midpoint, we can just find the average of the x values and the y values.

x=(10+5)/2=15/2=7.5

y=(5+4)/2=9/2=4.5

7 0
3 years ago
A model of a car uses a scale of 2 1/4 inches = 3 feet. If the model is 14 inches long, what is the actual length of the car?
MatroZZZ [7]

Answer:

36" / 2.25"  * 14 = 16 * 14" = 224 inches =

18.666666 feet = 18 feet 8 inches

Step-by-step explanation:

6 0
4 years ago
Demetrious returned five library books last week, returned three books this week, then checked out 8 more books. He now has 12 l
Zanzabum

Answer:The number of books that he had before last week is 28

Step-by-step explanation:

Let x represent the number of books that he had before last week.

Demetrious returned five library books last week. This means that the number of books left is x - 5

He returned three books this week. This means that the amount of books left is x - 5 - 3 = x - 8

He then checked out 8 more books. This means that the amount of books left is x-8-8 = x - 16

He now has 12 library books. This means that

x - 16 = 12

x = 12 + 16 = 28

6 0
3 years ago
Other questions:
  • Convert 2671, to base 3 without first converting to base 10.​
    9·2 answers
  • Find the missing terms and write them in decreasing order of exponents. 21m7 − 7m5 + 49m = 7m( + + )
    7·2 answers
  • What is a equivalent ratio to 6/25?
    10·1 answer
  • Determine if the two two equations have the same solution why or why not??
    14·1 answer
  • Jeff uses three fifths size strips to model 350 wants to use 10 size strips tomorrow and equivalent fraction how many 10 size st
    13·1 answer
  • Finding the vaule of an angle ​
    5·2 answers
  • Let me know if you can see the expression if not I will just type it.​
    11·1 answer
  • jared has mowed 2/5 of the yard abby says that jason has mowed 4/6 of the yard is abby correct explain
    6·1 answer
  • Sin^2A+cos^2A=? .find the value. ​
    8·1 answer
  • SOMEONE PLZZ ILL GIVE 100 POINTS!
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!