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
Alik [6]
3 years ago
5

Help! Solve the system of linear equations by substitution. Check your solution.

Mathematics
1 answer:
Nina [5.8K]3 years ago
8 0
-2y=11-x
-7x+11-x=-13
-8x=-24
x=3
-2y=11-3
-2y=8
y=-4
You might be interested in
What is the y-intercept of the line whose equation is:
salantis [7]

Answer:

2

Step-by-step explanation:

Use the intercept method.  Where is y when x = 0?

3 0
3 years ago
How much can 18 go to 80
Luda [366]
80÷18≈4
18 can go into 80 four times

Hope my answer helped u :)
3 0
3 years ago
Read 2 more answers
In a particular large Midwest city, a simple random sample of 400 people reveals that 128 of them know how to ski. 1. A 99.8% co
allsm [11]

Answer

The answer and procedures of the exercise are attached in the following archives.

Step-by-step explanation:

You will find the procedures, formulas or necessary explanations in the archive attached below. If you have any question ask and I will aclare your doubts kindly.  

5 0
3 years ago
Read 2 more answers
Simplify:<br><br><br>4(r + 1) + 3r<br><br> A. 4r + 4<br> B. 5r + 1<br> C. 7r + 1<br> D. 7r + 4
klasskru [66]

Answer:

look in the explanation, it is in there

Step-by-step explanation:

i don't know if you are distributing or just using PEMDAS .

if you are distributing then: do in the equation 4(r + 1) + 3r.. do 4 x r and 4 x 1 , now you have 4r + 4 + 3r

                        7r +4

                      is what i got!

If you are doing PEMDAS then: first you do what is inside the perenthisis ()

4(r + 1) +3r changes into

4( r1 ) + 3r now you do multipulcation because that in the "M" in pemdas

4r + 3r, then if you are using like terms you would add them

7r

i hope this helps you out!

6 0
3 years ago
Read 2 more answers
Determine weather the statement is true or false. Justify your answer
topjm [15]
\begin{gathered} \cos (-\frac{7\pi}{2})=\cos (\pi+\frac{\pi}{2}) \\ \cos (-\frac{7\pi}{2})=\cos (\frac{3\pi}{2}) \end{gathered}

As we know:

\begin{gathered} \cos (x)=0 \\ for \\ x=\pi n-\frac{\pi}{2} \\ n\in Z \end{gathered}

For:

\begin{gathered} n=2 \\ x=2\pi-\frac{\pi}{2}=\frac{3\pi}{2} \\ for \\ n=-3 \\ x=-3\pi-\frac{\pi}{2}=-\frac{7\pi}{2} \end{gathered}

Therefore:

\begin{gathered} \cos (-\frac{7\pi}{2})=0 \\ and \\ \cos (\frac{3\pi}{2})=0 \\ so\colon \\ 0=0 \\ This_{\text{ }}is_{\text{ }}true \end{gathered}

Therefore, the statement is true

7 0
1 year ago
Other questions:
  • The length of a kitchen wall is 24 2/3 feet long . a border will be placed along the wall of kitchen. if the border comes in str
    11·2 answers
  • The measure of an angle is six more than twice the measure of its
    14·1 answer
  • If movie tickets were $5.50 for a child’s ticket and $9.20 for an adult ticket, if 149 tickets were sold, with a total of $1137.
    5·1 answer
  • A group of 200 workers 15 are chosen to participate in a survey about the number of Miles they drive to work each week
    8·1 answer
  • Does anyone know how to work this out?
    10·2 answers
  • I really need help with the math. If you are good could you help?
    14·1 answer
  • Can someone help fast​
    8·2 answers
  • There are 47 tables of 4 and 16 tables of 5 how many customers are in the restaurant
    5·1 answer
  • The mean of birth weights for individual babies in the population is 3,500 grams. What is the mean birth weight for the sampling
    11·1 answer
  • Use an area model to find 1/2 of 3/4 please someone quick!
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!