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
netineya [11]
3 years ago
13

8

Mathematics
1 answer:
almond37 [142]3 years ago
6 0

Answer:

8 i think

Step-by-step explanation:

You might be interested in
Homework: 5.1 Systems of Linear Equations
Klio2033 [76]

Answer:

\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}

x=8,\:y=5

Step-by-step explanation:

Given the system of linear equations

7x-y=51

x+3y=23

solving by the elimination method

\begin{bmatrix}7x-y=51\\ x+3y=23\end{bmatrix}

\mathrm{Multiply\:}x+3y=23\mathrm{\:by\:}7\:\mathrm{:}\:\quad \:7x+21y=161

\begin{bmatrix}7x-y=51\\ 7x+21y=161\end{bmatrix}

7x+21y=161

-

\underline{7x-y=51}

22y=110

so

\begin{bmatrix}7x-y=51\\ 22y=110\end{bmatrix}

now solving for y

22y=110

\mathrm{Divide\:both\:sides\:by\:}22

\frac{22y}{22}=\frac{110}{22}

y=5

\mathrm{For\:}7x-y=51\mathrm{\:plug\:in\:}y=5

7x-y=51

7x-5=5

7x=56

\mathrm{Divide\:both\:sides\:by\:}7

\frac{7x}{7}=\frac{56}{7}

x=8

\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}

x=8,\:y=5

7 0
3 years ago
Seperate 90 into two parts so that one part is four times the other
aalyn [17]

Answer:

18 and 72

Step-by-step explanation:

the smaller part can be assigned as x while the larger will be 4x. Both numbers need to add up to 90, giving the equation: 4x+x = 90

Solve:

4x+x = 90

5x = 90

x = 18

4x = 72

5 0
2 years ago
Simplify each expression into a single number using standard algorithms.<br> 1.-3-2
liberstina [14]

Answer:

- 5

Step-by-step explanation:

Step 1:

- 3 - 2   Equation

Step 2:

- 3 - 2  Add

Answer:

- 5

Subtracting from a negative number is the same thing as adding. If you have a negative number and you have to subtract from it. You just add both of the negative numbers together.

Hope This Helps :)

4 0
3 years ago
Help me understand this question!
Ivan

Answer:

AB = 24, BC = 6

Step-by-step explanation:

Let, the length be a and breadth be b.

So, 2(a + b) = 60  => a + b = 30

(PQR) and (ABC) are similar.

So, a/8 = b/2

     2a = 8b

     2(30 - b) = 8b

     60 - 2b = 8b

     10b = 60

     b = 6

So, a = 24

[If there's any problem with the solution, please inform me]

3 0
4 years ago
A line segment with endpoints A(-4, 3, 2) and B(5, -6, -1) is translated first two units back and 3 units right and 1 unit up th
DIA [1.3K]

Answer:

Option B. (3,-10,0) is the right answer.

Step-by-step explanation:

In these questions we should always remember x-axis represents a line in front of us, y-axis represents a line horizontally perpendicular to the line representing x-axis and Z- axis is vertically perpendicular to the x and y- axis.

So shifting front or back means it's a change on x- axis coordinates, shifting right or left means translated on y-axis and moving up and down means translated on z- axis.

Now point for B(5, -6, -1)  

x- axis -- 5 - 2 (shifted 2 units back means moved back on x-axis)

y- axis -- (-6) + 3 (shifted 3 units right means right movement on y-axis)

z-axis -- (-1) + 1 ( shifted 1 unit up means increase in z coordinate)

So the new endpoint will be B'(2, -3, 0)

Now as per question image is further translated 7 units left that means

y-axis -- -3 + (-7) (shifted 7 to the left on y axis)

Therefore new end point will be (3, -10, 0).

7 0
4 years ago
Other questions:
  • What is Y= 2x^2 + 7x + 5
    9·1 answer
  • Can someone help me please really need help​
    8·1 answer
  • A stadium has 250 people in it at noon. If 35 people per minute enter the stadium, how many are in the stadium at 1:30 p.m. when
    10·1 answer
  • 30,45,x,100; the mean is 60
    13·2 answers
  • Please show your work
    13·1 answer
  • How do you find the diameter of a circle. Or what is the diameter of 56.52
    14·1 answer
  • Would really appreciate the help!:(
    8·1 answer
  • Is this correct i am not sure
    13·2 answers
  • Find three consecutive numbers whose sum is 1020
    9·2 answers
  • The pencil is 10 cm long and the cup is 8 cm tall. Find the diameter of the base of the cup?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!