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
svp [43]
3 years ago
8

If the following system of equations was written as a matrix equation in the form AX = C,? and matrix A was expressed in the for

m, a=[a c] [b d] find the value of a - b + c + d. 5x+7y=7 3x-2y=9
Mathematics
2 answers:
Alex73 [517]3 years ago
6 0

Answer:

Answer is  a - b + c + d = 7

Step-by-step explanation:

The given equations are 5x + 7y = 7 and 3x - 2y = 9

Since system of equations are written in the form of AX = C

Now we will form the matrix form these equation.

A = \begin{bmatrix}5&7 \\ 3&-2 \end{bmatrix}

X = \begin{bmatrix}x & y \end{bmatrix}

C = \begin{bmatrix}7 & 9\end{bmatrix}

Since A = \begin{bmatrix}a & c\\ b & d\end{bmatrix}

So a = 5, b = 3, c = 7 and d = -2

Now we can find the solution of ( a - b + c + d )

a - b + c + d = 5 - 3 + 7 - 2 = 2 + 5 = 7

So the answer is a - b + c + d = 7

LenaWriter [7]3 years ago
4 0
The given equations are
5x + 7y = 7
3x - 2y = 9

As a matrix equation,
A = [5   7
       3 -2]

X = [x
        y]

C = [7
       9]
That is
a =5, c=7; and b=3, d=-2

a - b + c + d = 5 - 3 + 7 + (-2) = 7

Answer: 7
You might be interested in
How many $10 bills are the same as one $100 bill?
Anna11 [10]

Answer:

10

Step-by-step explanation:

10

4 0
2 years ago
Read 2 more answers
Use the zero product property to find the solutions to the equation 6x2 – 5x = 56.
Reika [66]

Answer:

x

=

7

2

,

−

8

3

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Show that angle a+ angle b is equal to angle d​
mr_godi [17]

sum of two angles of triangle are equal to the exterior angle of triangle

8 0
2 years ago
Read 2 more answers
A map has a 1 inch : 20 miles scale. If two cities are 1,214
storchak [24]
Its 10+20= 30 and 10++20=30
3 0
2 years ago
Please help ill mark you the brainlist The scale on a map indicates that 1 cm represents 50 km. If two cities are 400 km apart,
Andrej [43]

Answer:

8 cm

Step-by-step explanation:

divide 400 by 50 which is 8.

8 0
3 years ago
Other questions:
  • You know that 44% of a number x is 99 you also know that 22% of a number y is 55 what are the values of x and y which number is
    6·1 answer
  • Deepak randomly chooses two marbles from the bag, one at a time, and replaces the marble after each choice. What is the probabil
    11·2 answers
  • Help I​ don't​ know what to do and this is due tomorrow​
    15·2 answers
  • Find each missing measure
    5·1 answer
  • To convert 7 m/m to yards per hour around the nearest 10th
    5·1 answer
  • What is the lead coefficient of this polymomial?
    7·1 answer
  • Help this is due tomorrow but she didn’t teach us how.
    8·1 answer
  • Please help me with the question below and i will mark you as BRAINLIEST
    10·2 answers
  • What is the average miles per gallon for all new cars? Using Consumer Reports, a random sample of 35 new cars gave an average of
    6·1 answer
  • Cereal is on sale this week. Is it a better buy to get the 10-ounce box for $1.76 or the 14-ounce box for $2.42?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!