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
Marat540 [252]
3 years ago
13

Are the following 2x2 matrices inverses or not? 1 ㅔ 1 2 & 0 1 30 2 -1

Mathematics
1 answer:
fiasKO [112]3 years ago
5 0

Answer: A . Not all 2 × 2 matrices have an inverse matrix. If the determinant of the matrix is zero, then it will not have an inverse; the matrix is then said to be singular. Only non-singular matrices have inverses.

Step-by-step explanation:

You might be interested in
What is the solution of the system? use a graph. check your answer. y=2x+4, y=x+2​
vladimir1956 [14]

Answer:

see picture with work shown

4 0
3 years ago
Help please I’m trying to do my homework and don’t understand
11Alexandr11 [23.1K]

Answer:

Answer is 9.

I think this is helpful. Vote it and like me

6 0
3 years ago
Use the distributive property to demonstrate that the product of 10 and -1/5 is a negative number. Make sure to include all step
rodikova [14]

-1(10 * (-1/5))

(-10)(1/5)

-2

4 0
3 years ago
Hi, can someone help with these two questions ASAP! (Ignore the multiple choice I circled, not sure if it’s correct)
Sindrei [870]

Answer:

1) D. y = -\frac{3}{2}\cdot x^{12} -7\cdot x^{5}+\frac{2}{3}\cdot x -10

2) E. The coefficient of x is -16.

Step-by-step explanation:

1) A polynomial is an algebraic expression of the form p(x) = \Sigma \limits_{i = 0}^{n} c_{i}\cdot x^{i}, where n is the grade of the polynomial. In this case, the only equation that satisfies this definition is:

y = -\frac{3}{2}\cdot x^{12} -7\cdot x^{5}+\frac{2}{3}\cdot x -10

Correct answer: D

2) Let p(x) = (2\cdot x + 1) \cdot (5\cdot x^{3}-8\cdot x +4), we proceed to expand the expression by algebraic means:

p(x) = (2\cdot x + 1)\cdot (5\cdot x^{3}) -(2\cdot x +1)\cdot (8\cdot x) + 4\cdot (2\cdot x + 1)

p(x) = 10\cdot x^{4}+5\cdot x^{3}-16\cdot x^{2}+4

We see that coefficients for x^{2} and x are -16 and 0, respectively. Hence, the incorrect answer is E.

3 0
3 years ago
Write an equation that represents the line. (1,-1),(3,-5)​
geniusboy [140]

Answer:

x+y=0

Step-by-step explanation:

slope m of given equations is

(-5+1)÷(3+1)

=-1

then the equations of this line is

y-(-1)=m(x-1)

or, y+1=-1(x-1)

or, y+1= -x+1

or, x+y=0

x+y=0 is required equation of line.

6 0
3 years ago
Other questions:
  • Use the formula for finding the surface area of a rectangular prism.
    9·1 answer
  • -4+6(-4x+3) please help
    10·2 answers
  • What is the integer of 3 miles below sea level
    8·1 answer
  • HELP ME PLEASEEEWWWW
    9·2 answers
  • How many meters are equal to 4 kilometers? Use the pattern in the number of zeros of the product when multiplying by a power of
    5·2 answers
  • Evaluate (3x)(5y) for x=-1, y=2
    6·2 answers
  • Find the third term in the expansion of (a+b)^9 in the simplest form
    13·1 answer
  • You want the billboard to have an area of 144 ft. 1. What do you know about the height and the width of the billboard?​
    13·1 answer
  • X3+y3+z3=k What is the answer
    11·1 answer
  • Identify the binomial<br> O A. x² - 4x + 2<br> O B.x²<br> O C.x²-4<br> O D. 2x2 + 3x -1 + y
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!