B = A–1, then A = B–1. This statement is true. The inverse of a matrix is unique, so if B is the inverse of A, then A must be the inverse of B.
what is matrix ?An arrangement of integers in both columns and rows is known as a matrix. learns about matrices' components and dimensions and first presents them. A matrix is a rectangular grid with integers arranged in rows and columns.
The statements that are true about inverse matrices are:
Not all square matrices have inverses. A square matrix only has an inverse if its determinant is not equal to zero. If the determinant of a square matrix is zero, it is called a singular matrix and does not have an inverse.
If A and B are inverse matrices, then A and B must be square matrices. This is because only square matrices can have inverses.
The determinant of a singular matrix is equal to zero. This is because the determinant of a matrix is related to the linear independence of its columns or rows. A singular matrix has linearly dependent columns or rows, which means its determinant is zero.
If A and B are inverse matrices, then A + B = I. This is not necessarily true. In general, the sum of two inverse matrices is not necessarily the identity matrix.
If A and B are inverse matrices, then det(A) x det(B) = 1. This statement is almost true, but the correct statement is det(A) x det(B) = det(AB) = 1.
Any zero matrix does not have an inverse. This is because the determinant of a zero matrix is zero, and therefore it is singular and does not have an inverse.
If B = A–1, then A = B–1. This statement is true. The inverse of a matrix is unique, so if B is the inverse of A, then A must be the inverse of B.
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Answer: B,C,E,F,G
Step-by-step explanation:
Can someone write logb(xy) as two logs (49 points)
Answer:
log b (xy) = log b (x) + log b (y)Step-by-step explanation:
Log of the product is equal to the sum of the logs
log b (xy) = log b (x) + log b (y)Enter the value of n for the equation 26 * 2n = 213
Answer:
4.09
Step-by-step explanation:
The following graph shows the sales records of four employees over a period of six months.
A graph titled Sales has month on the x-axis and sales (dollars times 1,000) on the y-axis. Mary: Starts at 6.4 and ends at 8.6. Lewis: starts at 5.5 and ends at 6.9. Todd: Starts at 4.6 and ends at 3.3. Paige: Starts at 7.1 and ends at 7.1.
Which employee experienced the single greatest decline in sales between two months?
a.
Mary
b.
Lewis
c.
Todd
d.
Paige
Answer: D Paige
Step-by-step explanation:
Took the test
The employee who experienced the single greatest decline in sales between two months is Paige.
How to find the function which was used to make graph?There are many tools we can use to find the information of the relation which was used to form the graph.
A graph contains data of which input maps to which output.
Analysis of this leads to the relations which were used to make it.
A graph titled Sales has a month on the x-axis and sales (dollars times 1,000) on the y-axis.
Mary: Starts at 6.4 and ends at 8.6.
Lewis starts at 5.5 and ends at 6.9.
Todd: Starts at 4.6 and ends at 3.3.
Paige: Starts at 7.1 and ends at 7.1.
The difference between the start sales and end sales represents the greatest decline.
Here, Paige has the least difference.
The employee who experienced the single greatest decline in sales between two months is Paige.
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Solve the system of equations -4x-2y=30−4x−2y=30 and -x+y=6−x+y=6 by combining the equations.elimination
Answer:
215.00
Step-by-step explanation:
I am struggling with math right now this will help out a lot
Answer:
A car bought every 10 seconds? If that is even true
Step-by-step explanation:
please help me on this will give you brainliest
Answer:
x + 8*19
Step-by-step explanation:
Here is an isosceles triangle.
Diagram NOT
accurately drawn
18 cm
18 cm
14 cm
Work out the area of the triangle.
Give your answer correct to 3 significant figures.
(4 marks)
A≈116.06, the area of the triangle.
What is area of isosceles triangle?In geometry, an isosceles triangle is a triangle that has two sides of equal length. Sometimes it is specified as having exactly two sides of equal length, and sometimes as having at least two sides of equal length, the latter version thus including the equilateral triangle as a special case.
Area: ½ × base × height
here, we have,
the side= 18, 18
base = 14
here, it is a isosceles triangle.
So, using the formula ,
we get,
area= 116.06
hence, A≈116.06, the area of the triangle.
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Eliza cannot decide which of two bicycles to buy. The original price of each is $380. The first is marked down by 50%. The second is marked down by 30% with an additional 20% off. Part A: Find the sale price of each bicycle. Part B: Which bicycle should Eliza buy if the bicycles are the same except for the selling price?
Answer:
First Bike = $190 Second Bike = $212.80
Eliza should buy the first bike
Step-by-step explanation:
PLS HELP ME ASAP I DONT HAVE TIME. IT ALSO DETECTS IF ITs RIGHT OR WRONG.
Answer:gay
Step-by-step explanation:
Answer:
k=4.5
Step-by-step explanation:
if you multiply 4.5 by x your result will be y
ex: 4x4.5=18
4=x and 18=y
Determine the solutions to the following equation.
(x - 4)^2 = 81
A) x = -5 and 13
B) x = -4 and 9
C) x = -13 and 5
D) x = -9 and 4
Answer:
A- -5 and 13
Use the graph of quadrilateral ABCD to answer the question.
Answer:
did anyone answer?
Step-by-step explanation:
Describe how each graph is obtained from the graph of y= f(x).
(a) y = f(x – 2)
Can somebody help telling what does it mean? what does it want us to do?
Answer:
see explanation
Step-by-step explanation:
Give the graph of y = f(x) then y = f(x + a) represents a horizontal translation of y = f(x)
• If x > 0 then a shift to the left of a units
• If x < 0 then a shift to the right of a units
Thus
y = f(x - 2) is the graph of y = f(x) translated 2 units right
Which of the following lists of numbers is closed under division?
O Rational Numbers
O Whole Numbers
O Natural Numbers
O Irrational Numbers
Answer:
The set of rational numbers is closed under addition, subtraction, multiplication, and division (division by zero is not defined) because if you complete any of these operations on rational numbers, the solution is always a rational number
Step-by-step explanation:
Rational Numbers closed under division
What are rational numbers?Rational Numbers: Any number that can be written as a ratio (or fraction) of two integers is a rational number.
Given:
we have to find the Numbers closed under division
Whole numbers are not closed under division because denominator can't be equal to 0.
Similarly, Natural Numbers and Irrational Numbers are not closed under division.
Since the result of any of these operations on rational numbers is always a rational number, the set of rational numbers is closed under addition, subtraction, multiplication, and division (division by zero is not defined).
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1st one to answer will be marked as brainliest
1+1=
1-1=
I get a 15% discount at Ann Taylor Loft. If I find a shirt I like for $20, how much will I have to pay for it?
Please help it due asap
Helppppppp
Answer:
x = 30°
2x = 60°
3x = 90°
Step-by-step explanation:
GBF = CBD (opposite angle)
; 2x+x+3x = 180° (Size of straight angle)
6x = 180
x = 180÷6
x = 30°
substitution x in 2x ; 2×30 = 60°
substitution x in 3x ; 3×30 = 90°
hope it helps ☺️
The restaurant had 140 quarts of olive oil. If they used 60% of this amount, how many quarts would they use?
Use: 60% x 140
1Points
A
100 quarts
B
84 quarts
C
56 quarts
D
112 quarts
Answer:
84 quarts
Step-by-step explanation:
60% can be turned to 0.6
140 x 0.6 = 84
i need help asap!!!!!!!!!!!!!!! 7th grade math
Answer:
1) 11 = c
2) 11 = p
3) 4 = -k
Step-by-step explanation:
I will not help you with every question, but I will help you with a few and explain the process so you can understand.
1 ) 15 = c + 4
11 = c
## Subtraction Property Of Equality (Subtract 4 from both sides)
2) 7 = p - 4
11 = p
## Addition Property Of Equality (Add 4 to both sides)
3) -2 = -k/2
4 = -k
## Multiplication Property Of Equality (Multiply both sides by -2)
2. In a bazaar, different items were on sale for big discounts. Irene was
looking for a school bag. She visited three stalls to buy one for his
younger brother. The stall offered the school bag of the same quality but
differed in price. The first stall offered it for P 749. 25, the second stall
for P 792.45 and the third stall for P 724. 95. If she wanted to save, from
which stall would she buy the school bag?
Answer:
yes
Step-by-step explanation:
yes
WILL GIVE BRAINLIEST IF RIGHT
The graph below shows the relationship between the number of miles traveled and the time.
Which statement about the unit rate of the graph is true?
A. The unit rate is 1.
B. The unit rate is 30.
C. The unit rate is 1/12.
D. The unit rate is 12.
Answer:
I think c
Step-by-step explanation:
When y=1 x=12
Answer: The unit rate is 1/12
Step-by-step explanation:
Given m ||n, find the value of x.
(7X+9)
(9x+5)°
Answer:
x = 2Step-by-step explanation:
(7x + 9)° is corresponding angle to (9x + 5)° angle
Therefore:
m║n ⇒ (7x + 9)° = (9x + 5)°
(7x)° + 9° = (9x)° + 5° {subtract (7x)° from both sides}
9° = (2x)° + 5° {subtract 5° from both sides}
4° = (2x)° {divide both sides by 2°}
x = 2
Find the area of the figure with Heron’s formula
Answer:
735 cm²
Step-by-step explanation:
The figure is a trapezium .The area of the triangle section can be calculated using the Heron's formula.
The other part of the figure will be a square of sides 21 cm by 21 cm
Area of the square section
Area = l²
Area = 21* 21 = 441 cm²
Area of the triangle using Heron's formula
Sides of the triangle are ;
a= 28 cm
c= 35 cm
b = 21 cm -----height of the trapezium
The Heron's formula is given as;
[tex]A=\sqrt{s( s-a)(s-b )(s-c )}[/tex]
where s is half the perimeter of the triangle
Perimeter of the triangle is given as ;
P= 35 + 28 + 21 =84 cm
s= 84/2 = 42 cm
[tex]A=\sqrt{42*(42-21 )*(42-35 )*(42-28 )} \\\\A=\sqrt{42*(21 )*(7 )*( 14)} \\\\A=\sqrt{86436} \\\\A=294\\\\[/tex]
Total area = 294 + 441 = 735 cm²
Which of the following is a true statement about the angles in the
figure below?
22
21
24
43°
56
23
them is 99
Answer:
6ix9ine..69. ..
Step-by-step explanation:
m...vgcty
At Target you can buy 45 oz. of Sprite for
$2.79, and at Walmart you can buy 65 oz.
of Sprite for $2.75. Compute which
option is the better buy and by how
much.
Answer:
walmart
Step-by-step explanation:
Please help me if u give me an answer could u also give me an explanation on why that’s the answer.
find missing side length
Answer:
it would be 10. Since the other is 3 3 5, this would be 6 6 10.
Find the difference: (11x2+2x+16) – (2x2+x+2)
Answer:
im a little confused so i hope this is right
Step-by-step explanation
(11*2+2x+16)= 38+2x
(2*2+x+2)= 6+x
38+2x-6+x= 32+x ??
38-6=32
2x-x= x or 2x+x=3x
X Y Whats the slope
0 0
3 1
12 4
21 7
Answer:
1/3
Step-by-step explanation:
Eli is following this recipe to bake bread rolls.
He uses 400 mL of water.
How much of the other ingredients does he use?
Recipe: Makes 12 bread rolls
480 g flour
12 g salt
9 g yeast
45 mL oil
300 ml water
Answer:
640g flour
16g salt
12g yeast
60ml oil
Step-by-step explanation:
300 x (4/3) = 400
so multiply all by 4/3
What is the y-intercept of the following equation?
y=x2-3x-4
Answer:
y- intercept is ( 0, -4 )
Step-by-step explanation: