Answers
=================================
Explanation:
The result of problem 7 is undefined because the matrices are not the same size. Both matrices must have the same number of rows, and they must have the same number of columns. This is so the terms match up when we add them. This applies to question 9 as well because subtraction is a form of addition.
For problem 8, we add the corresponding terms. So for instance, along the top we have -2+(-3) = -5 as the first entry in the top row. So that's why the answer is C for problem 8. Problem 10 and 11 are similar to this. Be careful to distribute the negative through to each term in the second matrix when subtracting matrices.
For problem 12, we multiply the outer 3 by each term inside the matrix. We end up with choice B.
Related Questions
Traveling on the express train from New York to Baltimore takes approximately 2 hours and 45 minutes. The local train travels the same route from New York to Baltimore and takes approximately 3 hours and 40 minutes. Rounding to the nearest tenth, how many times as long is the journey time of the local train as the journey time of the express train?
Answers
Answer:
The local train's journey time is 1.3 times as long as the journey time of the express train.
Step-by-step explanation:
Given that:
Travelling time of express train = 2 hours and 45 minutes
We will convert this time into minutes
Travelling time of express train = 2*60 + 45 = 120+45 = 165 minutes
Travelling time of local train = 3 hours and 40 minutes = 220 minutes
Let,
n be the number of times.
Local train travelling time = Number of times * Express train travelling time
220 = n * 165
Dividing both sides by 165
[tex]\frac{220}{165}=\frac{165n}{165}\\1.3 = n[/tex]
Hence,
The local train's journey time is 1.3 times as long as the journey time of the express train.
4
5 6 7 8 9 10
11
12 13
The sum of three numbers is 56. If the second number is equal to the first diminished by 4, and the third number is 3
times the first. What are the numbers?
If x represents the first number, then which of the following equations could be used to solve the problem?
x = 3x-4
56=4x4
56=3x-4
56-5x4
a
OX
e here to search
Answers
Answer:
56-5x4
Step-by-step explanation:
The reason you want to do it that way is because they will cansle eatch other out
Amber got a raise from $100 per week to $200 per week. What is the percent increase?
Answers
its a 100% increase since the amount completely doubled
hope this helps!!
Answer:
It is a 100% increase
Step-by-step explanation:
Chad complained to his friend that he had five equations to solve for homework. Are all of the homework problems equations? Justify your answer.
Answers
Answer:
Chad's claim is incorrect
Step-by-step explanation:
The homework problems that complete the question are:
[tex]3x^2.2x^4[/tex]
[tex]5 - 2x = 3x[/tex]
[tex]3(2x + 7)[/tex]
[tex]7x^2 +2x -3x^2 -9[/tex]
[tex]\frac{2}{3} = \frac{x+2}{6}[/tex]
Required
Is Char right?
From the homework problems above, there are 5 mathematical problems
So:
Chad's claim that he had 5 equations.
A mathematical expression is an equation if it has an = sign
So for Chad's claim to be correct; at least 4 of the mathematical problems must have an = sign
By the explanation done above, we have the following observations
[tex]3x^2.2x^4[/tex] -> No Equation
[tex]5 - 2x = 3x[/tex] -> Equation
[tex]3(2x + 7)[/tex] -> No Equation
[tex]7x^2 +2x -3x^2 -9[/tex] -> No Equation
[tex]\frac{2}{3} = \frac{x+2}{6}[/tex] -> Equation
Apparently, only 2 of the 5 problems are equation.
Hence, Chad's claim is incorrect.
(04.05)Marcus painted one-third of his bedroom in fourth-fifths of an hour. At this rate, how long would it take him to paint the entire room?
five-twelfths of an hour
twelve-fifths of an hour
fifteen-fourths of an hour
four-fifteenths of an hour
Answers
that means there is still 2/3 to go
so that means that he will have two times that time to paint the rest of the room
4/5 = ?
1/3 2/3
using cross multiplication
(4/5)(2/3) = (1/3) (?)
8/15 = 1/3 ?
divide both sides by 1/3
so that will be 8/5
that means it will take 8/5 of an hour to complete the rest
= 12/5 total to do entire room
Answer:
12/5
Step-by-step explanation:
1/3 = 4/5
2/3= 8/5
3/3= 12/5
Answer quick! Will give brainliest
Answers
Answer:
Blank #1 : 2S + 4B ≥ 36
Blank #2: 1
Step-by-step explanation:
Blank#1: that is the equation
Blank#2: 8 x 4 =32 one bracelet is 4 32 + 4 =36, the amount needed
I
4)
73,693 I’m lookin to round the number
Answers
Answer:
Which place are you rounding with?
If your rounding with ones then the answer will be 73,690
If your rounding with tens then the answer will be 73,700
If your rounding with hundreds then the answer will be 73,600
If your rounding with thousands then the answer will be 74,000
There you go and your welcome!
Buddie is filing his federal income tax return with the 1040EZ form using the Single filing status, and nobody can claim him as a dependent. If he had wages, salaries, and tips of $53,100, taxable interest of $230, and no unemployment compensation, what should he enter on line 6 of the Income section below?
Answers
Answer:
Buddie
Buddie should enter on line 6 of the income section:
capital gains or losses that he incurred for the past year.
Step-by-step explanation:
Line 6 asks about the capital gains or losses from the past year so that the AGI total could be obtained before deductions are made. Where Line 6 is filled, there are some other forms that will accompany it, like Schedule D and 1099-B or 1099-S forms, which record the capital gains or losses. All capital gains that are not excludable must be stated for income tax purpose.
Answer:
$43,980
Step-by-step explanation:
Number 2 answer please
Answers
Answer:
that's the answer in pic
P/5 + 6 = 10
1. 44
2. 30
3. 20
4. -20
What one
Answers
Answer:
20
Step-by-step explanation:
P/5 + 6 = 10
P/5 = 10 - 6
P/5 = 4
(cross multiply)
P = 5 × 4
P = 20
Anyone else have a bully and your bully makes fun of you because your adopted?
I do but I tell them "Well, my parents chose me. Your parents are stuck with you"
What should I do? Should I continue roasting them or should I just go with the fact that I'm adopted?
Answers
Answer:
TBH IF YOU WANT TO ROAST I GOT NO IDEA BUT THIS IS THE THING I DO
Step-by-step explanation:
Well to be honest I think you should just treat him the same say the same things you would normallily say when you didnt know he waS
Answer:
Go back to roasting them be the cool one
Step-by-step explanation:
1) 8x + 4 + 9x + 6
O 17x + 10
27x
12x+ 15
o 178-10
Answers
Answer:
the answer is 17x+10
Step-by-step explanation:
Which statement describes the translation from the graph y=|x| to the graph y=|x+3|-4?
A) shift 3 units left and 4 units up
B) shift 3 units left and 4 units down
C) shift 4 units right and 3 units down
D) shift 3 units right and 4 units down
Answers
Answer:
B) shift 3 units left and 4 units down
The price of a pair of shoes increases from $20 to $32. What is the percent increase?
Answers
Answer:5%
Step-by-step explanation:
hope that helped
What is the rise over the run (slope) in this graph? Please write in simplest form.
Answers
Answer:
6
Step-by-step explanation: count the numbers from 26 to 32 from 32 to 38 from 38 to 44
Answer:
it would be at 5 i'm pretty sure
Mr.sampson is 12 years less than twice as old as Mr.rogers. the sum of their ages is 93. how old are they?
Answers
Answer:
Mr.Samson is 58 years old. Mr.Rogers is 35.
Step-by-step explanation
Samson's age Roger's age
2x - 12 x ( 12 years less than twice Mr.Rogers(x))
Equation: 2x - 12 + x = 93 Sum of ages is 93
3x - 12 = 93 Simplified
x = 35 Solve
Rogers = x, so Rogersis 35
But Sampson is 2x - 12 ( 2 * 35 - 12 ), so Sampson is 58
2(x+1)=10 Does anyone know what the value of x =
Answers
Answer:
2x+2=10 -2
2x=8 ÷2
x=4
Step-by-step explanation:
prove me wrong
Answer:
4
Step-by-step explanation:
2x + 2 =10
2x = 10 -2
2x =8
x = 4
A school lunch contains 12 cheese sticks. Seventy-five students buy the lunch. What is the total number of cheese sticks served?
Answers
Answer:
900 cheese sticks served (thats a lot of cheese)
Step-by-step explanation:
You can multiply to find how much in total
12*75
you’d get 900
Total number of cheese sticks served in 75 school lunches is 900.
Given that a school lunch contains 12 cheese sticks and 75 students buy the lunch,
we have to find the total number of cheese sticks served.
To find the solution,
We can use a simple multiplication formula that says,
The total number of cheese sticks served equals the number of cheese sticks in one lunch multiplied by the number of lunches served.
Therefore,
we can write,
⇒Total number of cheese sticks served = Number of cheese sticks in one lunch x Number of lunches served
As there are 75 students who buy the lunch,
We can find the number of lunches served by dividing the total number of students by the number of students in one lunch.
Since one lunch contains 12 cheese sticks, we can write,
⇒ Number of lunches served = Total number of students / Number of students in one lunch
⇒ Number of lunches served = 75 / 1
⇒ Number of lunches served = 75
Now that we know the number of lunches served,
we can use the multiplication formula to find the total number of cheese sticks served,
⇒ Total number of cheese sticks served = Number of cheese sticks in one lunch x Number of lunches served
⇒ Total number of cheese sticks served = 12 x 75
⇒ Total number of cheese sticks served = 900
Therefore,
The total number of cheese sticks served in 75 school lunches is 900.
Learn more about the multiplication visit:
https://brainly.com/question/10873737
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Which linear inequality is represented by the graph?
A) y>2/3x-2
B) y<2/3x+2
C) y>2/3x+1
D) y<2/3x-1
The answer is C
Answers
Answer:
hey you guys
Step-by-step explanation:
In a coordinate plane, draw the figures with the given vertices. Which figures are similar? Explain your reasoning. Triangle A: (0,0), (4,0), (4,2), (0,2) Triangle B: (0,0), (-6,0), (-6,3), (0,3) Triangle C: (0,0), (4,0), (4,2), (0,2)
Answers
Answer:
B
Step-by-step explanation:
The distance AB rounded to the nearest = [ ? ]
You’ll be marked as brainlest !! Help !!
Answers
The points shown on the graph are (-1,2) and (1,-2).
d = sqrt{-2-2)^2 + (1-(-1))^2}
d = sqrt{(-4)^2 + (1+1)^2}
d = sqrt{16 + 4}
d = sqrt{20}
d = 4•sqrt{5}
d is about 8.94427191.
Rounded to the nearest tenth, we get d = 8.9.
Answer:
4.5
Step-by-step explanation:
A student is attempting to factor a polynomial. Sample mathematical work is shown below. Which statement best applies to the sample mathematical work?
Given gh2 + g2h, the factors of the first term are g, h, and h2, and the factors of the second term are g, g2, and h. Thus, the greatest common factor is g. Dividing through by the greatest common factor, I get h2 + gh. Thus, the factored polynomial is g(h2 + gh).
A.
The student identified the greatest common factor incorrectly.
B.
The student incorrectly divided each term by the greatest common factor.
C.
The student failed to simplify the expression.
D.
The mathematical work shown is correct.
Answers
Answer:
Your answer is A
Step-By-Step
did it on edge
A month ago, the ratio of nurses to doctors on a hospital staff was 3:5. Since that time, two additional nurses joined the staff, no
nurses left and the number of doctors remained the same. The ratio of nurses to doctors on the hospital staff is now 4:5. How
many nurses are now on the staff?
Plz answer, I’ll givebrainliest
Answers
Answer:
8
Step-by-step explanation:
The ratio of nurses to docters a month ago was 3:5. Now, it's 4:5. You can tell that there aren't 4 nurses because 3 => 4 is only one nurse. If you duplicate both ratios (multiply both sides by 2), you get 6:10 (for a month ago) and 8:10 (now). This is correct because 6+2=8. Hope it helps!
What is the probability of not picking a red face card when you draw a card at random from a pack of 52 cards?
Answers
Answer:
3/13
Step-by-step explanation:
Answer:
13/3
Step-by-step explanation: There are 6 red face cards in all red cards
Total number of possible outcomes=26
P (red face card) =
26/6=3/13
The table shows the number of gallons of water, 9.
that a water pump transfers in s seconds. How many
gallons of water are pumped per second? What is an
equation for the gallons of water, g, that the station
can pump in s seconds?
Answers
Answer:
G = 0.75s
Step-by-step explanation:
First find the unit rate: How many gallons of water can be pumped in 1 second. This means you just have to divide by however many seconds it is being pumped. I'm using 12 and 9. 9/12 = 0.75. This means that in 1 second 0.75 or 3/4 of a gallon will be pumped. Therefore:
G = 0.75s
Sheleah and her family are planning a trip from Los Angeles, California to Melbourne, Australia. While booking her family's plane tickets, she notices on the itinerary that the airline is offering a sixteen hour straight flight from Los Angeles to Melbourne on a Boeing 747-8 Intercontinental Jet. In an effort to learn more about the capabilities of the Jet, Sheleah does a little research and stumbles upon the following graph and facts about the Jet's gasoline consumption.
The Boeing 747-8 Intercontinental Jet can carry approximately 422,000 gallons of gasoline, making it possible for the jet to travel 14,430 kilometers before needing to refuel.
Use a linear model to predict the amount of gasoline that is present on the Jet after it has been in flight for 18 hours without stopping to refuel. In two or more complete sentences, explain your answer.
Answers
The prediction of the amount of gasoline that is present on the Jet after it has been in flight for 18 hours without stopping to refuel is given as follows:
-52,750 gallons.
(as the estimate is negative, it means that the plane has to stop to refuel before that).
How to define the linear function?The linear function for this problem is defined in slope-intercept format, as follows:
y = mx + b.
The coefficients of the function are given as follows:
m is the slope, which is the gasoline spending per hour.b is the y-intercept, which is the initial amount of gasoline.The graph touches the y-axis at y = 422,000, hence the intercept b of the function is given as follows:
b = 422000.
When x = 2, y = 369250, hence the slope m is calculated as follows:
m = (369250 - 422000)/2 = -26375.
Then the linear function giving the amount of gasoline present after x hours is of:
y = -26375x + 422000.
After 18 hours, the estimate of the amount of gasoline in the tank is given as follows:
y = -26375(18) + 422000 = -52,750 gallons.
More can be learned about linear functions at https://brainly.com/question/24808124
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A linear function has an x-intercept of 12 and a slope of StartFraction 3 Over 8 EndFraction. How does this function compare to the linear function that is represented by the table?
x
y
Negative two-thirds
Negative three-fourths
Negative one-sixth
Negative StartFraction 9 Over 16 EndFraction
One-third
Negative StartFraction 3 Over 8 EndFraction
StartFraction 5 Over 6 EndFraction
Negative StartFraction 3 Over 16 EndFraction
It has the same slope and the same y-intercept.
It has the same slope and a different y-intercept.
It has the same y-intercept and a different slope.
It has a different slope and a different y-intercept
Answers
Answer:
The correct option is;
It has the same slope and a different y-intercept
Step-by-step explanation:
The data on the table can be presented as follows;
x [tex]{}[/tex] y
-2/3 [tex]{}[/tex] -3/4
-1/6 [tex]{}[/tex] -9/16
1/3 [tex]{}[/tex] -3/8
5/6 [tex]{}[/tex] -3/16
The rate of change of the function, m = (-3/16 - (-3/4))/(5/6 - (-2/3)) = 3/8
The equation of the line given by the data points in point and slope form is given as follows;
y - (-3/16) = 3/8×(x - 5/6)
y = 3·x/8 - 5/16 - 3/16 = 3·x/8 - 1/2
y = 3·x/8 - 1/2
The y intercept is given at when x = 0, therefore, at the y-intercept, y = 3 × 0/8 - 1/2 = -1/2
The y-intercept is (0, -1/2)
The x-intercept occurs at y = 0, therefore, at the x-intercept, we have;
0 = 3·x/8 - 1/2
∴ 3·x/8 = 1/2
x = 4/3
Therefore, the x-intercept is 4/3 and the coordinates of the x-intercept is (4/3, 0)
Given that the x-intercept is different, the y-intercept of the two lines with the same slope are also different
The correct option is therefore that it has the same slope and a different y-intercept;
Answer:
the answer is B
Step-by-step explanation:
Please help me with this :)
Answers
Answer: its A ........................22 +/- (3(4)/sqrt 144) = 22 +/- 1 = 21 - 23
Step-by-step explanation:
Answer:
i wanna say A srry if im wrong tho im never right
Step-by-step explanation:
ye
Help meee pleaseeeeeeeee
Answers
please help will give brainliest
Answers
Answer:
a² = 144
b² = 25
c² = 169
c = 13
Step-by-step explanation:
• a² = 12×12
= 144
• b² = 5×5
= 25
• a² + b² = c²
= 144 + 25 = 169
• c = _/169
= 13