Answers
Answer:
25
Step-by-step explanation:
It is the product of the 3rd row of the first matrix with the second column of the second matrix:
(5)(8) +(-2)(6) +(1)(-3) = 40 -12 -3 = 25
Related Questions
If it takes 4 men 6 hours to repair a road, How long will it take 7 men to do the job if they work at the same rate ?
Answers
now, how long will it take for 7 men working at the same rate?, 24/7 <--- that many hours.
the division will give how long each man worked, and since it will be the same amount for each, that many hours it took for the whole job being done by the 7 of them.
[tex]\bf \cfrac{24}{7}\implies 3\frac{3}{7}\implies \textit{about 3 hours 25 minutes and 43 seconds}[/tex]
How do you solve this equation
Answers
Answer:
-4
Step-by-step explanation:
Use your knowledge of multiplication facts.
[tex]\sqrt[3]{-64}=\sqrt[3]{(-4)^3}=-4[/tex]
__
Your calculator may be able to do this for you.
Define a new random variable by y = 2px. show that, as p l 0, the mgf of y converges to that of a chi squared random variable with 2r degrees of freedom by showing that
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To show that the moment generating function (mgf) of a random variable y = 2px converges to that of a chi-squared random variable with 2r degrees of freedom as p approaches 0, we need to find the mgf of y using the definition of the mgf and substitute the new random variable. Then, by applying the limit as p approaches 0, we can demonstrate the convergence.
In this question, we are asked to define a new random variable, y = 2px, and show that as p approaches 0, the moment generating function (mgf) of y converges to that of a chi-squared random variable with 2r degrees of freedom.
To show this, we need to find the mgf of y by using the definition of the mgf and substituting the new random variable.
Then, as p approaches 0, we need to simplify the mgf and show that it converges to the mgf of a chi-squared random variable with 2r degrees of freedom.
By applying the limit as p approaches 0, we can demonstrate that the mgf of y converges to the mgf of a chi-squared random variable with 2r degrees of freedom.
[11 (y- 10)] = (4y- 5) what is y
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11y-110 = 4y -5
+110 +110
11y = 4y + 105
-4y -4y
7y = 105
y= 15
PLEASE HELP QUICK I'M OFFERING 12PTS AND BRAINLIEST ANSWER
what is the solution set for the open sentence with the given replacement set w^2 + 9 = 6w, (0,3,6,9)
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At tennis practice, Tim practices his backhand and his serve at least 2 hours each day. He works less on his backhand than his serve and practices his serve more than 1/2 hour daily.
Which system of inequalities represents Tim’s daily tennis practice if x represents the number of hours spent practicing his backhand and y represents the number of hours practicing his serve?
The images below are the possible answers,
Answers
x+y≥2
He practices his backhand(x) LESS THAN(<) his serves(y)
x<y
He practices his serves(y) MORE THAN(>) .5 hours
y>.5
Answer:
[tex]\left\{\begin{matrix}x+y\geq 2\\ x< y\\ y> \frac{1}{2}\end{matrix}\right.[/tex]
Step-by-step explanation:
Let x represents the number of hours spent practicing his backhand
Let y represents the number of hours practicing his serve.
Since we are given that Tim practices his backhand and his serve at least 2 hours each day i.e. he practices his backhand and serves for two hours or more than two hours
⇒ x+y≥2 --(a)
We are also given that He works less on his backhand than his serve
⇒x < y --(b)
And we are also given that he practices his serve more than 1/2 hour daily.
⇒ y > 1/2 --(c)
Thus the inequalities are :
[tex]\left\{\begin{matrix}x+y\geq 2\\ x< y\\ y> \frac{1}{2}\end{matrix}\right.[/tex]
Thus the Option C is correct .
Which of the following characteristics of a parallelogram leads to the conclusion that every square can always be classified as a parallelogram? Select all that apply.
four equal sides
two pair of opposite equal angles
bisecting diagonals
two pair of opposite parallel sides
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Answer:
two pair of opposite equal angles
bisecting diagonals
two pair of opposite parallel sides
does this equation describe a linear function
Y=2/x-28
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If f(x)=-2(5)^x what is f(2)
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f(2) = -2(5)²
Seth is reading a long novel. if he reads 45 pages per hour, how many hours will it take him to read 585 pages?
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This is true because:
You need to divide 585 by 45, and you get the answer, 13.
5,550 divide 10 to the power of 3
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This would be 5.55
5550÷10^3=5.55
Hope this helps
The solution involves dividing 5,550 by 1,000, which gives 5.55. The expression 10³ represents 1,000, simplifying the division. Therefore, 5,550 divided by 10 to the power of 3 equals 5.55.
To solve the problem 5,550 divided by 10 to the power of 3, follow these steps:
First, understand that 10 to the power of 3 is equivalent to 10³.Calculate 10³: 10 × 10 × 10 = 1,000. Now, divide 5,550 by 1,000: 5,550 ÷ 1,000 = 5.55.Therefore, 5,550 ÷ 10³ = 5.55.
The parent function of a graph is f(x) = x2. The graph shifts a units to the left and down b units. Which function models the transformed function?
A) y = x2 - a + b
B) y = (x - a)2 - b
C) y = (x + a)2 - b
D) y = (x - b)2 - a
B was incorrect, whats answer?
Answers
After 2 months on a diet, John’s weight dropped from 168 pounds to 147 pounds. By what percent did John’s weight drop?
Answers
Final answer:
John's weight dropped by 12.5%.
Explanation:
To calculate the percent by which John's weight dropped, we need to find the difference between his initial weight and final weight, and then divide that difference by his initial weight. We can then multiply the result by 100 to express it as a percentage.
Initial weight = 168 pounds
Final weight = 147 pounds
Difference = 168 - 147 = 21 pounds
Percent drop = (Difference / Initial weight) x 100
Percent drop = (21 / 168) x 100 = 12.5%
Therefore, John's weight dropped by 12.5%.
Final answer:
To calculate the percent by which John's weight dropped, subtract his final weight from his initial weight, and divide the difference by his initial weight, then multiply by 100. John's weight dropped by 12.5%.
Explanation:
To calculate the percent by which John's weight dropped, you need to find the difference between his initial weight and his final weight, then divide that difference by his initial weight and multiply by 100.
Difference in weight = Final weight - Initial weight = 147 - 168 = -21 Percent weight drop = (Difference in weight / Initial weight) * 100 = (-21 / 168) * 100 = -12.5%So, John's weight dropped by 12.5%.
What is the value of x?
Answers
The top of a manhole cover is shaped like a circle. The area of the manhole cover is 380 square inches. What is the circumference of the manhole cover, to the nearest inch?
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need to find the radius first
area = pi*r^2
380 = PI *r^2
380/PI = r^2
r^2 = 121
r = sqrt(121) = 11 inches
radius is 11 inches
now calculate circumference:
c = 2*PI*r
C = 2 * 3.14 * 11
circumference = 69.08 = 69 inches
How would I solve -x^2 = -36?
Answers
-x^2 = -36
Step 1: Divide both sides by -1.
-x^2/-1 = -36/-1
x^2 = 36
Step 2: Take square root.
x=±√36
x=6 or x=−6
Answer: x=6 or x=−6
I hope this helps you! :)
Find the missing measures for the rectangle.
l = _?_
w = 2 cm
A = _?_
P = 25 cm
A) 12.5 cm; 25 cm2
B) 10.5 cm; 21 cm2
C) 12.5 cm; 21 cm2
D) 10.5 cm; 25 cm2
Answers
P = 25
W = 2
25 = 2(L + 2)
25 = 2L + 4
25 - 4 = 2L
21 = 2L
21/2 = L
10.5 = L.......so ur length is 10.5 cm
A = L * W
A = 10.5 * 2
A = 21 cm^2
so ur answer is B. 10.5 cm, and 21 cm^2
write an expression for the quotient of a number and 5 decreased by 4
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let me know if you have any questions
WHO IS GOOD AT MATH!!!!! Solve this problem.
326-9²+32= ?
Answers
Please help!! Rewrite the expression as the product of two binomials. What are the two binomials for the expression? x(x-8)-9(x-8)
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what is w reduced by 22? f(w)=
Answers
So, to every w-value corresponds a value equal to w - 22.
Using the notation of functions, w is the independent variable or input and f(w) is the function that returns the dependent value or output:
inpunt otuput
w f(w) = w - 22
Answer: f(w) = w - 22
At Chelsea's workplace, 30 people drink 2 cups of coffee a day on average. A pot of coffee has 10 cups of coffee. How many pots of coffee are needed each day?
Answers
30*2=60
1 pot=10
60 divided by 10 = 6
6 pots
6 pots
6 pots
6 pots
is 3.774447444744474447444 a rational number
Answers
Show why the function f(x) = 3rad x is not differentiable at x=0
Answers
[tex]f'(x) = -\frac{3}{2\sqrt{x}}[/tex]
When x = 0, f'(0) becomes undefined. Thus, we know that there is no derivative at x = 0. You could also show it by taking the limits, which is the fundamental of calculus. Show that as x approaches 0 from the negative side is not equal to the value as x approaches 0 from the positive side.
What this tells us is that there is no uniquely distinct point that satisfies the continuity of the curve in order for the graph to have a specific gradient at x = 0; thus, this means there is no gradient at x = 0, and hence, the function is not differentiable at x = 0
At 1 P.M., there were 16 seagulls on the beach. At 3p.m., there were 40 seagulls. What is the constant rate?
Answers
24 birds in 2 hrs = 24/2 = 12 birds per hr....ur constant rate is 12 per hr
Which of the following is more than 0.35 but less than 0.41
A.
8/25
B.
3/10
C.
2/5
D.
9/26
Answers
Answer:
C. [tex]\frac{2}{5}[/tex]
Step-by-step explanation:
Let x be the number which is more than 0.35 but less than 0.41,
⇒ 0.35 < x < 0.41
[tex]\implies \frac{35}{100}< x < \frac{41}{100}[/tex]
[tex]\implies \frac{7}{20} < x < \frac{41}{100}[/tex]
∵ Only [tex]\frac{2}{5}[/tex] is between [tex]\frac{7}{20}[/tex] and [tex]\frac{41}{100}[/tex],
Hence, option C is correct.
How do you construct a line segment perpendicular to the segment given through the point given?
Answers
Billy picked 18 oranges. Taylor picked 3 times as many oranges as Billy did. They want to put them in bags with 9 oranges in each bag.
How many bags will they need for all the oranges?
Answers
54/9 = 6
So, they would need 6 bags.
If a sports car is traveling at 95 miles per hour, how long would it take the sports car to overtake a family car traveling at 35 miles per hour that left the same starting point 4.5 hours earlier?
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d = st
The sports car travels d distance for t time at speed, s, 95 mph until it overtakes the family
car.
The equation for the sports car is
d = 95t
The family car travels the same distance, d, but since it left 4.5 hours earlier than the sports car, it travels for t + 4.5 time until it is overtaken. It travels at speed, 35 mph.
The equation for the family car is
d = 35(t + 4.5)
We solve the two equations as a system of equations.
d = 95t
d = 35(t + 4.5)
Since d = d, set the right sides of the equations above equal to each other.
95t = 35(t + 4.5)
95t = 35t + 157.5
60t = 157.5
t = 2.625
The answer is 2.625 hours, or 2 hours, 37 minutes, and 30 seconds.
Check:
In 2.625 hours, the sports car travels: 95 mph * 2.625 h = 249.375 miles
The family car traveled 2.625 hours plus the extra 4.5 hours, or 7.125 hours.
In 7.125 hours, the family car travels 35 mph * 7.125 h = 249.375 miles.
The cars have traveled the same distance 2.625 hours after the sports car left, so our answer is correct.
Martene got a small aquarium for her birthday. The aquarium is a right rectangular prism 18.5cm long by 15cm wide. Martene put 3885 cm3 of water in the aquarium. How deep is the water in the aquarium -
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hope it helps