If the following system of equations was written as a matrix equation in the form AX = C, and matrix A was expressed in the form: A= {A C} {B D}, find the value of a-b +c+d. 2x+8y=7 4x-2y=9 Please help, i dont know which number would be which letters
Answer: a-b+c+d =4
Step-by-step explanation:
The given system of equation is
[tex]2x+8y=7\\4x-2y=9[/tex]
from this we have the following matrices
[tex]A_1 =\begin{bmatrix}\\2 &8 \\ \\4&2 \\\end{bmatrix}\ ,X=\begin{bmatrix}\\x\\ \\y\\\end{bmatrix}\text{and}\ C=\begin{bmatrix}\\7\\ \\9\\\end{bmatrix}[/tex]
the given matrix A =[tex]\begin{bmatrix}\\a &c \\ \\b &d \\\end{bmatrix}[/tex]
On comparing Matrix [tex]A_1[/tex] with Matrix A
[tex]\begin{bmatrix}\\a &c \\ \\b &d \\\end{bmatrix}=\begin{bmatrix}\\2&8 \\ \\4 &-2 \\\end{bmatrix}[/tex]
we have the following values
a=2 ,b=4,c=8,d=-2
Thus a-b+c+d =2-4+8+(-2)=4
If you know out of 140 pounds, 60 pounds is muscle weight, what is the muscle weight of a 200 pound male?
Ethel is arranging rides so that 27 members go bowling. Some people can ride in a van that belonges to the center where they meet the rest must ride in cars if 12 can go in the van and 5 can go in each car how many cars will they need?
Answer:
Number of cars needed=3
Step-by-step explanation:
Ethel is arranging rides for 27 members.
If 12 can go in the van and 5 can go in each car.
Let c cars are needed
Then, 12+5c=27
5c=27-12
5c= 15
c= 15/5
c=3
Hence, number of cars needed equals:
3
In an inductive generalization, in order to achieve an error margin of plus or minus 3 percentage points at a confidence level of about 95 percent, whats the smallest random sample we can get away with, regardless of the size of the target population
If you have 18 out of 20 homework sections completed what percentage do you have
After 5 years of earning interest at an annual rate of 3% an investment has earned $950 in interest. To the nearest whole dollar, determine the amount of the initial investment
The total cost to rent a row boat is $14 times the number of hours the boat is used. Write an equation to model this situation if c = total cost and h = number of hours.
c = 14h
this would give you the total cost by multiplying 14 by the number of hours
Find the Taylor series for
f(x), centered at the given value of a.
f(x) = sin(x), a = π
Written as a summation?
Radius of convergence?
The Taylor series for [tex]\( \sin(x) \)[/tex] centered at [tex]\( a = \pi \)[/tex] is:[tex]\[ \sin(x) = \sum_{n=0}^{\infty} \frac{(-1)^n}{(2n + 1)!}(x - \pi)^{2n + 1} \][/tex]
The radius of convergence of this Taylor series is infinite, meaning it converges for all values of ( x ).
To find the Taylor series for [tex]\( f(x) = \sin(x) \)[/tex] centered at [tex]\( a = \pi \),[/tex] we first need to find the derivatives of \( \sin(x) \) and evaluate them at \( x = \pi \). Then, we'll write out the Taylor series using the formula:
[tex]\[ f(x) = f(a) + f'(a)(x - a) + \frac{f''(a)}{2!}(x - a)^2 + \frac{f'''(a)}{3!}(x - a)^3 + \cdots \][/tex]
Let's find the derivatives of [tex]\( \sin(x) \)[/tex] and evaluate them at [tex]\( x = \pi \):[/tex]
1. [tex]\( f(x) = \sin(x) \)[/tex]
2. [tex]\( f' (x) = \cos(x) \)[/tex]
3.[tex]\( f''(x) = -\sin(x) \)[/tex]
4.[tex]\( f'''(x) = -\cos(x) \)[/tex]
Now, evaluate these derivatives at \( x = \pi \):
1. [tex]\( f(\pi) = \sin(\pi) = 0 \)[/tex]
2. [tex]\( f'(\pi) = \cos(\pi) = -1 \)[/tex]
3.[tex]\( f''(\pi) = -\sin(\pi) = 0 \)[/tex]
4. [tex]\( f'''(\pi) = -\cos(\pi) = 1 \)[/tex]
Now, plug these values into the Taylor series formula:
[tex]\[ \sin(x) = 0 - 1(x - \pi) + \frac{0}{2!}(x - \pi)^2 + \frac{1}{3!}(x - \pi)^3 + \cdots \][/tex]
Simplify:
[tex]\[ \sin(x) = -\sum_{n=0}^{\infty} \frac{(-1)^n}{(2n + 1)!}(x - \pi)^{2n + 1} \][/tex]
So, the Taylor series for [tex]\( \sin(x) \)[/tex] centered at [tex]\( a = \pi \)[/tex] is:
[tex]\[ \sin(x) = \sum_{n=0}^{\infty} \frac{(-1)^n}{(2n + 1)!}(x - \pi)^{2n + 1} \][/tex]
The radius of convergence of this Taylor series is infinite, meaning it converges for all values of ( x ).
The sum of two #'s is 29. The sum of the smaller and 2 times the larger is 45. Find the #'s.
x+y=29
y=29-x
x+2y=45
x+2(29-x)=45
x+58-2x=45
-1x=-13
x=13
y=29-13=16
x+y = 13+16 = 29
x+2y= 13 + 2(16) = 13+32 = 45
so the numbers are 13 & 16
Four students did a survey to find the soda flavor sixth-grade students perefer. The table below shows the method each student used to conduct the survey:
Student. Method
Trey- asked 100 students at random from his seventh- grade class what their favorite soda flavor is
Jesse- asked 100 sixth-grade students at random what their favorite soda flavor is
Nita-asked 100 eighth-grade students at random what their favorite soda flavor is
Ruben- asked 100 third- grade students at random what their favorite soda flavor is
Which students survey is most likely not biased?
Trey
Jesse
Nita
Ruben
The average national basketball association player is over 6 feet tall. the average horse jockey is shorter than 5 1/2 feet tall. this is because height provides nba players with:
Final answer:
Height is crucial for NBA players due to its impact on their performance. Z-scores help compare player heights to the average. Taller stature offers basketball players notable advantages.
Explanation:
Height is a critical factor for NBA players as it can significantly impact their performance, especially in areas like rebounding, shot-blocking, and scoring.
Z-score calculations help determine how a player's height compares to the average, with values above the mean indicating taller heights, which are advantageous in basketball.
Being taller provides NBA players with advantages in terms of reaching high for shots, blocking opponents, and having a better field of vision on the court.
A drawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. What is the least number of socks you must choose, without looking, to be certain that you have chosen two brown socks?
The only time you can be so certain that you have picked 2 brown socks is when there are no more white socks and black socks. This means that to be 100% sure that you have picked 2 brown socks, you must pick all 12 white socks and all 18 black socks and only then you can pick 2 brown socks without looking. Therefore the total number of socks that should be picked is:
Total number of socks = 12 white socks + 18 black socks + 2 brown socks
Total number of socks = 32 socks
A total picking of 32 socks is required to be certain without looking that 2 brown have already been chosen.
What is 40 kilometers per hour in meters per hour
pie =????????????????????.??
A trucker had a load of grain containing 2 tons. She unloaded 1 ton 1,200 pounds at the warehouse. How much grain does she still have left on the truck?
The average yearly temperature T in degrees for Newport, Oregon is given by: |T−55|≤10 Find the average temperature range in degrees.
The average temperature range in Newport, Oregon is between 45 and 65 degrees.
The average yearly temperature T in degrees for Newport, Oregon is given by: |T−55|≤10. This means that the temperature T is within 10 degrees of 55 degrees. To find the average temperature range, we consider the range between 55+10 = 65 degrees and 55-10 = 45 degrees.
Therefore, the average temperature range in Newport, Oregon is 45 to 65 degrees.
What is 46 2/3% of 28
Answer:
46 2/3% of 28 is 13.06
Step-by-step explanation:
Hello,
thank you very much for asking this here in brainly, I think I can help you with this one
Let's remember
[tex]a\frac{b}{c} =\frac{(a*c)+b}{c}\\[/tex]
Step 1
[tex]46\frac{2}{3} =\frac{(46*3)+2}{3} =\frac{140}{3} =46.67[/tex]
so 46 2/3% =46.67%
Step 2
using a rule of three
define the relationships
if
28⇒ 100%
x? ⇒46.67%
[tex]\frac{28}{100}=\frac{x}{46.67} \\[/tex]
isolating x
[tex]\frac{28}{100}=\frac{x}{46.67} \\x=\frac{28*46.67}{100}\\x=\frac{1306.67}{100} \\x=13.06[/tex]
46 2/3% of 28 is 13.06
I hope it helps, have a great day
9.8 is 2% of what number
The vertex angle of an isosceles triangle measures 40°. What is the measure of a base angle?
a full-time employee who works 40 hours per week earns 29.85 per hour estimate the person's annual income
Tom predicted that the Giants would score three 3-point field goals, score two 6-point touchdowns, and score 1 extra point. If Tom were correct, what would the Giants' score be at the end of the game?
3x3 = 9
2x6 = 12
12+9 = 21+1 =22
score would be 22 points
Answer:
The Giants' score will be 22 points.
Step-by-step explanation:
Consider the provided information.
It is given that tom predicted that the Giants would score three 3-point field goals. Which can be written as:
3 × 3 = 9
Total score by field goals is 9 points.
If he score two 6-point touchdowns, this can be written as:
2 × 6 = 12
Total score by touchdown is 6 points.
And 1 extra point.
Now add all the points as shown below:
Total score is: 9 + 12 + 1 = 22 points
Hence, the Giants' score will be 22 points.
Triangle xyz has sidesxy equals 3 yz equals 4 and xz equals 5.if angle y is a right angle and yz is opposite angle x what is the tan of angle x
p=m/1+rt solve for t
tan 2θ; cos θ = 8 17 , θ in Quadrant I
We first found sin θ using the Pythagorean identity, then found tan θ, and finally used the double-angle formula for tan to find tan 2θ.
Explanation:To find the value of tan 2θ when cos θ = 8/17 and θ is in Quadrant I, you need first to find the value of sin θ. Since we are in Quadrant I, both cos and sin are positive. You can use the Pythagorean Identity for sin, cos, and tan, which states sin² θ + cos² θ = 1, to find sin θ. Substituting the given value of cos θ in this identity, we can find that sin θ = sqrt(1 - (8/17)²) = 15/17.
With sin and cos known, we can now find tan θ using the formula tan θ = sin θ/cos θ which gives tan θ = (15/17)/(8/17) = 15/8.
Finally, to find tan 2θ, use the Double-Angle formula for the tangent, which states tan 2θ = 2 tan θ / (1 - tan² θ). Substituting tan θ = 15/8 into this formula, we get tan 2θ = 2 * (15/8) / (1 - (15/8)²).
Learn more about Trigonometric values here:https://brainly.com/question/29069676
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To find tan 2θ, given cos θ is 8/17 and θ is in the first quadrant, first find sin θ using the Pythagorean identity, then use the double-angle formula where tan 2θ equals 2 tan θ divided by 1 minus tan squared θ, yielding -2.
To find tan 2θ given that cos θ is 8/17 and θ is in the first quadrant, we first need to find the value of sin θ. Since θ is in the first quadrant, all trigonometric functions are positive. Using the Pythagorean identity, we have:
sin θ = √(1 - cos² θ)
Substituting cos θ = 8/17:
sin θ = √(1 - (8/17)²) = √(1 - 64/289) = √(225/289) = 15/17.
Next, we use the double-angle formula for tangent:
tan 2θ = (2 tan θ) / (1 - tan² θ)
To find tan θ, we use:
tan θ = sin θ / cos θ = (15/17) / (8/17) = 15/8
Now, substitute tan θ into the double-angle formula:
tan 2θ = (2 × 15/8) / (1 - (15/8)²)
= (30/8) / (1 - 225/64)
= (30/8) / (-161/64) = -1920/1288 = -15/7.5 = -2
The complete question is :
Given that [tex]\(\cos \theta = \frac{8}{17}\)[/tex] with [tex]\(\theta\)[/tex] in the first quadrant, determine [tex]\(\tan 2\theta\).[/tex]
Jonathan's Antiques purchased an old wooden sled at an auction for $210. Jonathan wants to mark up the sled 60% of the selling price. What would be the selling price of the sled?
How much times does 7 go into 48??
Erika worked 14 hours last week and 20 hours this week. If she earns $9 per hour, how much did she earn during these two weeks? 4 of 60
we know that
Erika earns [tex]\$9[/tex] per hour
so
By proportion
Find how much she earn during the total hours of two weeks
The total hours of two weeks is equal to
[tex]14+20=34\ hours[/tex]
[tex]\frac{9}{1} \frac{\$}{hour} =\frac{x}{34} \frac{\$}{hours} \\ \\x=34*9 \\ \\x=\$306[/tex]
therefore
the answer is
[tex]\$306[/tex]
Tony plans to deposit $1,000 at the end of each of the next three years. if his funds earn 5% compounded annually, how much will he have at the end of three years?
Final answer:
Tony will have a total of $3,152.50 after depositing $1,000 annually for three years in an account with 5% interest compounded annually, by calculating the future value of each deposit and summing them up.
Explanation:
When Tony deposits $1,000 at the end of each year into an account that earns 5% interest compounded annually for three years, we need to calculate the future value of an annuity. Each deposit will earn interest for a different amount of time based on when it was deposited.
The first $1,000 will earn interest for two years.
The second $1,000 will earn interest for one year.
The third $1,000 will not earn interest, as it is deposited at the end of the third year.
The formula to calculate the future value of each deposit is:
Future Value = Principal × [tex](1 + Interest rate)^{number of years}[/tex]
Calculating each separately:
First deposit: $1,000 × [tex](1 + 0.05)^2[/tex] = $1,102.50
Second deposit: $1,000 × [tex](1 + 0.05)^1[/tex] = $1,050.00
Third deposit: $1,000 × [tex](1 + 0.05)^0[/tex] = $1,000 (as it earns no interest)
Adding them together gives us the total amount Tony will have at the end of three years:
Total amount = $1,102.50 + $1,050.00 + $1,000 = $3,152.50.
Therefore, at the end of three years, Tony will have $3,152.50 in his account.
Find the dimensions of the rectangular box with largest volume if the total surface area is given as 64cm^2
91284 the nearest ten thousand