Consider the system of linear equations and the matrix equations below.
- X+ 3y = 2
4x - 2y = 22
-1
3
Х
2
4
-2
22
What is the value of x in the equation?
-36
3
7
64

Answers

Answer 1

9514 1404 393

Answer:

  x = 7

Step-by-step explanation:

Using Cramer's rule, the value of x is ...

  [tex]x=\dfrac{\left|\begin{array}{cc}2&3\\22&-2\end{array}\right|}{\left|\begin{array}{cc}-1&3\\4&-2\end{array}\right|}[/tex]

  x = ((2)(-2) -(22)(3))/((-1)(-2) -(4)(3)) = (-4-66)/(2-12) = -70/-10

  x = 7


Related Questions

What is the range of 5,4,6,3,4?

Answers

Answer:

Range=2

Step-by-step explanation:

Range=Highest number-Lowest number

          =5-3=2

Hope it Help

Mark Me Brillainest

HELP ME PLEASE EDCITE !!!!

Answers

Answer:

I might be in highschool, but I'm sure I can still help.

Step-by-step explanation:

See the 45 degree angles? that means they're equal sides. So 4v2 = 5.65, right? so if you take 180 - 5.65, and then divide by two, you should have the length to each of those sides. They're equal, remember. So, the answer would be 180 - 5.65 = 174.35. 174.35 / 2 = 87.175. In this case, k = 87.175 :)

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Topic: Profit and Loss
Ex: 7a, page no. 92
cost price
12
Q1. A man purchased a dozen pens for Rs 25 each and sold them at Rs 28
each. Find the total profit as well as the profit per cent on the transaction.
Ans. Solution:​

Answers

Answer:

RS 36

12%

Step-by-step explanation:

Profit = total selling price - cost price

(28 - 25) x 12 = 36

Percentage profit = (profit / cost price) x 100

Cost price = 25 x 12 = 300

(36/300) x 100 = 12%

Please answer someone!!!

Answers

Answer:

True

Step-by-step explanation:

[tex]\sqrt{(xy)^3}[/tex] = [tex]((xy)^{1/2})^3[/tex] =[tex](xy)^{{1/2}*3}[/tex] =[tex](xy)^{3/2}[/tex]

The answer is TRUE

√(XY)³(xy)^{3×1/2}xy^{3/2}

True

1
In a circle, the coordinates of the endpoints of
a diameter are (4,5) and (10,1). What are the
coordinates of the center of the circle?

Answers

Answer: (7,3)

Step-by-step explanation:

Find the midpoint of the diameter to find the center

mid-point formula

[tex](\frac{(x_{1} +x_{2)} }{2} ,\frac{(y_{1} +y_{2} )}{2} )[/tex]

Using points (4,5) and (10,1)

[tex](\frac{4+10}{2} , (\frac{5+1}{2} )\\(\frac{14}{2},\frac{6}{2}) \\\\(7,3)[/tex]

The coordinates of the center of the circle are (7, 3).

Given that, in a circle, the coordinates of the endpoints of a diameter are (4,5) and (10,1).

What is the midpoint of a line segment?

A midpoint of a line segment is the point on a segment that bisects the segment into two congruent segments.

The formula to find the midpoint of line segment is (x, y) = [(x1+x2)/2, (y1+y2)/2]

The center of the circle is midpoint of a diameter

Here, (x, y) = ((4+10)/2, (5+1)/2)

= (14/2, 6/2)

= (7, 3)

Therefore, the coordinates of the center of the circle are (7, 3).

To learn more about the formula of midpoint visit:

https://brainly.com/question/4728902.

#SPJ2

WILLL MARK BRAINLIEST IF GOTTEN RIGHT

Answers

Sorry for the changing answers, did the question too fast and misinterperted the diagram. The answer below is the correct one.

Answer:

mUC=70°

Step-by-step explanation:

The angle (87) formed by two chords (US and TS) is half the sum of the intercepted arcs(104 and mUC):

87=(1/2)(104+mUC)

174=104+mUC

mUC=70°

Please help I'll mark you as brainiest

Answers

The answer is going to be B

10% of $200,000 = $20,000

The answer is B
200000(10%)= 20,000

what is the area of the donut pictured below? use 3.24 for pi

Answers

C (235.5mm^2) is the answer

MAX POINTS PLEASE HELp
part a. What are the values of x and y? If your answer is not a whole number, write it as a decimal and round to one decimal place if necessary.
part b:
Here is a triangular prism.


What is the volume of the prism, in cubic centimeters?

cubic centimeters

What is the surface area of the prism, in square centimeters?
cubic centimeters

Answers

Answer:

X=35 Y=73

Step-by-step explanation:

use the opposite angle theorem for x. X would equal 35.

we know that x is 35. So 2y+35=180

180-35=2y

y=72.5 or 73

srry I can’t help with question 2. I don’t know how

Condense the logarithm

q log b + 3 log k

Answers

Answer:

a

Step-by-step explanation:

Answer:

[tex]log(\frac{a^{2} }{b^{3} } )[/tex]

Step-by-step explanation:

[tex]q[/tex] [tex]log[/tex] [tex]a -3log[/tex] [tex]b[/tex]

[tex]=log[/tex] [tex]a^{2} -log[/tex] [tex]b^{2}[/tex]

[tex]now[log[/tex][tex]a/b=log[/tex] [tex]a-log[/tex] [tex]b[/tex][tex]][/tex]

[tex]= log(a^{2} /b^{3)}[/tex]

[tex]--------[/tex]

hope it helps...

have a great day!!!

Each of two parents has the genotype green/blue, which consists of the pair of alleles that determine eye color, and each parent contributes one of those alleles to a
child. Assume that if the child has at least one green allele, that color will dominate and the child's eye color will be green
a. List the different possible outcomes. Assume that these outcomes are equally likely
b. What is the probability that a child of these parents will have the blue / blue genotype?
c. What is the probability that the child will have green eye color?

Answers

Step-by-step explanation:

what is the ability that the children will have green eyes collar

answer this asap I will give out brainliest test: "Birmingham was like an oven" (p 162) is an example of... *
idiom
personification
simile
metaphor

Answers

Answer:

that's confusing.. is there a picture?

How much salt is needed to fill a pit (rectangular) that is 8 m deep and 16 m wide and 4 m long? Show work

Answers

Answer:

512

16 · 4 = 64

64 · 8 = 512

Help me with this question

Answers

Answer:

20[tex]\pi[/tex]

Step-by-step explanation:

Circumference formula: [tex]2\pi r[/tex]

Since the diameter is 20, the radius will be half of the diameter

r=d/2, where d=20

r=20/2=10

C=[tex]2\pi r[/tex]

C=2(10)[tex]\pi[/tex]

C=20[tex]\pi[/tex]

What is the perimeter of triangle ABC?

12 units
13 units
14 units
18 units

\

Answers

Step-by-step explanation:

Here

A(-2,6)B(1,2)C(-2,-2)

Now,

[tex]\\ \tt\hookrightarrow AB=\sqrt{(-2-1)^2+(6-2)^2}[/tex]

[tex]\\ \tt\hookrightarrow AB=\sqrt{(-3)^2+(4)^2}[/tex]

[tex]\\ \tt\hookrightarrow AB=\sqrt{9+16}[/tex]

[tex]\\ \tt\hookrightarrow AB=\sqrt{25}=5units[/tex]

And,

[tex]\\ \tt\hookrightarrow BC=\sqrt{1+2)^2+(2+2)^2}[/tex]

[tex]\\ \tt\hookrightarrow BC=\sqrt{(3)^2+(4)^2}[/tex]

[tex]\\ \tt\hookrightarrow BC=\sqrt{9+16}[/tex]

[tex]\\ \tt\hookrightarrow BC=\sqrt{25}=5units[/tex]

And

[tex]\\ \tt\hookrightarrow AC=\sqrt{(-2+2)^2+(6+2)^2}[/tex]

[tex]\\ \tt\hookrightarrow AC=\sqrt{(0)^2+(8)^2}[/tex]

[tex]\\ \tt\hookrightarrow AC=\sqrt{8^2}=\sqrt{64}=8units[/tex]

Now

[tex]\\ \tt\hookrightarrow perimeter=5+5+8=18units[/tex]

A blueprint shows an apartment with an area of 15 square inches. If the blueprint's scale is 1 inch : 8 feet, what will the actual square footage of the apartment be?

Answers

I got 480 square feet. I assume that the apartment was a rectangle so the sides were 3in by 5in. Then I converted inches to feet and then found the area again

The actual area of the apartment will be 960 square feet.

What is dilation?

Dilation is the process of increasing the size of an item without affecting its form. Depending on the scale factor, the object's size can be raised or lowered.

There is no effect of dilation on the angle.

A blueprint shows an apartment with an area of 15 square inches.

If the blueprint's scale is 1 inch : 8 feet.

Then the scale factor will be 8/1 feet per inch.

Then the actual area square footage of the apartment will be

Actual area = 15 x (scale factor)²

Then the actual area of the footage will be

Actual area = 15 x (8/1)²

Actual area = 15 x 64

Actual area = 960 square feet

Thus, the actual area of the apartment will be 960 square feet.

More about the dilation link is given below.

https://brainly.com/question/2856466

#SPJ2

Abigail ordered a 32 oz steak that cost $60.
(cost to weight)

Answers

$1.9 I’m pretty sure

If you do 1.9 times 32 you get 60 plus 8 cents

Or it can be 1.8 times 32 which is 57

Solve the system of equations.
12x-5y = -20
y =x+4

Answers

Answer:

1. 12x-5y = -20 Answer: 2(picture)

2. y =x+4 Answer: 1(picture)

Step-by-step explanation: Hope this help :D

please answer my questoins

Answers

What's the question?

A tree farm has 70 rows of trees. The first row has 25 trees, the second
row has 30 trees, the third row has 35 trees, and so on. Let n be the
number of the row.
Write a function f(n) to represent the number of total trees in the nth
row. (gmm) pls help

Answers

Step-by-step explanation:

The function is:

[tex]f(n) = 25 + 5 \times (n - 1) \\ n \geqslant 1[/tex]

Question Progress
Homework Progress
20/32 Marks
a) Write 375 as the product of prime factors.
Give your answer in index form.
b) Work out the Highest Common Factor of 375 and 150.

Answers

Answer:

a) 375 = 3 × 3 × 3× 3 × 5

in index form it is 3 × 5³.

prime factor of,

150 = 2 × 3 × 5 × 5.

To find the HCF, multiply all the prime factors common to both numbers: Therefore, HCF = 3 × 5 × 5.

ANS : 75

hope this helps you☺️☺️

A farmer wants to know the effect of using various amounts of fertilizer in relation to the yield of his crops. Be subdivided a portion of his land into 10 separate but essentially equal plots. He divided the land so that all of the plots had equal exposure to sun, rain, and other environmental conditions. He randomly selected 2 of the 10 plots and spread 2 pounds of fertilizer over each of them. Then he randomly selected 2 of the remaining plots and spread 3 pounds of fertilizer over each of them. He continued with the last sets of plots in the same manner, spreading 4, then 5, then 6 pounds of fertilizer over each of them. Below is a computer output for linear regression of amount of fertilizer versus yield for the 10 plots of land.

Predictor Coef SE Coef T P
Constant 10.100 0.7973 12.67 0.000
Fertiz 1.150 0.1879 6.12 0.000

Required:
What is the equation of the least squares regression line from this sample?

Answers

Answer:

The equation of line is

[tex]\text{yield}=1.15\times \text{fertilizer}+10.1[/tex]

Step-by-step explanation:

The general equation of line is given as

[tex]y=mx+b[/tex]

where

y is the dependent variable which is yield in this case.

x is the independent variable which is fertilizer in this case

m is the coefficient of the fertilizer whose value is 1.150 from the given values.

b is the constant whole value is 10.100 from the given values.

Thus the equation becomes.

[tex]\text{yield}=1.15\times \text{fertilizer}+10.1[/tex]

What is the probability that a randomly selected subprime mortgage in the state during November 2008 was not current? (Round your answer to two decimal places.)

Answers

Complete question is;

The attached chart shows the (approximate) total number of subprime home mortgages in a state in November 2008, broken down into four categories.

What is the probability that a randomly selected subprime mortgage in the state during November 2008 was not current? (Round your answer to two decimal places.)

Answer:

Probability that the one randomly selected was not current = 0.36

Step-by-step explanation:

From the attached image, we can see that the four mortgage categories are mutually exclusive. This means that none of the 4 status depends on any other.

From the image attached;

Total number of subprime mortgages = 196,280

Number of current mortgages = 126,330

Thus;

Probability of a randomly selected subprime mortgage being current = 126330/196280 = 0.64

Then;

Probability that the one randomly selected was not current = 1 - 0.64

Probability that the one randomly selected was not current = 0.36

Which answer choice below describes an equation?
A
7 - X
B
x is 10 times greater than y
3
+n
5
D
Six times a number

Answers

b

x is 10 times greater then y 3+n 5

Jackie wants to buy a $25,000 car, but she can afford to pay only $400 per month for 5 years. If the interest rate is 8.25% compounded monthly, how much does she need to put down?

Answers

Answer:

A down payment of $5,388.50  to get the principle to $19611.50  for a monthly payment of $400 for 60 months at 8.25%

Step-by-step explanation:

I used a payment calculator

I don't know how else to solve the problem.  I thought I could find the equation, but I don't think this is it, since P didn't equal 19611.50

A = P[r(1+r)n] / [(1+r)n - 1]    

if you have the correct formula follow this process

A = 400        P principle ???    r = i%/12 = 0.0825/12 =  0.006875    n= 5×12 = 60

     solve for P      then    down payment = 25000 - P

 P = A / [r(1+r)n] / [(1+r)n - 1]    

    = A [(1+r)n - 1]  /  [r(1+r)n]

    =  400 [(1 +.006875)60 -1]  /  [0.006875( 1 +0.006875)60]

     

Round to The nearest hundred 554,695 help

Answers

Answer:

554,700

Step-by-step explanation:

Solution set no links please

Answers

I believe the answer should be 11/4, hopefully that works

I believe that the answer is 11/4. I hope this helps!

Farmer Bob can get 10 gallons of milk from 4 cows. How many gallons of milk can he get from 14 cows?

Answers

Answer:

40 gallons of milk

Step-by-step explanation:

trust me that's the answer

The farmer will get 35 gallons of milk from 14 cows.

Process:

1) find the unit rate. do this by taking the independent value and divide it by the dependent value

10/4=2.5

2) Take this number and multiply it by the next dependent value

2.5 x 14 = 35

The student council raised $150 during the school dance if they charge $3per ticket and received $24 in other donations what is the amount of tickets they sold?

Answers

3t + 24 = 150 this is the answer

the 11th term of an arithmetic sequence is 57 and the sum of the first and fourth term is 29. determine the first three terms of the sequence, the formular of nth term​

Answers

Let a (n) denote the n-th term of the sequence. Since the terms form an arithmetic sequence, you have

a (n) = a (n - 1) + d

for some fixed constant d. You can write any term in the sequence as a function of the first term:

a (n) = [a (n - 2) + d] + d = a (n - 2) + 2d

a (n) = [a (n - 3) + d] + 2d = a (n - 3) + 3d

and so on, down to

a (n) = a (1) + (n - 1) d

so given that a (11) = 57 (so that n = 11), you have

a (1) + 10d = 57 … … … [1]

The sum of the first and fourth terms is 29:

a (1) + a (4) = 29

but we can write a (4) in terms of a (1) :

a (1) + [a (1) + 3d] = 29

which gives us another equation in a (1) and d :

2 a (1) + 3d = 29 … … … [2]

Now solve [1] and [2] :

-2 (a (1) + 10d) + (2 a (1) + 3d) = -2 (57) + 29

-17d = -85

d = 5

a (1) + 10d = a (1) + 50 = 57

a (1) = 7

Then the n-th term of the sequence is given by

a (n) = 7 + 5 (n - 1) = 5n + 2

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