The temperature decreased overnight by 15.2°C to a temperature of –12.8°C. Suppose t represents the temperature before it decreased.



Which equation can be used to represent this situation?



A.


t – 15.2 = –12.8


B.


t + 12.8 = –15.2


C.


t – 12.8 = 15.2


D.


t – (–15.2) = –12.8

Answer : (0,3) U  (3, ∞)

We need to find  the interval(s) over which the function is decreasing

We look at the intervals of x  where the graph is decreasing

Decreasing interval of the graph is the part where the graph goes down

We look at the part where the graph changes direction

In the middle  inverted U shaped graph , the graph changes direction and start decreasing at x=0

the graph is decreasing till x=3

so first decreasing interval is x=0  to 3. we write it as (0,3)

After x=3 the graph starts decreasing and it goes to infinity

So the second decreasing interval is 3  to infinity . We write it as (3, ∞)

Now combine both intervals by a 'U' union

(0,3) U  (3, ∞)

Graph Behavior u3l10

1. (-∞,-1) U (-1,0)
2. (0,3) U (3,∞)
3. x-intercept: none | y-intercept: (0,-4)
4. x=-1, x=3, y=0
5. even
6. (-∞,-4)
7. x-intercepts: (0,0),(3,0) | y-intercepts: (0,0)
8. f(3)=6
9. There is a jump discontinuity at x=-3
10. neither
11. f(x)=x/x^8+8x^4-7 | f(x)=x^3+4x
12. f(x) --> -∞ as x --> ∞ and f(x) --> 0 as x --> -∞
13. 2nd and 3rd graph (2nd graph has left arm facing down and right arm facing up and 3rd graph looks like a W)
14. 1st and 4th graph (1st graph has 2 lines, the one on the left side is point upwards and the line on the right side is pointing downwards, 4th graph is 1 line with the left arm facing up and right arm facing down)
15. reciprocal; y=1/x
16. f(x)=x^3
17. power; y=x^n | root; y=n√x
18. power; y=x^n ; n is even and greater than 0 | absolute value; y=|x|
19. reflection over the x-axis | horizonal compression by a factor of 3
20. reflection over the y-axis | horizontal shift to the left 2 units
21. reflection
22. 1st graph (starts from the left side (-2,0) and points towards the right side a bit more downwards)
23. 1st graph (ill describe it as a right angle with the curve facing left on the negatives side or a point where the curve is on is (-2,0))

happy "studying"!

The answer is 256.25

EXPLANATION

Let [tex]x[/tex] represent the number.

Then, [tex]\frac{16}{100}x=41[/tex]

We cross multiply yo obtain,

[tex]16x=41\times 100[/tex]

We now divide both sides by 16.

[tex]x=\frac{4100}{16}[/tex]

This will give us,

[tex]x=256.25[/tex]

Therefore the number is 256.26

a = 0.19

0.38/2 = 0.19

Hello,

The answer is A or y= 3/2x+9

How to solve;

The formula: Y=mx+b

Now solve the problem: 3x-2y=-18

Subtract -3x from both sides.

Now we have -2y=-3x-18

So divide both sides by y to get y by it self.

-2/-2=-3x-18/-2

Simplify and the answer is y=3/2x+9

Thus answer A

Hope that helps have a great day.

Answer:

4.44 is your answer

Step-by-step explanation:

Isolate the x. Multiply -4 to both sides

(x/-4)(-4) = (-1.11)(-4)

x = (-1.11)(-4)

Multiply

x = 4.44

4.44 is your answer

~

Answer:

The value of x is 4.44.

Step-by-step explanation:

Given : Expression [tex]\frac{x}{-4}=-1.11[/tex]

To find : What is the value of x?

Solution :

Expression [tex]\frac{x}{-4}=-1.11[/tex]

Multiply both side by 4,

[tex]\frac{x}{-4}\times 4=-1.11\times 4[/tex]

[tex]-x=-4.44[/tex]

Cancel negative sign both side,

[tex]x=4.44[/tex]

Therefore, The value of x is 4.44.

D. 27.6 is your answer

c or a !!!!!!!!!!!!!!!!!!!

 -6x - 2y = -18

-6x - 2(0) = -18

   -6x - 0 = -18

        -6x = -18

         -6      -6

           x = 3

hope this helps :)

Answer: 3

Step-by-step explanation:

If s, r and t are given right lines in the same plane and with condition

s⊥t  and r⊥t we can conclude that s║r ( s and r are parallel).

Good luck!!!

The conclusion is;

line r and s are parallel lines.

Lines in a plane that are consistently spaced apart are known as parallel lines. Parallel lines don't cross each other.

Given:

We have lines r, s and t in the same plane.

And s⊥t and r⊥t.

That means,

The conclusion is line r and s are parallel lines.

Therefore, r and s are parallel lines.

To learn more about the parallel lines;

brainly.com/question/16701300

#SPJ2

11.46% is the percent increase

To find the number, divide 34,400 by 344%

To solve this problem, we need to translate the phrase into an equation and solve for the unknown number.

The phrase "344% of what number is 34,400" can be translated as 344% * x = 34,400.

To solve for x, we divide 34,400 by 344% or 3.44.

Therefore, the number is 10,000.

https://brainly.com/question/29026277

#SPJ12

To find the number, divide 34,400 by 344% (or 3.44), resulting in the number 10,000.

To solve this problem, we need to find what number 344% of is equal to 34,400. Here's how we can do it step by step:

Step 1:

Translate the problem into a mathematical equation.

Let's denote the unknown number as [tex]\( x \)[/tex]. The problem translates to:

[tex]\[ 344\% \text{ of } x = 34,400 \][/tex]

Step 2:

Rewrite the percentage as a decimal.

[tex]\[ 344\% = \frac{344}{100} = 3.44 \][/tex]

Step 3:

Write the equation using the decimal form of the percentage.

[tex]\[ 3.44 \times x = 34,400 \][/tex]

Step 4:

Solve for [tex]\( x \).[/tex]

[tex]\[ x = \frac{34,400}{3.44} \][/tex]

Step 5:

Perform the division.

[tex]\[ x = 10,000 \][/tex]

So, 344% of 10,000 is 34,400. Thus, the unknown number is 10,000.

Look at the pictures (examples)

m∠1 = m∠6 → answer: none

m∠2 = m∠3 → answer: none

m∠2 = m∠C → answer: none

Answer: The correct option is (B) [tex]\left(5,\dfrac{1}{2}\right).[/tex]

Step-by-step explanation: We are given to find the midpoint of the line segment shown in the figure.

From the figure, we see

a line segment with co-ordinates of the endpoints (5, 4) and (5, -3).

We know that

the co-ordinates of the midpoint of a line segment with endpoints (a, b) and (c, d) is given by

[tex]M=\left(\dfrac{a+c}{2},\dfrac{b+d}{2}\right).[/tex]

Therefore, the co-ordinates of the line segment shown is given by

[tex]M=\left(\dfrac{a+c}{2},\dfrac{b+d}{2}\right)=\left(\dfrac{5+5}{2},\dfrac{4-3}{2}\right)=\left(5,\dfrac{1}{2}\right).[/tex]

Thus, (B) is the correct option.

QUESTION 1 ANSWER

The series is

[tex]\sum_{n=1}^{15}{ (2n-1)}[/tex]

So the nth term of this sequence is

[tex]U_n=2n-1[/tex]

We generate some few terms of the sequence as follows:

When [tex]n=1[/tex],

The first term of the sequence becomes,

[tex]U_1=2(1)-1[/tex]

[tex]U_1=1[/tex]

When [tex]n=2[/tex],

[tex]U_2=2(2)-1[/tex]

[tex]U_2=3[/tex]

When [tex]n=3[/tex],

[tex]U_2=2(3)-1[/tex]

[tex]U_2=5[/tex]

The constant difference is [tex]d=2[/tex].

The sum of the series is given by,

[tex]S_n=\frac{n}{2}(2a+(n-1)d)[/tex]

There are 15 terms in the series, therefore [tex]n=15[/tex]

 [tex]S_{15}=\frac{15}{2}(2(1)+(15-1)2)[/tex]

[tex]S_{15}=\frac{15}{2}(2+14(2))[/tex]

[tex]S_{15}=\frac{15}{2}(30)[/tex]

[tex]S_{15}=15\times 15[/tex]

[tex]S_{15}=225[/tex]

ANSWER TO QUESTION 2

The bottom row has [tex]23[/tex] boxes. This means [tex]a=U_1=23[/tex]

a) Since each row has 3 fewer boxes [tex]d=-3[/tex].

The nth row is given by,

[tex]U_n=23+(n-1)\times(-3)[/tex]

[tex]U_n=23+-3n+3[/tex]

[tex]U_n=23-3n[/tex]

The top row is the 6th row, meaning [tex]n=6[/tex].

[tex]U_6=23-3(6)[/tex]

[tex]U_6=23-18[/tex]

[tex]U_6=5[/tex]

b) The number of boxes in the entire display is given by

[tex]S_n=\frac{n}{2} (a+l)[/tex]

Where [tex]a=23[/tex], the first term(row) and [tex]l=5[/tex], the last term(row).

Since there are 6 rows,

[tex]S_6=\frac{6}{2} (23+5)[/tex]

[tex]S_6=3 (28)[/tex]

[tex]S_6=84[/tex]

ANSWER TO QUESTION 3

The number of visitors in the first week is [tex]a=5[/tex].

Since the number of visitors each week is doubled the number of visitors in the subsequent weeks, the sequence is a geometric progression with a common ratio of [tex]r=2[/tex].

The general term of a geometric sequence is

[tex]U_n=ar^{n-1}[/tex]

So in the 8th week, we have

[tex]U_8=5\times 2^{8-1}[/tex]

[tex]U_8=5\times 2^{7}[/tex]

[tex]U_8=5\times 128[/tex]

[tex]U_8=640[/tex]

Hence 640 people visited the website in the 8th week

Answers: Angle A is 36 degrees, angle C is 54 degrees

=================================================================

Work Shown:

The angles A and C are complementary, meaning they add to 90 degrees.

(Angle A) + (Angle C) = 90

(2x-4) + (2x+14) = 90

(2x+2x)+(-4+14) = 90

4x+10 = 90

4x+10-10 = 90-10 .... subtract 10 from both sides

4x = 80

4x/4 = 80/4 ..... divide both sides by 4

x = 20

If x = 20, then,

angle A = 2x-4 = 2*20-4 = 40-4 = 36 degrees

angle C = 2x+14 = 2*20+14 = 40+14 = 54 degrees

Note how A+C = 36+54 = 90 which helps confirm our answers.

Let Upper Level = x

Middle level = 2x+40

Lower level = 3x-50

The sum of those 3 has to equal 15,002 seats.

X + (2x+40) + 3x-50) = 15, 002

Simplify the left side by combining the like terms:

6x - 10 = 15,002

Add 10 to each side:

6x = 15,012

Divide both sides by 6 to solve for x:

X = 15012 / 6

X = 2502

The upper level is X , so has 2,502 seats.

Middle level = 2x +40 = 2(2502) +b40 = 5004 + 40 = 5,044 seats

Lower level = 3x-50 = 3(2502) -50 = 7506 - 50 = 7,456 seats

The number of seats in the upper level is required.

The number of seats the upper level has is 2502.

Let the number of upper level seats be [tex]x[/tex]

The lower level seats are [tex]3x-50[/tex]

The middle level seats are [tex]2x+40[/tex]

The total number of seats are 15002

So,

[tex]x+3x-50+2x+40=15002\\\Rightarrow 6x-10=15002\\\Rightarrow x=\dfrac{15002+10}{6}\\\Rightarrow x=2502[/tex]

The number of seats the upper level has is 2502.

Learn more:

https://brainly.com/question/24326586?referrer=searchResults

https://brainly.com/question/15125547?referrer=searchResults

14/25 , 29/50 , 53/100 , 13/20 and 3/5

Solution:

Put your numbers first in decimal form;

0.56 , 0.58 , 0.53 , 0.65 and 0.60

Then arrange them from the least to greatest;

0.53 , 0.56 , 0.58 , 0.60 and 0.65

Then revert your values to fraction form to give a final answer:

53/100 , 14/25 , 29/50 , 3/5 , 13/20

Answer:

Option C.

Step-by-step explanation:

A polynomial is defined as

[tex]P(x)=ax^n+bx^{n-1}+...+c[/tex]

where, [tex]ax^n[/tex] is leading term.

If n is even and a is positive, then the end behavior is up and up.

If n is even and a is negative, then the end behavior is down and down.

If n is odd and a is positive, then the end behavior is down and up.

If n is odd and a is negative, then the end behavior is up and down.

The given polynomial is  

[tex]P(x)=2x^7-8x^6-3x^5-3[/tex]

In this polynomial leading term is [tex]2x^7[/tex].

a=2 and n=7, which is odd.

Since n is odd and a is positive, therefore the end behavior is down and up.

We want to analyze the end behavior of a graph of a given polynomial by the degree and leading coefficient.

The correct option is C: "The leading term is 2x^7. Since n is odd and a is positive, the end behavior is down and up."

The general rule to know this is:

If the degree is even, then the two arms of the polynomial go in the same direction, then if the leading coefficient is positive, both ends go up.

If the leading coefficient is negative, both ends go down.

In the case where the degree is odd, each end go in a different direction.

If the leading coefficient is positive, the first end (the one for the negative values) go down, and the other end goes up.

When the leading coefficient is negative the inverse happens.

Here we have the polynomial:

p(x) = 2*x^7 - 8*x^6 - 3*x^5 - 3

We can see that the degree is 7, so it is odd, and the leading coefficient is positive (is equal to 2).

Then the first end goes down and the second goes up, thus the correct option is C.

If you want to learn more, you can read:

https://brainly.com/question/11536910

Answer: [tex]\text{Length of AG=}\frac{2\sqrt{63}}{3}[/tex]

Explanation:  

Please follow the diagram in attachment.  

As we know median from vertex C to hypotenuse is CM  

[tex]\therefore CM=\frac{1}{2}AB[/tex]

We are given length of CG=4  

Median divide by centroid 2:1  

CG:GM=2:1  

Where, CG=4

[tex]\therefore GM=2[/tex] ft

Length of CM=4+2= 6 ft  

[tex]\therefore CM=\frac{1}{2}AB\Rightarrow AB=12[/tex]

In [tex]\triangle ABC, \angle C=90^0[/tex]

Using trigonometry ratio identities  

[tex] AC=AB\sin 30^0\Rightarrow AC=6[/tex] ft

[tex] BC=AB\cos 30^0\Rightarrow BC=6\sqrt{3}[/tex] ft  

[tex] CN=\frac{1}{2}BC\Rightarrow CN=3\sqrt{3}[/tex] ft

In [tex] \triangle CAN, \angle C=90^0[/tex]  

Using pythagoreous theorem  

[tex]AN=\sqrt{6^2+(3\sqrt{3})^2\Rightarrow \sqrt{63}[/tex]

Length of AG=2/3 AN

[tex]\text{Length of AG=}\frac{2\sqrt{63}}{3}[/tex] ft

Answer:

200 visitors went to screen 1.

125 visitors went to screen 2.

175 visitors went to screen 3.

Step-by-step explanation:

We will find number of visitors who went to screen 1 by finding 40% of 500 as we are told that 40% of 500 visitors went to screen 1.

[tex]500*\frac{40}{100} =5*40=200[/tex]

Therefore, 200 visitors went to screen 1.

Now we will find number of visitors who went to screen 2. We are told that 25% of 500 visitors went to screen 2.

[tex]500*\frac{25}{100} =5*25=125[/tex]

Therefore, 125 visitors went to screen 2.

Now we will find the number of visitors who went to screen 3 by subtracting combined number of visitors who went to screen 1 and screen 2 from total number of visitors.

[tex]500-(200+125)[/tex]

[tex]500-325=175[/tex]

Therefore, 175 visitors went to screen 3.

To break even, the Waxmans need to make $5000 in profit. This can be achieved by selling 500 square yards of carpet, considering they make $10 profit per square yard.

In order for the Waxmans to break even, they will need to cover their startup costs through the profits they make selling carpet. The profit made per square yard of carpet sold is the selling price ($18) minus the cost per square yard ($8), which equals $10. Therefore, to break even, they would need to sell $5000 worth of profit. This means selling $5000/$10 = 500 square yards of carpet.

Learn more about Break Even Calculation here:

https://brainly.com/question/34658934

#SPJ2

After investing $400 in an account with 3% interest compounded annually, the balance after one year will be $412.

The question is asking how much the balance will be after investing $400 in an account that pays 3% interest compounded annually after one year. The formula to calculate compound interest is [tex]A = P(1 +\frac{ r}{n})^{nt[/tex], where A is the amount of money accumulated after n years, including interest, P is the principal amount (the initial amount of money), r is the annual interest rate (decimal), n is the number of times that interest is compounded per year, and t is the time the money is invested for in years. As the interest is compounded annually, n is 1.

For this question, we substitute P with $400, r with 0.03 (3% as a decimal), n with 1 (since it's compounded annually), and t with 1 (since it's compounded for one year).

Now, our formula looks like this: [tex]A = 400(1 + \frac{0.03}{1})^{1*1[/tex] = 400(1 + 0.03) = 400 * 1.03 = $412.

Therefore, after one year, the balance in the account will be $412.

The answers are 2 and 4

The graph of the equation is the set of all points that are solutions of the equation and point (10, 3) is on the graph of the equation thus, options (A) and (D) are correct.

A graph is a diametrical representation of any function between the dependent and independent variables.

The graph is easy to understand the behavior of the graph.

For example y = x² form a parabola now by looking at only the graph we can predict that it has only a positive value irrespective of the interval of x.

A graph is the locus of all points that are the solution of the function.

Substitute x = 10 into y = (1/2)x - 2

y = (1/2)10 - 2

y = 5 - 2 = 3 thus, (10,3) will be on the graph.

Hence "The graph of the equation is the set of all points that are solutions of the equation and point (10, 3) is on the graph of the equation".

To learn more about graphs,

brainly.com/question/16608196

#SPJ5

Answer:

[tex]80\leq x\leq 70[/tex]

Step-by-step explanation:

Mr. Venn knows that 60% of his students will score no more than 5 points above or below the class average, 75%, on the test.

Means the greater marks can be up to 80 and lowest marks can be up to 70.

So, the inequality that represents the test scores of 60% of his students is :

[tex]80\leq x\leq 70[/tex]