Mathematics High School

Select all of the following expressions that are equal to 2.5.
5 ÷ 2
-2(-1.25)
(-0.5)^2
-1 + (-1.5)

Answers

Answer 1
the first one, the second one, the fourth one

Answer 2
answer is
a) 5/2 = 2.5
b) -2(-1.25)

Related Questions

Today a car is valued at $42000. The value is expected to decrease at a rate of 8% each year. Choose the equation that can be used to solve the problem.
A.) y=42000(1+.08)^6
B.) y=42000(1+6)^8
C.) y=42000(1−.08)^6
D.) y=42000(1−.8)^6
And then: What is the value of the car expected to be 6 years from now?
This is the only question I don't understand, someone help please!

Answers

i think the correct answer is

C.) y=42000(1−.08)^6

as for what it will cost in six years:

25466.91

not sure if you have to include the decimal or round it.

Answer:

Option (c) is correct.

[tex]y=42000(1-0.08)^6[/tex] equation that can be used to solve the given problem and the value of the car expected to be 6 years from now is $25466.91

Step-by-step explanation:

Given :   Today a car is valued at $42000. The value is expected to decrease at a rate of 8% each year.

We have to choose the equation that can be used to solve the given problem.

We know

Depreciation formula given as,

[tex]A=P(1-\frac{r}{100} )^n[/tex]

Where A is the amount value after depreciation.

P is present value

r is depreciate rate.

n is time period.

Given : P = 42000  and r= 8% also given time period is 6.

Substitute , we have,

[tex]y=42000(1-\frac{8}{100} )^6[/tex]

Simplify , we have,

[tex]y=42000(1-0.08)^6[/tex]

Simplify we get,

[tex]y=25466.91[/tex]

Thus, [tex]y=42000(1-0.08)^6[/tex] equation that can be used to solve the given problem and the value of the car expected to be 6 years from now is $25466.91

Write an expression for the following situation and solve. Mr. Simms bought 20 pencils. He used 1/4 of the pencils and then gave 4 to his students. How many total pencils does Mr.Simms use and give away? Show your work.

Answers

Hi! 
1/4 of 20 pencils are 5 pencils.
Since he gave away 4 pencils,
Total = 5 + 4 = 9
Mr. Simms use and give away total 9 pencils.

Mr. Simms used 1/4 of the 20 pencils he bought, which equals 5 pencils, and gave away an additional 4 pencils, totaling to 9 pencils used and given away.

To solve how many total pencils Mr. Simms uses and gives away, we first find out how many pencils he used by taking 1/4 of the 20 pencils he bought. To do this, we multiply 20 by 1/4:

20 times 1/4 = 5

Mr. Simms used 5 pencils. He also gave away 4 pencils to his students. To find the total number of pencils used and given away, we add the pencils used to the pencils given away:

5 (used) + 4 (given away) = 9

Therefore, Mr. Simms used and gave away a total of 9 pencils.

How could you find an equation of a quadratic function with the zeroes of -3 and 1?

Answers

Hello,

The simpliest quadratic function is y=(x+3)(x-1)
or y=x²+2x-3

Analyze the key features of the graph of the quadratic function f(x) = -x2 + 2x + 10. A. Does the parabola open up or down?
B. Is the vertex a minimum or a maximum?
C. Identify the axis of symmetry, vertex and the y-intercept of the parabola.

Answers

see the attached graphic

the parabola open down
the vertex is a maximum
the axis of symmetry is the y axis
the y-intercept of the parabola.is the point (0,10)

SOS

Answer

A: Down

B: Max

C:

AOS: x = 1Vertex: (1, 11)Y-Int: (0, 10)

Step-by-step explanation:

A: If the leading coefficient (a) is positive, the graph opens UP. If it is negative, the graph opens DOWN.

B: Anytime the graph goes UP, there's a minimum. Anytime the graph goes DOWN, there's a maximum

C:

AOS: [tex]x = \frac{-b}{2a}, a=-1, b=2, c=10[/tex]

Vertex: [tex](\frac{-b}{2a}, y)[/tex]

Y-INT:  let x=0 and solve for y. The coordinate of the y-intercept is (0, y).

Hope this helps!!

help me please asap and plz be correct :)

Answers

The radii are all equal, so
.. AI = BI
.. 3x +7 = 5x -11
.. 18 = 2x
.. 9 = x

Then
.. AI = 3x +7
.. = 3*9 +7
.. = 34

AI = 34

A thief steals an ATM card and must randomly guess the correct three​-digit pin code from a 10​-key keypad. Repetition of digits is allowed. What is the probability of a correct guess on the first​ try?

Answers

Since repetition is allowed, there are 10(10)(10) choices available; 10 for the first digit, 10 for the second digit, and 10 for the third digit, coming out to a possible 1000 combinations.  The probability of getting the 1 correct on the first try would be 1/1000.

The probability of a correct guess on the first​ try will be [tex]0.001[/tex] .

What is Probability ?

Probability is the ratio of number of favorable outcome to the

i.e. Probability [tex]P(E)=\frac{number\ of\ favorable\ outcome}{Total\ number\ of\ outcomes.}[/tex]

We have,

An ATM Card having three-digit code.

Repetition of digits is allowed.

So,

As Repetition is allowed, and we have [tex]10-[/tex]key keypad, and have to guess [tex]3[/tex] digit code,

Then

Total number of outcomes [tex]=10*10*10=1000[/tex]

And

Number of favorable outcome [tex]=1[/tex]

So,

Probability [tex]P(E)=\frac{number\ of\ favorable\ outcome}{Total\ number\ of\ outcomes.}[/tex]

[tex]P(E)=\frac{1}{1000}[/tex]

[tex]P(E)=0.001[/tex]

So, the Probability of correct guess is [tex]0.001[/tex] .

Hence, we can say that the probability of a correct guess on the first​ try is [tex]0.001[/tex] .

To know more about probability click here

brainly.com/question/11034287

#SPJ3

If cos B = 7 over 22, then which of the following is correct?

a. csc B = 7 over 22
b. csc B = 22 over 7
c.sec B = 7 over 22
d.sec B = 22 over 7

Answers

I think it is c. sec B=7 over 22
Hope this helped : )
D is the correct answer

Math question help :)

Answers

You have two similar triangles.
Use corresponding parts of the two triangles.
If two triangles are similar, then the lengths of corresponding parts are proportional.
The small triangle has a vertical side that measures 6 ft. That side corresponds to the height of the tree, h, in the large triangle.
The small triangle has a horizontal side that measures 10 ft. That side corresponds to the side of the large triangle that measures 40 ft.

6 ft corresponds to h
10 ft corresponds to 40 ft

[tex] \dfrac{6}{h} = \dfrac{10}{40} [/tex]

Answer:

Step-by-step explanation:

I think its D.

Jenna throws a stone off a pier and into the ocean. The graph models how the height of the stone, above sea level, changes over time.

Select from the drop-down menu to interpret the decreasing interval of the graph.


The stone was falling toward the water from



https://static.k12.com/nextgen_media/assets/8090396-NG_AL1_O_07_012_Quiz_05.png

Answers

0.5 after it was thrown until 1.5 after it was thrown 

This should get you a hundred on the 4.11 quiz. :)

What is the name of a ray that divides an angle into two equal angles?

Answers

That ray is an "angle bisector."

What are the solutions to the equation?

n^2−8n+16=25

Enter your answers in the boxes.

n1=

n2=

Answers

To factor the equation, first make sure the right hand side is equal to 0. Do this by subtracting 25 from both sides of the equation.
The equation becomes,
n^2-8n-9 = 0

Factoring the equation now gives you (n-9)(n+1) = 0.
In order to find the solutions to this equation, find values of 'n' that make the equation equal to 0. 

In this case, if n is 9 or -1, we get the answer 0.

Proof: (9-9)(n+1) => (0)(n+1) = 0
or (n-9)(-1+1) => (n-9)(0) = 0.

Hope this made sense! If it didn't, please ask questions!

Answer:

help

Step-by-step explanation:

​ △JKL∼△QRS , JK is 8 centimeters, ​ QR ​is 12 centimeters, and RS is 9 centimeters.

What is ​ KL ​?

Enter your answer in the box.

Answers

Answer:

The measure of KL is 6 centimeters.

Step-by-step explanation:

It is given that  △JKL∼△QRS.

The corresponding sides of two similar triangles are proportional.

[tex]\frac{JK}{QR}=\frac{KL}{RS}[/tex]

[tex]\frac{8}{12}=\frac{KL}{9}[/tex]

[tex]8\times 9=KL\times 12[/tex]

Divide both sides by 12.

[tex]KL=\frac{72}{12}[/tex]

[tex]KL=6[/tex]

Therefore we can say that if △JKL∼△QRS, then the measure of KL is 6 centimeters.

Answer:

6

Step-by-step explanation:

He did too much math lol, a simple way of this is by dividing both sides initially.

12/9 = 1.5
9/1.5 = 6

Answers from anybody please??

Answers

The ratio of areas is the square of the ratio of linear dimensions. The smaller area is
.. (27 in^2)*(8/12)^2 = 27*(4/9) in^2 = 12 in^2

You have a cd-rw drive that advertises speeds of 32x/12x/48x. what is the read speed of the drive?

Answers

When you have CD-RW drive that advertises speeds of 32x/12x/48x, the first speed that you encounter from left to right is the writing speed, the next one is the rewrite speed, and the last one is the reading speed.
Knowing this we can tell that our CD-RW drive has:
32x of writing speed 
12x of rewriting speed
48x of reading speed

We can conclude that the reading speed of our CD-RW drive is 48x

Tiny's Tattoo Parlor sold 389 tattoos this month. 43 of those tattoos were arm tattoos. Based on this data, what is a reasonable estimate of the probability that the next customer does not get an arm tattoo?

Answers

Answer:

346/389

Step-by-step explanation:

correct on khan academy!

The reasonable estimate of the probability that the next customer does not get an arm tattoo is 346/389.

What is Probability?

Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1.

Here, Based on the given conditions, formulate

Probability = Favorable outcome / Total outcome

Calculate the sum or difference: (389-43)/389

get the result:  346/389

Thus.the reasonable estimate of the probability that the next customer does not get an arm tattoo is 346/389.

Learn more about Probability from:

https://brainly.com/question/9969755

#SPJ2

a basketball player made 27 free throws in her last 45 tries. what is the experimental probability that she will make her next free throw?

Answers

Hey mark me brainlest but ur answer is 27/45


Bess ur day.

Suppose that an individual has a body fat percentage of 16.4% and weighs 153 pounds. how many pounds of her weight is made up of fat? round your answer to the nearest tenth.

Answers

The question is asking X lbs = 16.4% of 153 lbs.
So multiply 0.164 times 153 to get 25.1lbs of fat.

how many fluorine atoms are found in 1.92 grams of AsF3?

Answers

First you need to find out how many moles of AsF3 are in 1.92 grams.  
The molar mass of AsF3 is 131.918 g/mole so  
1.92 g * (1 mole)/(131.918g) = .0146 moles AsF3 


 Each mole of AsF3 has 6.02 x10^23 molecules of AsF3 and each molecule of AsF3 has 3 flourines, so you need to convert from moles to molecules AsF3 to atoms of F 
 0.146 moles AsF3 * (6.02 x 10^23 molecules AsF3)/(1 mole AsF3) * (3 atoms F)/(1 molecule AsF3) = 2.64 x 10^22 atoms F

BRAINLIESTTT ASAP!!!!!!!!!

Answers

find where the blue and red lines touch
 the answer would be -3.5 and -0.5

the first choice is the correct one

I need help ASAP I will give brainliest if correct

Answers

Part 1)
we know that
the property of cyclic quadrilaterals for which opposite angles are supplementary
then
m∠A°+43°=180°------------> m∠A=180°-43°=137°

the answer is m∠A=137°


Part 2) Quadrilateral ABCD ​ is inscribed in a circle. What is the measure of angle A?

we know that
the property of cyclic quadrilaterals for which opposite angles are supplementary
then:
m∠A+m∠C=180∘
(2x+9)+(3x+1)=180---------------> 5x+10=180
x=(180-10)/5=34

m∠A=2x+9-------------> 2*34+9=77°

the answer is m∠A=77°

*Please answer*

Don't understand. Please help.

Answers

The answer is  Product of Powers Property.
4³ x 4⁷ = 4³⁺⁷ = 4¹¹

It is the third option, Product of Powers

I have attached an image that may help you 

Which graph represents a phase shift of pi/2 units right for the graph of y=cos x

Answers

Solution:

we are given that [tex]y=cos x[/tex]

Here we are going to plot two curves one for cosx and the othere also of cosx but after making a phase shift of [tex]\pi/2[/tex]

When we do a phase shift by an angle of theta , in that case actaully we add angle negative theta .

For example when we shift the phase of sinx by [tex]\pi/2[/tex] we get  [tex]sin(x-\pi/2).[/tex]

Hence we are going to plot the curve of

[tex]y=cosx\\ \\ y=cos(x-\pi/2)=sinx\\[/tex]

Hence the correct option is B.

The domain of f(x) is the set of all real values except 7, and the domain of g(x) is the set of all real values except –3. What describes the domain of (gºf)(x)?

Answers

The function g°f(x) can be written as g(f(x)), which means that you take a random x, put it into f(x) which gives you a value (let's call it y). You then put y into g(y) and you find the result.

Therefore the Domain you are looking for in words is every x that can be put into f(x) and that gives you a value y that can be put in g(y).

Mathematically:
Dom (g°f) = {x ∈ Dom(f) | f(x) ∈ Dom(g)}

In your case:
Dom (g°f) = { x ∈ R - {7} | f(x) ∈ R - {-3} } 

Which pair of measurements is equivalent?
8,600 mg, 86 g
2,500 g, 250 kg
3.4 kg, 3,400 g
480 g, 4.8 mg

Answers

Let's look at each pair and change it so the first one in the pair will be what the second one will be converted to.
8,600 mg = 86,000 mg; So now, the first one is not equivalent.
2,500 g = 250,000 g; Not that one either.
3.4 kg = 3.4 kg; This one is correct. We can check by checking the last pair.
480 g = .0048 g; Nope.
So 3.4 kg, 3400 g would be the correct answer.

Answer:

3.4 kg, 3,400 g



A rectangle is 1/2 feet long and 3/4 feet wide. What is the area of the rectangle?

Answers

3/8 because to find the area you multiply both numbers so 1*3 is 3 and 2*4 is 8 so your answer should be 3/8

The area of the rectangle having a length of 1.2 feet and a width of 3/4 feet is 3/8 sq feet.

What are the area and perimeter of a rectangle?

We know the perimeter of any 2D figure is the sum of the lengths of all the sides except the circle and the area of a rectangle is the product of its length and width.

We know the area of a rectangle is (length×width).

Given, A rectangle is 1/2 feet long and 3/4 feet wide.

Therefore, The area of this rectangle is,

= (1/2×3/4) sq feet.

= 3/8 sq feet.

learn more about rectangles here :

https://brainly.com/question/29123947

#SPJ2

Four consecutive integers sum to 70. What is the least of the 4 integers?

Answers

The smallest integer is 16

I need to spend exactly £200, how?

Answers

You can just rent dancers for 4 hours 4 * 50 = 200

Goran runs 6 miles in 57 minutes how many miles does he run per minute?

Answers

57/6 = 1/x
57 = 6x
x = 0.11 miles per minute

helppppppppppppppppppppppp

Answers

Answer:
log base 2 of 100 is about 1/4 the value of log base 6 of 20

Explanation:
We will get the value of each of them separately and then compare these values.
log base 2 of 100 = 6.6438
log base 6 of 20 = 1.6719

Comparing these values, we will find that:
log base 2 of 100 is about 1/4 the value of log base 6 of 20

Hope this helps :)

How long is the base of a parallelogram if it has an area of 100 m2 and a height of 5 m? Enter your answer in the box.

Answers

The answer is 20 m given Volume of 100m² and height of 5m.
So, we know the area formula of a parallelogram
Area = Base x Height
We have two values which are given;
Area = 100 m² 
Height = 5 m
Now, we have to plug in the given values to find the missing, which in this case, is the base

100 = Base x 5
To find the value of base, we have to bring 5 to the other side, since it is multiplied, we do the reverse function, which is division.

[tex] \frac{100}{5} = \frac{5(Base)}{5} [/tex]
5 and 5 cancels out in the right hand side

20 = Base

The base is 20 m long
Other Questions
Suppose that a catalyst lowers the activation barrier of a reaction from 125 kj/mol to 57 kj/mol . by what factor would you expect the reaction rate to increase at 25 c? (assume that the frequency factors for the catalyzed and uncatalyzed reactions are identical.) Which ordered pair will be the solution for the function y = 12 - x? (7, 4)(6, 6) (4, 9) (2, 14) horseshoe crabs are one of the only five living species of arthropods classA) merostomata B)chelicerata C)Arachinda D) none of the above The graph below shows a line segment PQ:Graph of line segment PQ with endpoints at negative 2 comma 1 and 4 comma 4What is the slope of the line segment PQ? 2 1 over 2 1 over 2 2 The author most likely included this paragraph to persuade the reader that Captain Mark Haines was highly qualified to assist. explain why Jerry Jaax chose Captain Mark Haines to accompany him inside. create a vivid image of the men who are entering the hazardous building. inform the reader that Jerry Jaax is a man who carefully considers his options. Which sentence has a dangling modifier?Walking to the movies, the thunderstorm drenched Cody.Walking to the movies, Cody was drenched by seven storm.As Cody walk to the movies, he was drenched by a thunderstorm.As Cody walk to the movies, of sudden storm drenched him. For a lab assignment, you are presented with a fungus and are asked to observe and draw conclusions about its reproductive cycle. During the first hour you notice about 10% of your sample has produced dust-like spores at the tips of its hyphae. After 8 hours, 90% of the sample is producing the spores. You conclude that The sum of the first 30 terms of the sequence an=6n+5 is What is the value of n?Enter your answer in the box.n =____m If you can buy one can of pineapple chunks for $2 then how many can you buy with $10 The fact that information must be repeated - known as maintenance rehearsal- in order to remain in short-term memory is evidence that short-term storage is: Which items in this image are electrically conductiv Which sentence contains a punctuation error?One-quarter cup of chocolate chips does not seem like enough.She is a well known basketball player.This well-known recipe is the one I always use for oatmeal cookies.He bakes loaves of the best-tasting bread we have ever eaten. Ava rounded 19,350 to the nearest thousand and got 20,000. Which of the following statements is true? Ava rounded correctly. Ava rounded incorrectly; the answer should be 19,400. Ava rounded incorrectly; the answer should be 19,000. Ava rounded incorrectly; the answer should be 19,300. On which coastline was the ancient kingdom of Kalinga located? A.northwestern B.southeastern C.southwestern D.northeastern a medication is supplied in a mixture that contains 7.5 mg of medication per millimeter of solution. the dosage rate is 10.0 mg of active ingredient per kilogram of body weight. calculate the number of millimeters of medication that should be given to a patient weighing 187 lb. Which of the following does not contribute to soil consistence? a. texture b. temperature c. organic matter d. mineral types Please select the best answer from the choices provided A B C D What are three rational numbers between 0.2 and 0.3 (one must be a fraction)? #1: Jim, Jane, Ann, and Bill measure an objects length, density, mass, and volume, respectively. Which students measurement might be in centimeters?A. Bills B. Janes C. Jims D. Anns**MY answer: C. Jim's#2: How many centimeters are in 0.05 kilometers?A. 50 B. 500 C. 5,000 D. 50,000***My answer: C. 5,000 (100+ POINTS) A fresh cup of coffee is placed on a table to cool. The table below shows the relationship between the temperature of the coffee, y, as it relates to time in minutes, x.Time (minutes), x 0 1 2 3Temperature (F), y 200 150 112.584.375Which function can be used to represent the relationship shown in the table?y = (0.75) xy = 0.75(200) xy = 200(-0.75) xy = 200(0.75) x