Mathematics High School

What is the discount and sale price of a $300 item that has been discounted 10%? 
(PLEASE EXPLAIN)

Answers

Answer 1
10% = 0.10

300 x 0.10 = 30
discount = $30

sale price = 300 - 30 = $270
Answer 2
10% is equal to .10 so 300x.10 equals 30 which is a $30 discount so your answer is $270 

Related Questions

HELPPPPPPPPPPPPPPPPPPPPPPPP

Answers

The discriminant is
.. d = b^2 -4*a*c
When the roots are imaginary, it is less than zero. You have a=4, so that means
.. b^2 -16c < 0
.. b^2 < 16c . . . . . . . . . . . . . . . . . coresponds to the 7th choice
This does not say it is part of a timed test. I will trust you to tell me if it is.
The discriminate is sqrt(b^2 - 4ac)
a is given as 4.
That makes the discriminate = sqrt(b^2 - 16c)
To get imaginary roots, you have to be taking the square root of something < 0

The answer is 
b^2 < 16c <<<< answer

Answer please anybody

Answers

Hi there.

f(x) = 2x + 1 
g(x) = x^2 - 7
(f - g)(x);
(2x + 1) - (x^2 - 7);
-x^2 + 2x + 8.

Your correct answer is C.)

I hope this helps!

3. In the rhombus, what are m∠1, m∠2 and m∠3? The diagram is not drawn to scale.

Answers

m< 1 = 128, m< 2 = 26, and m< 3 = 26.

Answer: m∠1 = 128°, m∠2 = 26° and m∠3 = 26°.

Step-by-step explanation:  We are given to find the measures of ∠1, ∠2 and ∠3 in the figure.

As shown in the attached figure, ABCD is a rhombus, where m∠A = 128°.

We know that, in a rhombus, all the sides are congruent,  the opposite angles are congruent and the adjacent angles are supplementary.

So, from rhombus ABCD, we have

[tex]m\angle A=m\angle C~~~~~\textup{[opposite angles]}\\\\\Rightarrow m\angle 1=128^\circ.[/tex]

Also, in ΔBCD, we have

[tex]BC=CD~~\textup{[all the sides are congruent]}\\\\\Rightarrow m\angle 3=m\angle 2~~\textup{[angles opposite to congruent sides care congruent]}.[/tex]

Now, since the sum of three angles of a triangle is 180°, we have from  ΔBCD that

[tex]m\angle 1+m\angle 2+m\angle 3=180^\circ\\\\\Rightarrow 128^\circ+m\angle 2+m\angle 2=180^\circ\\\\\Rightarrow 2\times m\angle 2=180^\circ-128^\circ\\\\\Rightarrow 2\times m\angle 2=52^\circ\\\\\Rightarrow m\angle 2=26^\circ.[/tex]

Therefore, m∠3 = 26°.

Thus, m∠1 = 128°, m∠2 = 26° and m∠3 = 26°.

Alex was thinking of a number. Alex subtracts 14 from it and gets an answer of 29.6. What was the original number?

Answers

29.6 + 14 = 43.6
43.6 - 14 = 29.6

Hope this helped!

A line has a slope of -1/2 and a y-intercept of –2. What is the x-intercept of the line? –4, –1, 1 ,4

Answers

to get the x-intercept, we simply set y = 0 and solve for "x".

now, we have the slope and the y-intercept, well, let's plug those two in the slope-intercept form, reason why is called that anyway,

[tex]\bf y=\stackrel{slope}{-\cfrac{1}{2}}x\stackrel{y-intercept}{-2}\implies 0=-\cfrac{x}{2}-2\implies \cfrac{x}{2}=-2\implies x=-4[/tex]

Can anyone help me with these two true/false questions? :)

9. Determine whether the statement is always, sometimes, or never true.

A cubic function has an inverse.

a. always true
b. sometimes true
c. never true

10. Determine whether the statement is always, sometimes, or never true.

A linear function has an inverse relation.

a. always true
b. sometimes true
c. never true

___

Thanks!,

Answers

Answer:

  9.  b. sometimes true

  10.  a. always true

Explanation:

9. Any function will have an inverse relation. This question is not specific as to whether that inverse relation must be a function. We will assume that that is the intent.

The attached graph shows a cubic function with an inverse function (green), and another without (red).

A cubic function will have an inverse function sometimes.

____

10. As stated above, any function will have an inverse relation.

A linear function will have an inverse relation always.

__

The graph shows a linear function with an inverse function (green), and one that has an inverse relation, but not an inverse function (red).

What is a possible value of sin(theta) when cos2(theta)=0.73?
a.0.37
b.0.63
c.0.26
d.0.74

Answers

We use the following trigonometric identity to answer the question:
 sin^ 2 (theta) + cos^ 2 (theta) = 1
 We substitute the values:
 sin ^ 2 (theta) + 0.73 = 1
 We cleared:
 sin ^ 2 (theta) = 1-0.73
 sin ^ 2 (theta) = 0.27
 Answer:
 a possible value of sin ^ 2 (theta) is:
 c.0.26 (nearest option)

The correct answer is option a. 0.37.

Given that [tex]cos(2\theta) = 0.73[/tex], find a possible value of sin(theta).

It is known that:

[tex]cos(2\theta) = 1-2sin^2(\theta)[/tex].

Substituting the given value:

[tex]0.73 = 1-2sin^2(\theta)[/tex]

Rearrange to solve for sin²(theta):

[tex]2sin^2(\theta)=1-0.73[/tex]

[tex]2sin^2(\theta)=0.27[/tex]

[tex]sin^2(\theta)=0.135[/tex]

So, [tex]sin(\theta) = \sqrt{0.135}\ or\ sin(\theta) = -\sqrt{0.135}[/tex].

Since we are looking for a possible value, we take the positive root:

[tex]sin(\theta) \approx 0.367[/tex]

Considering the options given, the closest possible value is 0.37.

Can anyone answer this ???

Answers

Mortgage A:
The payment is 190,000*(.0725/12)/(1 -(1 +.0725/12)^(-12*20)) ≈ 1501.71
The total of all payments is 240*1501.71 = 360,410.40, so the interest cost is this amount less the principal, or $170410.40.
Total loan cost = $2800 + 1%*190,000 +170,410.40 = 175,110.40

Mortgage B:
The payment is 190,000*(.0525/12)/(1 -(1 +.0525/12)^-240) ≈ 1280.30
The total of all payments is 240*1280.30 = 307,272.00, so the total interest cost is $117,272.00.
Total loan cost = $2800 +5%*190,000 +117,272.00 = 129,572.00

Mortgage A has a larger total cost than Mortgage B by $45,538.40

-4x ²-3x+2=0

can you help me solve this

Answers

Answer:

x = (-3 ±√41)/8

Step-by-step explanation:

When you match your equation to the form ...

... ax² +bx +c = 0

you can see that ...

a = -4b = -3c = 2

These are the values you use in the quadratic formua to find the solutions for x.

... x = (-b ±√(b²-4ac))/(2a) . . . . . . the quadratic formula

... x = (-(-3) ±√((-3)² -4(-4)(2)))/(2(-4)) . . . . fill in a, b, c

... x = (3 ±√(9+32))/(-8) . . . . simplify a bit

... x = (-3 ±√41)/8 . . . . . . put the minus sign in the numerator

Vertical line that passes through the point (3,-8)

Answers

Hi there! The answer is x = 3.

All vertical lines have an undetermined slope (since the formula which represents the slope has a denominator of 0). Therefore the general formula of a vertical line is the following x = c, with c representing the x-coordinate of the point that is passed by the line. Therefore, in your situation we get the line x = 3. When we plot this line, we can see it is a vertical line with x-coordinate 3 and that all values of y are passed, also y = - 8.

What is the value of x? Please Answer

Answers

The value of x would be 15 degrees.

This is a right angle and right angles are 90 degrees in total.

90-30= 60

We know that the missing part of the angle equals 60 degrees so we divide 60 by 4x.

60/4x=15.

I hope that was clear enough, sorry if it’s not. Have a great day and good luck!

Find the slope-intercept form of the line that passes through the given points. Include your work in your final answer. Type your answer in the box provided or use the upload option to submit your solution.

(1, -5) and (5, -1)

Answers

To get the slope-intercept form of the line that passes through (1, -5) and (5, -1). You first have to find the slope. The formula for slope is y2 - y1/x2 - x1. For this question, the slope would be 1.After that, substitute the slope and one of the points into the slope intercept form, y = mx + b. Then, solve for b or the y-intercept. Finally, put the slope and y-intercept into slope-intercept form.

find the perimeter of the quadrilateral. if x = 2 the perimeter is

Answers

the perimeter of any shape is equal to the sum of its sides.
then [tex]the perimeter=31+(4x^{2}+8x)+(7x+30)+(3x^{2}-5x+20)[/tex]
[tex] the perimeter= (4x^{2}+3x^{2})+(7x+8x-5x)+20+30+31=7x^{2}+10x+81[/tex]
for x=2
[tex] the perimeter= 7*(2)^{2}+10*2+81=7*4+20+81=28+101=129[/tex] 

Note:
Please double check the substitution but the procedure is 100% right.

Answer:

Step-by-step explanation:

Since perimeter of any polygon is represented by sum of its all sides.

Therefore, perimeter of the given quadrilateral = (4x² + 8x) + (3x² - 5x + 20) + (7x + 30) + 31

4x

For each value of w, determine whether it is a solution to -56=7(w-3).

Answers

this should help you out!

F(x)=x+2/2 what is the value of f(-8)

A.-4
B.-3
C.-5
D.-6

Answers

Answer: Choice B) -3

------------------------------------------------------

Work Shown:

f(x) = (x+2)/2
f(-8) = (-8+2)/2 ... replace every x with -8; use PEMDAS
f(-8) = (-6)/2
f(-8) = -3

The Rotation R maps all 60° about O the center of the regular hexagon. State the image of B for the following rotation.

R^6 =

B
E
O

Answers

It is B. Since each angle is 60 degrees, if you rotate B counterclockwise 6 times, it means that you rotated B 360 degrees. Therefore, the image of B would be B.

Answer:

B will be at same place after all six rotations.

Step-by-step explanation:

If rotation maps to [tex]60^{\circ}[/tex]

Then [tex]R^6[tex] means six rotations .

The given B after one rotation will shift in place of A

After second rotation will shift in place of F

After third rotation will shift in place of E

After fourth rotation will shift in place of D

After fifth rotation will shift in place of C

After sixth rotation will shift in place of B itself.

Therefore, B will come back to same place after all the required rotations.

John says the transformation rule (x, y) --> (x + 4, y + 7) can be used to describe the slide of the pre-image (4, 5) to the image (0, –2). What was his error?

Answers

For this case we have the following transformation:
 (x, y) -> (x + 4, y + 7)
 The ordered pair to which the transformation is applied is:
 (x, y) = (4, 5)
 Therefore, applying the transformation we have:
 (4, 5) -> (4 + 4, 5 + 7) -----> (8, 12)
 The error for this case is that John made the following transformation:
 (4, 5) -> (4 - 4, 5 - 7) -----> (0, -2)
 That is, rest the numbers instead of adding.
 Answer:
 his error was subtract instead of adding.
 The correct answer is:
 (8, 12)

Answer:


The pre-image is the point you start with. To check the transformation rule, substitute the values of the coordinates (4, 5) into the rule. You get (4, 5) → (4+4, 5+7). Simplify to get (4, 5) → (8, 12). This is the image. Instead the rule was applied to the image. This is the source of the error.

at the school carnival tickets can be exchanged for prizes. Mason wants a comic book that cost a 176 tickets. He needs 8 times as many tickets as he has now. How many tickets does mason have now?

Answers

Mason has 22 tickets now. You can know this because you divide 176 by 8

Two numbers are in the ratio of 5:6 if the sum of the numbers is 66 find the largest number

Answers

5k + 6k = 66 



k = 6

30 : 36 



Solution 2:

so 5x+6x=66
or 11x=66
or x=6
so the value of the larger number is 6*6=36


Which of the following is the graph of


btw A is wrong (the 2nd pic)

Answers

I say the 3rd one it is

Asymptotes: Values of x that makes the denominator equal to zero:
x+2=0→x+2-2=0-2→x=-2
Asymptote x=-2

Lim x→Infinite y =
Lim x→Infinite 1/(x+2)+1
1/(Infinite+2)+1
1/Infinite+1
0+1
1
Horizontal asymptote y=1

Answer: Third graph (left to right)

A charged particle is projected in the air such that its horizontal (x) and vertical (y) shifts are given by x(t) = 10t − t2 and y(t) = 6t, where x and y are in meters and time t is in seconds. What is the ratio of y to x at t = 4 seconds?

Answers

[tex]\bf \stackrel{ratio}{y:x}\implies \cfrac{y}{x}\implies \left. \cfrac{6t}{10t-t^2} \right|_{t=4}\implies \cfrac{6(4)}{10(4)-(4)^2} \\\\\\ \cfrac{24}{24}\implies \cfrac{1}{1}\implies \stackrel{ratio}{1:1}[/tex]

Somebody please help .. What is the exact volume of this right cone ?

Answers

[tex]\bf \textit{volume of a cone}\\\\ V=\cfrac{\pi r^2 h}{3}~~ \begin{cases} r=radius\\ h=height\\ -----\\ r=12\\ h=8 \end{cases}\implies V=\cfrac{\pi (12)^2(8)}{3}[/tex]

The graph of an exponential function is given. Which of the following is the correct equation of the function?

y = 0.65x
y = 2.4x
y = 3.5x
y = 0.32x

Answers

The answer is choice D

-----------------------------------------

Explanation:

We can rule out choice B and choice C which are y = 2.4^x and y = 3.5^x respectively. Why can we eliminate these? Because they are growth functions (the bases are larger than 1). The graph shown is a decay function. It goes downhill as you read it from left to right.

The answer is either choice A or choice D

If we plug in x = -2 into the equations for A and D, we get
y = 0.65^x = 0.65^(-2) = 2.36686
y = 0.32^x = 0.32^(-2) = 9.765625

The result for choice D is much closer to what the graph is showing. The graph appears to have the point (-2,11) on the curve. So that's why choice D is the best answer. 

Note: the graph is a bit small and its not entirely clear which points are on this graph other than (0,1). So this is a bit of educated guesswork. 

Can someone solve the equation |x+8| = x+8
Thank you!

Answers

Infinite i think. because the two equations are the same. 
Answer)-0

Hope This Helps Human <3

Which number is a solution of the inequality? Y>1.9 (1 point)
A. -9
B. -2
C. 2
D. 1.9

Please help!! I'm way behind!

Answers

The inequality represents a number greater than 1.9 . From the options, 2 is greater than 1.9

The answer is 2
C. 2. The > symbol means the answer has to be greater than 1.9. A and B are both negative numbers, and are thus less than 1.9. 1.9 = 1.9, but it is not greater than, so D would also be incorrect.

Two buildings are 200 feet apart. the height of the taller building is 50 ft. the angle of depression from the top of the taller building to the top of the shorter building is 8°. what equation below will correctly determine the height (h) of the shorter building?

Answers

The height of the taller building is 50ft, the height of the shorter building is h. The difference in heights will be:
(50-h) ft
tan x=opposite/adjacent
thus
tan 8=(50-h)/200
200*tan 8=50-h
28.11=50-h
h=50-28.11
h=21.89
the height of the shorter building is h=21.89 ft

In a bag there are 4 blue marbles,8 red marbles, and 5 orange marbles. if two marbles are drawn without replacement find the probability that both marbles are the same color, the second marble being red. the first being blue the second being orange

Answers

P( both same colour) = P(both blue) + P(both red) + P(both orange)

=  4/17 * 3/16 + 8/17 * 7/16 +  5/17 * 4/16  =  3/68 +  7/34 + 5/68  =  11/34 Answer

P( second marble being red)  = P(first marble not being red) * P( second being red)

= 9/17 * 8/16 = 9/17 * 1/2 = 9/34 answer

P(first ble and second orange) = 4/17 * 5/16 =   5/68  answer






What is the value of b^2 - 4ac for the following equation?

x^2 + 5x + 4 = 0

A: 9
B: 16
C: 25

Answers

x^2 + 5x + 4 = 0
a=1
b=5
c=4
b^2 -4ac =
25 -4 * 1 * 4 =
25 -16 =
9
answer is A





Which expressions are polynomials?

Select each correct answer.

A.20x² + y
B.20x2+y12
C.20x2y
D.20x²

Answers

Hi!

All the given answers are polynomials
A.20x² + y
B.20x*2+y*12
C.20x*2*y
D.20x²

Answer:


Step-by-step explanation:

Polynomial :  

An expression that can have constants (like 4), variables (like x or y) and exponents (like the 2 in [tex]y^{2}[/tex]), that can be combined using addition, subtraction, multiplication and division, but:

no division by a variable.

a variable's exponents can only be 0,1,2,3,... etc.

it can't have an infinite number of terms.

Thus according to definition all are polynomials

A.20x² + y


B.20x2+y12


C.20x2y


D.20x²



Given sinx=0.9 , what is cosx ? Enter your answer as a decimal in the box. Round only your final answer to the nearest hundredth.

Answers

The answer is 0.44. I don't know how it got there but that was the answer that the quiz said was correct lol

It is given sinx=0.9 .We need to find cosx.

We use the identity :

[tex] sin^{2} x + cos^{2} x =1 [/tex]

Substituting sinx=0.9

[tex] (0.9)^{2} +cos^{2} x =1 [/tex]

[tex] 0.81+cos^{2} x=1 [/tex]

Substracting 0.81 both sides:

[tex] cos^{2} x =1-0.81 [/tex]

[tex] cos^{2} x=0.19 [/tex]

Taking root of both sides cosx=0.435

Rounding to nearest hundredth

cosx=0.44.


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