25. Solve for x. 12x -15 = 129
O
x = 15
O
x=-12
O
x = 12
x= -15

Answer:

14%

Step-by-step explanation:

In this question, we have to find the percent markdown of the cost of the DVD player.

We know that the original price was $175.80, and now it is $150.65

To find the markdown, lets set this up as a proportion:

[tex]\frac{\$down}{original\$}=\frac{\%down}{100\%}[/tex]

First, lets find how much money was downed due to the sale. Do this by subtracting the sale cost from the original.

175.80 - 150.65 = $25.15

Since we now know our markdown cost, we can plug in the information to our proportion:

[tex]\frac{25.15}{175.80}=\frac{x}{100}[/tex]

Since we're solving for the percent markdown, we will replace the %down with an x, since we will be solving for x.

Solve for x:

[tex]\frac{25.15}{175.80}=\frac{x}{100}[/tex]

Cross multiply.

[tex]175.80x=2,515[/tex]

Divide both sides by 175.80

[tex]x=14.30602[/tex]

When you round the decimal to the nearest whole, you would get a markup of 14%

Answer:

1/5 that's what I think to

Answer:

Heat flow is high where crust is being created. (Ocean spreading centers are where new crust is being created, and have the highest heat flow.)

Step-by-step explanation:

Answer:

0.13

Step-by-step explanation:

4/200=0.02     12/200=0.06   10/200=0.05

0/02+0.06+0.05=0.13

The probability that a randomly selected participant dreams in black and white or color is 0.13.

"Probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event. The value is expressed from zero to one. Probability has been introduced in Math to predict how likely events are to happen. The meaning of probability is basically the extent to which something is likely to happen. This is the basic probability theory, which is also used in the probability distribution, where you will learn the possibility of outcomes for a random experiment. "

Probability of all black = 4/200=0.02

Probability of all white = 12/200=0.06

Probability of all other color = 10/200=0.05

So, probability that a randomly selected participant dreams in black and white or color =0.02+0.06+0.05=0.13

Hence, the probability that a randomly selected participant dreams in black and white or color = 0.13

To know more about probability here

https://brainly.com/question/11234923

#SPJ3

Answer:

The other angle is 190-7x.

Step-by-step explanation:

Angles in a triangle add up to 180 degrees.

Let A be the third angle.

A + (3x-20) + (4x+10) = 180

A = 180 - (3x - 20) - (4x + 10) = 190 - 7x

Answer:

n/6

Step-by-step explanation:

Trust me

Answer:

70 degrees

Step-by-step explanation:

i got a 30 degrees because its a straight line and 180-150=30

and same for 40 degrees

and 110 because its a triangle so inner angles have to add up to 180 so 180-(40+30)

70 = 1/2 of 360-(110+110)

Answer:

simple prt. $720

Step-by-step explanation:

Answer:

70

Step-by-step explanation:

I hope this is right but the equation is 6r + 60 = 480

So I did 480 subtracted 60 =420 and then I did 420 divided by 6

 I hope this is helpful!!!!

Answer: 245 feet

Step-by-step explanation:

Given: The height of the rocket after t seconds is represented by the formula:

[tex]h=70t-5t^2[/tex]

[tex]\dfrac{dh}{dt}=70-10t[/tex]  [Differentiate both sides w.r.t. t]

Put

[tex]\dfrac{dh}{dt}=0\\\\\Rightarrow\ 70-10t=0\\\\\Rightarrow\ t=\dfrac{70}{10}=7[/tex]

Also, [tex]\dfrac{d^2h}{dt^2}=-10<0[/tex] i.e. height is maximum at t=7.

Maximum height = [tex]h=70(7)-5(7)^2 = 490 - 245= 245\text{ feet}[/tex]

Hence, the maximum height the rocket reaches = 245 feet.

Answer:

Hope it helps ..and ☆HAPPY New year MY DEAR ☆

Step-by-step explanation:

Let the number of half dollars be x,

number of quarters = x + 2

amount of half dollars = 0.5x

amount of quarters = 0.25(x + 2)

= 0.25x + 0.5

total amount = 0.5x + 0.25x + 0.5

= 0.75x + 0.5

0.75x + 0.5 = 11.75

0.75x = 11.25

x = 15

number of quarters = x + 2

= 15 + 2

= 17

There are 17 quarters and 15 half dolla

17 quarters, 15 half dollars

Step-by-step explanation:

Answer: (2,30), (5,66)

Step-by-step explanation: I truly don’t know if this is correct, but at the beginning, the crystal was already 6 mm. She then realized it increased 12 mm every hour, so if one hour passed, it would be 12+6= 18. Okay, so now that we know that, we multiple the hours by 12 and then add the 6.

12x2= 24

24+ 6= 30,

12x5= 60

60+6= 66

Answer:

10+5+2+3=20

Step-by-step explanation:

Answer:

Yes that all equals 10

Step-by-step explanation:

What is your question exactly? That is just a statment.

Answer:

it is a

Step-by-step explanation:

Answer:

A) $6

Step-by-step explanation:

divide the 12 on the right by the 2 on the left. This gets X by itself. 12/2 is 6, therefor oyur sandwhich costs $6

Answer:

Gas prices $3.45

Jenny purchase 12.2 gallons of gas for her car.

12.2 x $3.45 = 42.09

A= $42.09

A polynomial multiple by a polynomial is always a polynomial. The given statement is true.

Polynomials are those algebraic expressions that consist of variables, coefficients, and constants. The standard form of polynomials has mathematical operations such as addition, subtraction, and multiplication.

When two polynomials are multiplied by each other, then each term of the first polynomial is multiplied by each term of the second polynomial.

The result is always a polynomial, regardless of what the coefficients might be of any of the terms, including the leading coefficients.

Thus, A polynomial multiples by a polynomial is always a polynomial.

Learn more about polynomials;

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Answer:

24 meters to feet is 78.7 feet, or you can round up to 79 feet.

Step-by-step explanation:

Answer:

C) the factory produces 25 chairs per hour

Step-by-step explanation:

Let's find the rate of change (slope):  

[tex]let:\\(x1,y1) =(2,50)\\(x2,y2)=(4,100)\\m=\frac{100-50}{4-2} =\frac{50}{2} =25 \\[/tex]

Given:

Triangle EFG and EHG are two right triangles.

[tex]m\angle HEG=35^\circ[/tex]

[tex]m\angle FGE=30^\circ[/tex]

To find:

The values of x and y.

Solution:

In triangle EFG,

[tex]m\angle EFG+m\angle FGE+m\angle FEG=180^\circ[/tex]        [Angle sum property]

[tex]90^\circ+30^\circ+(x+35)^\circ=180^\circ[/tex]

[tex](x+155)^\circ=180^\circ[/tex]

[tex]x+155=180[/tex]

[tex]x=180-155[/tex]

[tex]x=25[/tex]

In triangle EHG,

[tex]m\angle EHG+m\angle HEG+m\angle EGH=180^\circ[/tex]        [Angle sum property]

[tex]90^\circ+35^\circ+(y+30)^\circ=180^\circ[/tex]

[tex](y+155)^\circ=180^\circ[/tex]

[tex]y+155=180[/tex]

[tex]y=180-155[/tex]

[tex]y=25[/tex]

Therefore, the value of x is 25 and the value of y is also 25.

Answer:

Dan, because he types 60 words per minute.

Step-by-step explanation:

Jim: 3850/70 = 55 words/minute

David: 3300/60 = 55 words/minute

Dan: 2400/40  = 60 words/minute

Answer:

B and D

Step-by-step explanation:

Simplify the given expression as shown below:

= 2(6x+2) = D

Also

= 12x + 4 = B

Hence Both B and D are equivalent to 2(5x+2+x)

9514 1404 393

Answer:

  a, d

Step-by-step explanation:

We assume you want factors that use real integers.

a) 121x² +36y² . . . . cannot be factored using real numbers

b) (4x +4)(x +1) = 4(x +1)²

c) x(x² -4) = x(x -2)(x +2)

d) x⁴ -15n³ +12n² . . . . cannot be factored*

_____

* If the polynomial is n⁴ -15n³ +12n², then it factors as n²(n² -15n +12).

Answer:

its c on edge

Step-by-step explanation:

Answer:

Buy My Shlong

Step-by-step explanation:

Eat my virginia

Answer:

4 stones is the answer use basic mathematics

Answer:

30

Step-by-step explanation:

60% of 30 students is 18 girls

Answer:

30

Step-by-step explanation:

Step-by-step explanation:

1 page = 3 baseball cards

8 pages = 3 * 8 = 24 baseball cards.

We can represent this on the number line by putting a solid dot above the number 24 along the axis.

148

(-9 +61) - (5-101)

(-9 +61) = 52

(5-101) = -96

So, 52 - ( - 96 )

=> 52 + 96

=> 148

Hope it helps!

Answer:

-9+61-5+101

-14+162

148

hope this will help you

Answer:

B

Step-by-step explanation:

I checked it and it’s right hope this helps!

Answer:

my sister is really smart hold on i can give you the answer

Step-by-step explanation:

Answer:

4 8 12 16

3 6 9  12

Step-by-step explanation:

Answer:

29.2

Step-by-step explanation:

18.2+11=y

29.2=y..........

y = 29.2

Step-by-step explanation:

18.2 = y - 11

To solve the above equation, do the

following:

Collect like terms=>

18.2 + 11 = y

y= 29.2

Hope it helps!