I do not know which formula to use

Carla bought a dress at a sale for 20% off the original price. The sale price of the dress was $68.90. Find the original price of the drees, in dollars.


Step by step explanation please.

Answer:

-3<x<5

Step-by-step explanation:

Given the inequality 2x-3<7 and 5-x<8

Solve 2x-3<7

Add 3 to both sides

2x-3+3 < 7+3

2x < 10

2x/2 < 10/2

x < 5

Solve 5-x<8

subtract 5 from both sides:

5-x-5<8-5

-x < 3

multiply both sides  by -1

-(-x) > -3

x > -3

-3<x

Combine both solutions x < 5 and -3<x

-3<x<5

The solution to the compound inequality is -3<x<5

Answer:

20x - 21y + 14

Step-by-step explanation:

1/5(150x - 80y + 50 - 50x- 25y + 20)

Step 1 - Distribute

1/5 • 150x = 30x

1/5 • (-80y) = -16y

1/5 • 50 = 10

1/5 • (-50x) = -10x

1/5 • (-25y) = -5y

1/5 • 20 = 4

Step 2 - Combine Variables

30x - 10x = 20x

-16y - 5y = -21y

10 + 4 = 14

Step 3 - Arrange the Set of Numbers

20x - 21y + 14

This is the simplified expression, I know it is correct, I doubled checked on my expression calculator.

Answer:

C. 2/3

Step-by-step explanation:

50% of 24 is 12, which makes the fraction of what they sold together I believe is C? I'm sorry if I'm wrong I'm just trying to help.

Inequality has a set of solutions there could be infinitely many solutions to inequality.

A mathematical phrase in which the sides are not equal is referred to as being unequal. In essence, a comparison of any two values reveals whether one is less than, larger than, or equal to the value on the opposite side of the equation.

Let's consider inequality,

n > 3 where n is the natural number.

Now 4,5,6,7.... up infinite will be the solution of the inequality.

Therefore, inequality consists of infinitely many solutions.

Hence "Inequality has a set of solutions there could be infinitely many solutions to inequality".

For more about inequality,

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Answer:

Is there any other info?????

Step-by-step explanation:

Answer:

(x,y)=(2,5)

Step-by-step explanation:

Answer:

1.25 pints

Step-by-step explanation:

gallon king!!!

1 gallon king has 4 queens (4 quarts)

1 queen (quart) has a 2 princes (pints)

1 prince has 2 cats (cups)

one cup has 8 oz

put it all together:

2 and 1/2 cups

2 cups = 1 pint

1 pint and 1/2 cup

1/2 cup is 1/4 of a pint

sooo... it's 1.25 pints!

Answer:

9y - 3xy

Step-by-step explanation:

3y(3 - x)

Distribute;

3y*3 - 3y*x = 9y - 3xy

Answer:

44.09

Step-by-step explanation:

Answer:

Step-by-step explanation:

220 is the answer

176 + 43 = 219

219 is almost 220

I love theseeee

Answer:

the constant of proportionality is 10

Step-by-step explanation:

to find the constant you have to get the first number or x to be 1 so 3÷3 equals one and whatever you do to one side do to the other so 30÷3=10

hope this helps and makes sense

Answer:

60/100 times by 95 so 57

Step-by-step explanation:

Answer:

i think its 6

Step-by-step explanation:

Answer:

I believe the answer is 900.

Given:

Jan and Julie started their ride at 09:30 and finished at 15:15.

Stopped for a drink = 20 minutes

Lunch = 45 minute

Rest = 10 minutes

To find:

Time they are riding on their bikes (excluding stops).

Solution:

Jan and Julie started their ride at 09:30 and finished at 15:15.

So, total time of ride including stops is 5 hours 45 minutes or we can say 345 minutes calculated as

[tex]30+60+60+60+60+60+15=345\text{ minutes}[/tex]

We need subtract Drink, lunch and rest time from the total time to get the Time they are riding on their bikes (excluding stops) is

[tex]345-20-45-10=270 \text{ minutes}[/tex]

Therefore, the total time they are riding on their bikes (excluding stops) is 270 minutes.

Answer:

poit 1 5 q

Step-by-step explanation:

Answer:

Area = 156.25π meters

Step-by-step explanation:

In order to identify the area of the circle, you would need the radius. In order to find the radius, you would plug in the circumference (25π) into the equation for the circumference of a circle, like this:

C = 2πr

25π = 2πr

You would then solve the equation for r  (the radius)

25π = 2πr

12.5π = πr

12.5 = r  

Then you would plug the radius into the equation for the area of a circle.

A = π(r^2)

A = 12.5^2π

A = 156.25π

So your answer would then be 156.25π meters, since that was the unit of measurement

Answer: 156.25π m. Hope this helps.

Answer:

1/ 4=4

1/3+3/1

3/4=4/

Step-by-step explanation:

the reflected image of the point (5,-1) under the y-axis is (-5, -1).

A pair of numbers called coordinates are used to locate a point or a form in a two-dimensional plane. The x-coordinate and the y-coordinate are two numbers that define a point's location on a 2D plane.

Given a coordinate (5, -1), find the image of the coordinate under a reflection in the y-axis.

Since

thus, Coordinates of image = (-5, -1)

Therefore, the image of the point (5,-1) under a reflection in the y-axis is (-5, -1).

Learn more about coordinates here:

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Answer: If you have three quarters, four dimes, and four pennies, you have $1.19, the largest amount of money in coins you could have without being able to make change for a dollar

Answer:

3.5

Step-by-step explanation:

2x + 5 = 12

-- minues five from both sides --

2x = 7

-- divide both sides by two ---

x = 3.5

Please give brainliest.

Answer:

Im not sure but go with 24

exterior angle = sum of its opposite interior angles

Which means :-

[tex]x + 21 + 63 = 3x[/tex]

[tex]21 + 63 = 3x - x[/tex]

[tex]21 + 63 = 2x[/tex]

[tex]84 = 2x[/tex]

[tex]2x = 84[/tex]

[tex]x = 84 \div 2[/tex]

[tex]x = 42°[/tex]

Therefore , the correct option is :-

Answer:

X=3

Step-by-step explanation:

Equation 1:

7×3=21

21+18=39

Equation 2:

10×3=30

30+9=39

If you replace x with 3 on both equations then you get 39 and if you get 39 on both equations that means it is equal.

Could I please have BRAINLIEST?

Answer:

45.23

Step-by-step explanation:

Answer:

25.66+13.20+6.36=45.22

Step-by-step explanation:

Answer:

Step-by-step explanation:

When parabola f(x) = ax² + bx + c passes through point (x₁, y₁) that means if x=x₁ then f(x)=f(x₁)=y₁

(0, 6) ⇒   6=a·0²+b·0+c    ⇒   c=6

f(x) = ax² + bx + 6

(-3, 15)  ⇒  15 = a(-3)² + b(-3) +6   ⇒  9a - 3b = 9 ⇒

                                                      ⇒ 3a - b = 3  ⇒ b = 3a - 3

(-6, 6)  ⇒  6 = a(-6)² + b(-6) +6  ⇒ 36a - 6b = 0  ⇒

                                                      ⇒  6a - b = 0   ⇒ b = 6a

6a = 3a - 3   ⇒  3a = - 3  ⇒  a = -1

b = 6(-1) = -6

So the equation:

                         f(x) = (-1)x² + (-6)x + 6

                         f(x) = -x² - 6x + 6