you are buying decorations for a birthday party. the before tax total for 3 rolls of crepe paper and 20 balloons is $11.40. after you start decorating, you need more supplies. you buy 2 more rolls of crepe paper and 10 more balloons for $7.20 before tax. how much did each cost?

please help with an explanation.

Answer:

x3y+7x2y2+10xy3

Step-by-step explanation:

Answer:

x=-2, y=3. (-2, 3).

Step-by-step explanation:

x-4y=-14

x+5y=13

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

-x+4y=14

x+5y=13

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

9y=27

y=27/9

y=3

x+5(3)=13

x+15=13

x=13-15

x=-2

Step-by-step explanation:

the middle one has to be the same for both part ratios.

the best here is to bring the ratio element of B in the first part ratio to 10. we need to double the B element there

for that (as a ratio is a fraction) we also have to adapt the A element in the same way.

so, we get

4×2 : 5×2 : 9 =

= 8 : 10 : 9

and that is also shown in the graphic.

Answer:

X:Y:Z= 8:10:9

Step-by-step explanation:

Let x be the number of students in class A

Let y be the number of students in class B

Let z be the number of students in class C

x:y = 4:5

y:z= 10: 9

x:y:z = ?

Find the LCM of the y terms (5 and 10 ) which is 10

Divide 10 by the first y term (5) = 2

Divide 10 by the second y term(10) = 1

X: y = (4 x 2) :(5 x 2)= 8:10

y:z =(10 x 1) : (9:1)= 10:9

x:y:z= 8:10:9

Answer:

A) (-4,-3), B) (-1,1.5), D) (0,3)

Step-by-step explanation:

First turn 4y - 6x = 12 to slope intercept form

(y = mx + b), by adding 6x on both sides in order to move it to the other side. So now you have

4y = 6x +12, next divide both sides by 4 in order to get y by its self. Now you have y = 6/4x + 3, since 6 can't be divided by 4 yet 12 can.

Lastly you graph it, here it is graphed for you above⤴⤴⤴

Hope this helped :)

Answer:

x = 5 - y/3

Step-by-step explanation:

The standard form is 4x- y= 3.

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side. It demonstrates the equality of the relationship between the expressions printed on the left and right sides. LHS = RHS is a common mathematical formula.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given:

y-1=4(x-1)

Now, writing the above equation in standard form

y- 1 = 4x -4

y = 4x - 4 +1

y= 4x - 3

4x - y = 3

Hence, the standard form is 4x- y= 3.

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Question: In a sale, the price of a book is reduced by 25%. The price of the book in the sale is £12. Work out the original price of the book

Answer: £16

Step-by-step explanation:

To determine the original price of the book, we can use the fact that the sale price is 75% (100% - 25%) of the original price. Let's denote the original price as x.

75% of x = £12

To solve for x, we can set up the equation:

0.75x = £12

To isolate x, we divide both sides of the equation by 0.75:

x = £12 / 0.75

x = £16

Therefore, the original price of the book was £16.

To calculate the probability that a 0.270 hitter in baseball will not get a hit on his next at-bat, we need to know the hitter's batting average.

A batting average of 0.270 means that the hitter gets a hit in 27 out of every 100 at-bats. Therefore, the probability of getting a hit on any given at-bat is 0.270.

The probability of not getting a hit on a single at-bat can be calculated as 1 minus the probability of getting a hit. So, the probability of not getting a hit on a single at-bat for a 0.270 hitter is:

Probability of not getting a hit = 1 - Probability of getting a hit

Probability of not getting a hit = 1 - 0.270

Probability of not getting a hit = 0.730

Therefore, the probability that a 0.270 hitter in baseball will not get a hit on his next at-bat is 0.730 or 73.0%.

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Answer:

26 units^2

Step-by-step explanation:

You have all the information to find the area of each of the triangles that make up the kite so all you need to do is find the area of each of them and add them all together.

Triangle 1 = 1/2(2 x 7) = 7

Triangle 2 = 1/2(2 x 7) = 7

Triangle 3 = 1/2(2 x 6) = 6

Triangle 4 = 1/2(2 x 6) = 6

Total Area                   = 26

The area of the kite is 26 units^2

Answer: he will spend $55 or more

Answer:

He will spend greater than or equal to $55

Step-by-step explanation:

5 dollars per pound times 11 or more 5x11=55.  $55 or greater

The correct option is b.

A quadratic equation is an equation that can be written in the form of

ax²+bx+c.

Where a is the leading coefficient, and

c is the constant.

The leading coefficient of an equation is a coefficient of the term having the highest power in the equation.

Given options:

a.)  \(f(x) = -12x^2+3x+1 \\\)

b.)  \(f(x) = 3x^2+11x-12 \\\)

c.)  \(f(x) = 12x^2+3x+3\\\)

d.)  \(f(x) = 3x -12.\)

As it is given that the leading coefficient of the equation is 3. therefore, the value of the 'a' in the general quadratic equation is 3,

3x²+bx+c,

Also, the value of the constant is -12, therefore, the value of c is -12,

3x²+bx-12

From all the given options the only feasible option is b only.

Hence, the correct option is b.

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Answer:

f(x) = 3x2 + 11x – 12

Step-by-step explanation:

aka B 2022

Answer:

The dogs are 21. 8 m from each other in 5 seconds

Step-by-step explanation:

Given;

speed of Edison, v = 10 m/s

speed of Einstein, u = 8 m/s

angle between the two dogs, θ = 25°

let the distance ran by Edison in 5 seconds = x = (10 m/s x 5 s) = 50 m

let the distance ran by Einstein in 5 seconds = y = (8 m/s x 5 s) = 40 m

let the distance between the two dogs after 5 seconds = z

x , y and z forms a triangle with an angle between x and y as θ

The third side, z, can be calculated using cosine rule

z² = x² + y² - 2xyCosθ

z² = 50² + 40² - (2 x 50 x 40)Cos25

z² = 4100 - 4000Cos25

z² = 474.7689

z = √474.7689

z = 21.789 m ≅ 21. 8 m

Therefore, the dogs are 21. 8 m from each other in 5 seconds

Answer:

The solution to the system of equations is x = 3 and y = 6.

Step-by-step explanation:

To solve the system of equations:

Equation 1: x - y = -3

Equation 2: x + y = 9

There are several methods to solve this system of equations, such as substitution, elimination, or graphing. I'll demonstrate the substitution method:

From Equation 2, we can solve for x:

x = 9 - y

Substitute this value of x into Equation 1:

(9 - y) - y = -3

Simplify:

9 - 2y = -3

Now, isolate the variable y:

-2y = -3 - 9

-2y = -12

Divide both sides by -2:

y = -12 / -2

y = 6

Now substitute the value of y back into Equation 2 to find x:

x + 6 = 9

Subtract 6 from both sides:

x = 9 - 6

x = 3

Answer:

Question relates to a Arithmetic Sequence {30,32,34...} where d = 2

and the terms are the enumber of seats in each row.

S%5Bn%5D=%28n%2F2%29%282%2Aa%5B1%5D%2B+%28n-1%29d%29  |Sum of the seats in the 26 rows.

S%5B26%5D=%2826%2F2%29%282%2A30%2B+%2825%292%29 = 1430 seats in the ALL 26 rows

Step-by-step explanation:

A line will have a positive slope if it makes an acute angle with a positive x-axis while if it makes an obtuse then the slope will be negative thus point (x₁,y₁) can be (2,5) and (x₂,y₂) could be (-7,5).

A slope is a tangent or angle at a point and a slope is the intensity of inclination of any geometrical lines.

The slope is also calculated by differentiation for example slope of y = sinx will be y' = cosx.

A line will have a positive slope if it makes an acute angle with a positive x-axis while if it makes an obtuse then the slope will be negative.

As shown below,

The purple line makes an acute angle (less than 90 °) thus slope will be positive and the blue line makes an obtuse angle (greater than 90°) thus the slope is negative.

Hence "point (x₁,y₁) can be (2,5) and (x₂,y₂) could be (-7,5)".

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The process of finding the derivative of a function is called differentiation.

Differentiation is a fundamental concept in calculus that involves determining the rate at which a function changes with respect to its independent variable. It allows us to analyze the behavior of functions, such as finding slopes of curves, identifying critical points, and understanding the shape of graphs.

The derivative of a function represents the instantaneous rate of change of the function at any given point. It provides information about the slope of the tangent line to the graph of the function at a specific point.

The notation used to represent the derivative of a function f(x) with respect to x is f'(x) or dy/dx. The derivative can be interpreted as the limit of the difference quotient as the interval approaches zero, representing the infinitesimal change in the function.

By applying differentiation techniques, such as the power rule, product rule, chain rule, and others, we can find the derivative of a wide range of functions. Differentiation is a powerful tool used in various areas of mathematics, physics, engineering, economics, and other fields to analyze and solve problems involving rates of change.

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The no: of red disks Senja have is 62

In mathematics, an expression that incorporates variables, constants, and algebraic operations is known as an algebraic expression (addition, subtraction, etc.). Terms comprise expressions.

An expression constructed using integer constants, variables, and algebraic operations is known as an algebraic expression in mathematics (addition, subtraction, multiplication, division, and exponentiation by an exponent that is a rational number). A good example of an algebraic expression is 3x2 2xy + c.

The following relationships result from using r, g, and b to denote the numbers of red, green, and blue disks, respectively:

Since r + g + b = 105, there are 105 total disks.

r -g = 30 There are 30 more red than green cards than there are.

There are 21 more greens than blues, or g - b = 21.

The third equation can be used to replace b in the first equation.

The third equation for b is b = g -21.

When r + g + (g -21) = 105 is added to the first equation, the result is 105.

R + 2g = 126, which you may simplify by adding 21.

Now, we may substitute g in the equation we just wrote using the second equation.

G is represented by the second equation, g = r -30.

g and r are replaced by r +2(r -30) = 126 in our equation.

3r = 186, which may be simplified by adding 60.

When r = 62, divide by 3 to get the result.

62 red disks make up Senja.

Further commentary

g = 62 -30 = 32

b = 32 -21 = 11

Additionally, Senja contains 32 green and 11 blue disks.

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The value that could be a solution of the inequality -3h + 6 > 24 is -1, the correct option is D.

If the equation or inequality contains variable terms, then there might be some values of those variables for which that equation or inequality might be true. Such values are called solution to that equation or inequality. Set of such values is called solution set to the considered equation or inequality.

We are given that;

The inequality=-3h + 6 > 24

To solve the inequality, we can isolate the variable h on one side of the inequality by performing inverse operations. We want to get h by itself on one side, so we need to isolate the term with h on the other side.

-3h + 6 > 24

-3h > 18

h < -6

So any value less than -6 will be a possible solution to the inequality.

Therefore, the value that could be a possible solution for the given inequality is:

A. -5 (not less than -6)

B. -24 (less than -6)

C. 0 (not less than -6)

D. -1 (less than -6)

Therefore, by the given inequality the answer will be -1.

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The correct answer is option C which is the ratio of the numbers is 3:4.

In mathematics, ratios are used to determine the relationship between two numbers it indicates how many times is one number to another number.

Given that:-

As we can see that the numbers are more than 20% so suppose the third number is x so the increased number is 1.2x.

Similarly the second condition the increased number is 1.6x.

So the ratio of the numbers will be:-

Ratio = \(\dfrac{1.2x}{1.6x}\)

Ratio = \(\dfrac{3}{4}\)

Therefore the correct answer is option C which is the ratio of the numbers is 3:4.

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Answer:

take a time lapse video of yourself doing your homework on your phone! this way you won't be able to use your phone bc it will be doing the timelapse, and then after you finish you'll be able to go back and watch it :)

Step-by-step explanation:

Answer:

Make up a random doodle and name it bob.....YOU CAN DO THIS

Step-by-step explanation:

The minimum sterilization time required to achieve a 99.9% confidence level in successfully sterilizing 50 L of medium containing 10^6 contaminating organisms is approximately 1.95 minutes.

To calculate the minimum sterilization time required to yield 99.9% confidence of successfully sterilizing 50 L of medium containing 10^6 contaminating organisms, we need to use the concept of decimal reduction time (D-value) and the number of organisms.

The D-value represents the time required to reduce the population of microorganisms by one log or 90%. In this case, the given D-value is 0.65 minutes.

To achieve a 99.9% confidence level, we need to reduce the population of microorganisms by three logs or 99.9%, which corresponds to a 10^-3 reduction.

To calculate the minimum sterilization time, we can use the following formula:

Minimum Sterilization Time = D-value × log10(N0/Nf)

Where:

D-value is the decimal reduction time (0.65 minutes).

N0 is the initial number of organisms (10^6).

Nf is the final number of organisms (10^6 × 10^-3).

Let's calculate it step by step:

Nf = N0 × 10^-3

= 10^6 × 10^-3

= 10^3

Minimum Sterilization Time = D-value × log10(N0/Nf)

= 0.65 minutes × log10(10^6/10^3)

= 0.65 minutes × log10(10^3)

= 0.65 minutes × 3

= 1.95 minutes

Therefore, the minimum sterilization time required to yield 99.9% confidence of successfully sterilizing 50 L of medium containing 10^6 contaminating organisms using this procedure is approximately 1.95 minutes

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Answer: UHHHHH i shall halp ya

Step-by-step explanation:

if its 133 in ounces its 293.215 in pounds

Answer: 8 pounds and 5 ounces

Step-by-step explanation: Do 16 ounces divided by 2 and it will give you 8 or do 8 times 2 which will give you sixteen. I prefer you do the other way and then do 10 dividedy2to get 5 ounces. The cop is 2.

-56x+32

Hope this helps

Answer:

-8(7x-4)

-56x+32

Step-by-step explanation:

hdhjsjshkdkd

d

d

d

d

d

Answer: B She counted the squares instead of using the scale.

Step-by-step explanation: Just answered on Edgenuity and got it right

Answer:

b is right

Step-by-step explanation:

Answer:

P = 5

Step-by-step explanation:

Take the cube root of both sides, leaving P = 5.

-5 is not a possibility because -5 * -5 * -5 = -125 which is not 125. Therefore, the only real solution is P = 5.

Answer:

9 hours and 10 minutes

Answer:

8.50x \(\geq\) 348.50

41 hours

Step-by-step explanation:

x= amount of hours

Answer:122 days

Step-by-step explanation: