A price that is regularly $81 was reduced by 55%.

Answer:

0.1187

Step-by-step explanation:

A = P (1 + k)^t

where A is the final amount,

P is the initial amount,

k is the monthly growth rate,

and t is the number of months.

70 = 50 (1 + k)^3

1.4 = (1 + k)^3

∛1.4 = 1 + k

k = -1 + ∛1.4

k = 0.1187

According to the 2019 report Canada's Changing Climate Report (CCCR) which was commissioned by Environment and Climate Change Canada, Canada's annual average temperature over land has warmed by 1.7 C since 1948. The rate of warming is even higher in Canada's North, in the Prairies and northern British Columbia

L=4*W-5

10=W*2+(4*W-5)*2

10=W*2+8*W-10

20=10*W

2=W

L=4*2-5

L=3

Answer:

B, 9.625

Step-by-step explanation:

I know there's a more surefire method of doing this problem but since this is multiple choice, you can use process of elimination to solve it.

Answer:

9 = [tex]3^{x}[/tex]

Step-by-step explanation:

Using the rule of logarithms

[tex]log_{b}[/tex] x = n ⇔ x = [tex]b^{n}[/tex]

Given

[tex]log_{3}[/tex] 9 = x ⇔ 9 = [tex]3^{x}[/tex] ← in exponential form

Answer:

its A on edge

Step-by-step explanation:

Answer:

The rate of change for each reader is :

For J K Rowling :  17 and a half pages per hour

For R L Stone :  15   pages  per hour

Step-by-step explanation:

Here the reading rate of each reader is given as:

J.K. Reads 35 pages every 2 hours.

So, the number of pages read by J K  in 2 hours  = 35 pages

⇒ The number of pages read per hour  =  35 / 2  = 17 . 5 pages

So, the pages read by J K Rowling in 1 hour is 17 and a half pages.

R L Stone reads 45 pages every 3 hours.

So, the number of pages read by R L  in 3 hours  = 45 pages

⇒ The number of pages read per hour  =  45 / 3  = 15 pages

So, the pages read by R L Stone in 1 hour is 15 pages.

Hence, the rate of change for each reader is :

For J K Rowling :  17 and a half pages  per hour

For R L Stone :  15   pages  per hour

Mr Lee drive 31 miles from his house to Brookville and there is an extra information that is parkside is 4 miles south of springfield which is not required.

Given that  

Mr. Lee drove 8 miles from his house to park side .  

Parkside is 4 miles south of springfield.

From Parkside he drove 3 miles to springdale  

Then he drove 20 miles from springdale to brookville.

Need to determine how far Mr Lee drive in all, from his house to Brookville.

Also need to identify Extra or missing information.

Complete drive of Mr Lee from his house to Brookville is equal to 8 miles from his house to park side then 3 miles from Parkside to springdale , then 20 miles from springdale to brookville.

=> Complete drive of Mr Lee from his house to Brookville in miles = 8 + 3 + 20 = 31 miles

Information that is parkside is 4 miles south of springfield is extra information which is not required to determine mr. Lee drive , from his house to Brookville .  

Hence Mr Lee drive 31 miles from his house to Brookville and there is an extra information that is parkside is 4 miles south of springfield which is not required.

x+y=64 and x-y=16 can be used to solve the system.

Step-by-step explanation:

Let,

x,y be the two shirts.

According to given statement;

Bob spent $64 on both shirts;

x+y=64    Eqn 1

The difference between the costs of the shirts was $16 means subtraction;

x-y=16      Eqn 2

x+y=64 and x-y=16 can be used to solve the system.

Keywords: linear equation, addition

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Answer:

The cost of the shirts are $40 and $24

Step-by-step explanation:

Let

x ----> the cost of one shirt

y ----> the cost of the other shirt

we know that

[tex]x+y=64[/tex] ----> equation A

I assume that the cost x is greater than the cost y

so

[tex]x-y=16[/tex] ----> [tex]x=y+16[/tex] ---> equation B

solve the system by substitution

substitute equation B in equation A

[tex]y+16+y=64[/tex]

solve for y

[tex]2y=64-16[/tex]

[tex]2y=48[/tex]

[tex]y=\$24[/tex]

Find the value of x

[tex]x=y+16[/tex] ---->  [tex]x=24+16=\$40[/tex]

therefore

The cost of the shirts are $40 and $24

Answer:

Step-by-step explanation:

sin67° = 12/13

Answer:

The slope of the table is [tex]m=\frac{5}{2}[/tex]   or  [tex]m=2.5[/tex]

Step-by-step explanation:

we know that

The formula to calculate the slope between two points is equal to

[tex]m=\frac{y2-y1}{x2-x1}[/tex]

we have the following ordered pairs

(2,6),(0,1),(-2,-4) and (-4,-9)

take two points

(2,6) and (-4,-9)

substitute in the formula

[tex]m=\frac{-9-6}{-4-2}[/tex]

[tex]m=\frac{-15}{-6}[/tex]

simplify

[tex]m=\frac{5}{2}[/tex]

Answer:

C) Side SW

Step-by-step explanation:

Hello! The included side between <S and <W is side SW. According to the included side rule, this would be the correct answer. I know this is not much of an explanation, but there is not much to it! Hope this helps.

Answer:

A) 1/4 min

Step-by-step explanation:

Find the equation for the graph:

y = mx + b

Find the slope using two random points (0, 360) and (5, 0)

m = (y2 - y1) / (x2 - x1)

m = (0-360) / (5-0)

m = -360/5

m = -72

b is 360, the y-intercept.

Substitute m= -72 and b=360 into slope-intercept form.

y = -72x + 360

x represents time and y represents the total amount of water at the time.

We are looking for when only 18 liters were drained.

360 - 18 = 342  <= Total amount of water when 18 liters are drained

Substitute 342 for y in the equation and isolate x.

342 = -72x + 360

-18 = -72x

x = 18/72

x = 1/4

Therefore, it will take 1/4 of a minute to drain 18 liters.

Answer: 1/4

Step-by-step explanation:

I got it right on khan academy.

Hope this helps

Answer:

Simple interest = PRT/100

1380 = P x 12 x 2/100

138000 = 24P

Therefore P = 5750 Rs.

Hope this helps!

To find the principal amount given the simple interest, rate, and time, use the formula P = SI / (R × T). Substituting the values, the principal amount is 5750 rupees.

To find the sum of money (principal) using the given simple interest, we can use the simple interest formula:

Simple Interest (SI) = Principal (P) × Rate (R) × Time (T)

Here, we know that:

Rearranging the formula to solve for the principal (P):

[tex]P = \frac{SI }{(R * T)}[/tex]

Substitute the known values:

P = 1380 / (0.12 × 2)

Solving the equation:

P = 1380 / 0.24

P = 5750 rupees

Therefore, the sum of money is 5750 rupees.

Independent. Two events are dependent if knowing the result of the first one influences what you'd expect from the second.

Consider this example: if I have a sack with 3 black marble and 1 white marble, I have probability 75% of picking a blakc marble, and 25% of picking the white one.

If I pick the white one, and don't replace, the second pick will be dependent on the first one, because now I'm sure that I'll pick one of the black marbles, since they are the only ones left in the sack.

In your example, though, Wendy replaces the marble she picks first. This means that the second pick will take place in the exact same conditions of the first one, and knowing which marble she picked at first doesn't affect in any way the result of the second pick.

As another example, consider rolling two dice. Suppose that the first die lands showing 4. Does this affect in any way what you'd expect from the second die? Well, no: the numbers 1-6 are still equally probable to show up.

Answer:

a) $13588.08

b) $688.08

Step-by-step explanation:

Melissa had to purchase $12,900 worth of machinery for her business.

She made a down payment of $2100 and after that made monthly payments of $478.67 for the business loan for the rest.

Given that after years of paying monthly payments of $478.67, she finally paid off the loan.

Assume that she took 2 years to repay the loan.

a) Therefore, the total amount Melissa ended up paying for the machinery was $[2100 + (478.67 × 24)] = $13588.08 (Answer)

b) Therefore, the amount of interest that Melissa pay on the loan is $(13588.08 - 12900) =$688.08. (Answer)

Answer:

50 Apples

Step-by-step explanation:

10x2=20 tomatoes

10x5=50 apples

Answer:

50 apples

Step-by-step explanation:

well the ratio of tomatoes to apples is 2:5

so if you have 20 tomatoes times 5 apples by ten to get the answer

2 x 10 = 5 x 10

Answer:

Step-by-step explanation:

B

Answer:

Here's the answer. I got it right on my quiz. Hope I could help:)

Answer:

10 square root over 30

Step-by-step explanation:

took the test

The right answer is Option B.

Step-by-step explanation:

Given expression is;

5x√2 - 3√2 + x√2

We can add or subtract square roots only when the values inside the square root are same and the variables are also same.

In the given expression, variable x is same with √2, therefore, adding both the roots

[tex]6x\sqrt{2} -3\sqrt{2}[/tex]

6x√2 - 3√2 is equivalent to 5x√2 - 3√2 + x√2.

The right answer is Option B.

Keywords: square roots, subtraction

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Answer:

Infinitely many solutions.

Step-by-step explanation:

10+x=5(1/5x+2)

10+x=x+10

infinitely many solutions

The equation 10+x=5(1/5x+2) has an infinite number of solutions.

To solve the equation 10+x=5(1/5x+2), we need to simplify both sides and then isolate the variable x. Let's start by distributing the 5 to the terms inside the parentheses.

10+x = 5(1/5x+2) becomes:

10+x = 1x+10

Next, we can combine like terms on each side of the equation. Subtracting x from both sides:

10 = x+10-x

The x terms cancel out, leaving us with:

10 = 10

This equation is always true, which means that there are an infinite number of solutions.

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The complete Question is given below

10+x=5(1/5x+2)

Determine whether it has one solution, an infinite number of solution, or no solutions

Answer:

12 and 8

Step-by-step explanation:

12 + 8= 20

12 x 8= 96

The two numbers are 12 and 8. They have a sum of 20 and a product of 96, satisfying the given conditions.

To find two numbers whose sum is 20 and whose product is 96, we can set up a system of equations. Let's call the two numbers x and y.

1. The first equation represents their sum:

  x + y = 20

2. The second equation represents their product:

  xy = 96

Now, we need to solve this system of equations. One way to do it is by substitution. From the first equation, we can express y in terms of x: y = 20 - x.

Now, we substitute this expression for y into the second equation:

x(20 - x) = 96

Expanding and simplifying this equation:

20x - x^2 = 96

Rearranging terms:

x^2 - 20x + 96 = 0

Now, we factor the quadratic equation:

(x - 12)(x - 8) = 0

This gives us two possible solutions for x: x = 12 and x = 8.

So, the two pairs of numbers that satisfy the conditions are (12, 8) and (8, 12). In both cases, the sum of the numbers is indeed 20, and their product is 96, as required.

In summary, the two numbers are 12 and 8, and they meet the criteria of having a sum of 20 and a product of 96. These solutions demonstrate how algebraic techniques can be used to solve real-world problems involving unknown values.

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Answer:

Step-by-step explanation:

[tex]\dfrac{1}{3}x<3x+8<-5x\qquad\text{multiply all sides by 3}\\\\3\!\!\!\!\diagup^1\cdot\dfrac{1}{3\!\!\!\!\diagup_1}x<3\cdot3x+3\cdot8<3\cdot(-5x)\\\\x<9x+24<-15x\\\\\text{Let split it into two inequalities}\\\\(1)\qquad x<9x+24\ \text{and}\qquad (2)\qquad 9x+24<-15x[/tex]

[tex](1)\\x<9x+24\qquad\text{subtract}\ 9x\ \text{from both sides}\\\\-8x<24\qquad\text{change the signs}\\\\8x>-24\qquad\text{divide both sides by 8}\\\\\boxed{x>-3}\\\\(2)\\9x+24<-15x\qquad\text{add}\ 15x\ \text{to both sides}\\\\24x+24<0\qquad\text{subtract 24 from both sides}\\\\24x<-24\qquad\text{divide both sides by 24}\\\\\boxed{x<-1}\\\\\text{From (1) and (2) we have}\\\\-3<x<-1\to\text{There is only one integer in this solution: -2}[/tex]

Answer:

6x - 3

Step-by-step explanation:

Distribute first.

4x + 6x - 3 - 4x = 10x - 4x - 3 = 6x - 3

The equivalent expression for 4x + 3(2x - 1) - 4x is 6x - 3, achieved by distributing the multiplier in the parenthese and then combining like terms.

The expression 4x + 3(2x - 1) - 4x can be simplified by first distributing the 3 in the term 3(2x - 1), then combining like terms.

1. Distribute the 3 to get : 4x + 6x - 3 - 4x

2. Combine like terms: 6x - 3

So, the equivalent expression of 4x + 3(2x - 1) - 4x is 6x - 3

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Answer:

2x³ - 2

Step-by-step explanation:

Each term in the second factor is multiplied by each term in the first factor, that is

= x(2x² + 2x + 2) - 1(2x² + 2x + 2) ← distribute both parenthesis

= 2x³ + 2x² + 2x - 2x² - 2x - 2 ← collect like terms

= 2x³ - 2

50 gallons of water leaked out of swimming pool.

Step-by-step explanation:

Total no. of gallons in swimming pool = 1000

Percentage of leaked water = 5%

Gallons of water leaked = 5% of total no. of gallons

[tex]Gallons\ of\ water\ leaked=\frac{5}{100}*1000\\\\Gallons\ of\ water\ leaked=\frac{5000}{100}\\\\Gallons\ of\ water\ leaked= 50\ gallons[/tex]

50 gallons of water leaked out of swimming pool.

Keywords: percentage, division

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Answer:

True

Step-by-step explanation:

This is true because there is no common factor for 7 annd 9

Answer:

c)1200

Step-by-step explanation:

Given: Students were packed shoulder to shoulder in a gym for a pep rally. The students were in a rectangular shaped area of [tex]7500[/tex] ft.

To Find: If each student on average took up a circular space with a diameter of [tex]2.5[/tex] ft what is the best estimate for the number of  students at the pep rally.

Solution:

Consider the figures attached

A student took up a circular space, if they were packed in rows each student acquired a circular space of [tex]2.5[/tex] ft and left some unused area as given in figures

Now,

Area acquired by a student is a square of side [tex]2.5[/tex] ft as given in figure

Area acquired by single student[tex]=(\text{length of square})^2[/tex]

                                                     [tex]=2.5\times2.5[/tex]

                                                     [tex]6.25\text{sq.ft}[/tex]

Total number of students            [tex]=\frac{\text{total area of rectangular gym}}{\text{area acquired by single student}}[/tex]

                                                     [tex]\frac{7500}{6.25}[/tex]

                                                     [tex]1200[/tex]

there are approximately [tex]1200[/tex] students in gym hence option b is correct.

Final answer:

The projectile takes 1.22 seconds to reach its maximum height.

Explanation:

To find the time it takes for the projectile to reach its maximum height, we can use the equation:

where t is the time, v_f is the final velocity, v_i is the initial velocity, and a is the acceleration.

In this case, the initial velocity is 12.0 m/s and the acceleration is -9.8 m/s² (negative because the projectile is moving upward). Since the final velocity at the maximum height is 0 m/s, we can substitute the values into the equation:

t = (0 - 12.0) / -9.8 = 1.22 seconds

Therefore, it takes 1.22 seconds for the projectile to reach its maximum height.

Answer:

Step-by-step explanation:

[tex]8n=24[/tex]           divide both sides by 8

[tex]\dfrac{8n}{8}=\dfrac{24}{8}[/tex]

[tex]n=3[/tex]

Check:

[tex]8(3) = 24[/tex]

[tex]24=24[/tex]              CORRECT

Answer:

n=3

Step-by-step explanation:

8n=24

24 divided by 8

=3

the n is left behind so you r left with n =3