Mathematics College

When a number decreased by 10% the result in 63. What is the number?

Answers

Answer 1
The number is 69.3 because percent means 0.01, so 10 x 0.01 = 1.1
so 1.1 x 63 = 69.3. you can also do 63 x 10% = 69.3.
Answer 2

Final answer:

To find the number when decreased by 10%, set up an equation and solve for the number.

Explanation:

When a number decreased by 10% the result in 63. What is the number?

Let the number be x.

Equation: x - 0.10x = 63

Solve for x: 0.90x = 63 => x = 63 / 0.90 = 70

Related Questions

Ross and Gabby sold boxes of cookies for their soccer team fundraiser. Ross sold b boxes of cookies, and Gabby sold 35 boxes of cookies. Together they sold a total of 69 boxes of cookies.

Answers

Okay. So Rose and Gabby sold 69 boxes of cookies together and Gabby sold 35 of them. To find the amount Rose sold, let's set up an equation. 35 + b = 69. Let's subtract 35 from both sides. When you do that, you get that b = 34. Rose sold 34 boxes of cookies for their soccer team fundraiser.

Answer:

35 + b = 69

Step-by-step explanation:

is the answer on khan

What is the range for the set of data? 6, 7, 10, 12, 12, 13

Answers

range = 13 - 6 = 7

answer
7

there are 60 treats. he is allowed 2 treats a day. how many treats will he have left after 10 days?

Answers

2 x 10=20 60-20=40. 40 treats left

mike is buying a large pizza. the pizza cost $8.00 plus $1.00 for each additional topping

Answers

the pizza costs 8 dollars plus 1 dollar per additional toppings
additional toppings = x

1x + 8 is your expression

so if he has 10 toppings on the pizza, the pizza will cost 18 dollars

hope this helps

draw a rectangle give the length and the width to show that it has an area of 12cm make sure one side is longer than the other to show length and width

Answers

To find area, you multiply length * width. There are 4 sides on a number, so we need to have a equation like this. x * x * y * y = 12cm. If we do 4 * 4, we get 8. We could also use 2 * 2 = 4. 8 + 4 = 12. So, width = 8, and length = 4.

Hope this helps! ☺♥

The energy saved by recycling one glass bottle is enough to power a washing machine for 10 minuets. How many recycled glass bottles will it take to power a washing machine for one hour?

Answers

There are 60 minutes in one hour.
Divide 60 minutes by 10 minutes.

You get 6. That means you would need 6 recycled bottles to power a washing machine for one hour (that will be awesome if that were the case).

Have an awesome day! :)

A box with a square base of side z is 9 times higher than it is wide. Express the volume V of the box as a function of z

Answers

The width of the square base is z.
Because the height is 9 times higher than it is wide, the height is 9z.
The diagram below illustrates the problem.

The bolume is
V=z*z*(9z) = 9z³

Answer:  V = 9z³
Attached a solution and showed work.

Notebooks costs 1.20 each. This weekend they will be on sale for $0.80. What percentage is the sale

Answers

so, if we take 1.20 to be the 100%, what is 0.80 off of it anyway?

[tex]\bf \begin{array}{ccll} amount&\%\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ 1.20&100\\ 0.80&p \end{array}\implies \cfrac{1.20}{0.80}=\cfrac{100}{p}\implies p=\cfrac{0.80\cdot 100}{1.20}[/tex]

Arianna runs up 4 flights of stairs and then runs down 4 flights of stairs. Does this situation represent additive inverses?

Answers

Yes this represents additive inverse,

 Since you are subtracting the same number 4 to get to zero.

The additive inverse of a number is simply the negation of the said number.

The given situation is an illustration additive inverse.

Given that:

[tex]Runs \ up = 4\ stairs[/tex]

[tex]Runs \ down = 4\ stairs[/tex]

Let:

[tex]x \to up[/tex]

[tex]y = down[/tex]

When Arianna runs up, we have:

[tex]x = Runs\ up[/tex]

[tex]x = 4[/tex]

When Arianna runs down, we have:

[tex]y = -Runs\ down[/tex] ---- the minus indicates a downward movement

So, we have:

[tex]y = -4[/tex]

The additive inverse of a number n is -n

E.g. The additive inverse of 7 is -7

By comparing x and y, we have:

[tex]y =-x[/tex] and [tex]x = -y[/tex]

Hence, the situation represents additive inverse.

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Give an example of when you would make a frequency table to solve a problem.

Answers

You will use a graph like first to help ounderstand proportional fractions

You can use it when like confirming a policy. You can use it when like confirming a policy.

(4x6) x 3 = 4 x (3x6)

Answers

This is the associative property (because of the parenthesis)

hope this helps

An art supply store sells posters for $9 each and pictire frames for $15 each

a.write an expression for the total cost of 6 posters and 6 frames

B. What is the total cost for 6 framed posters?

Answers

Since posters cost 9 dollars each and picture frames cost 15, it would be multiplication.

The expression would be 9(6)+15(6) or 9x6+15x6.

You have to multiply these numbers. 9 times 6 would be 54. 15 times 6 would be 90.

Now, we need to add these together. 54 plus 90 would be 144.

The total cost for 6 framed posters would be $144.

What's the answer for this

Answers

For the polynomial 2x^3 - 3x^2 + 2x - 13, the coefficients are 2, -3, 2, -13. Write them in a single row. Place the test root 3 to the left and in its own box.

If you perform the synthetic division, you'll get what you see in the attached image. 

The final answer is  [tex]2x^2+3x+11+\frac{20}{x-3}[/tex]

Note: the quotient is 2x^2+3x+11; the remainder is 20. The remainder is found by the last item in the bottom row. The coefficients of the quotient are the remaining other values in the bottom row. 


In the first half (distance) of a trip, a truck travels at a speed of 70 km/hr. How fast must it go during the second half of the trip to average 80 km/hr for the entire trip? km/hr

Answers

Final answer:

To average 80 km/hr for the entire trip, the truck must go at a speed of 80 km/hr during the second half of the trip.

Explanation:

To find out how fast the truck must go during the second half of the trip to average 80 km/hr for the entire trip, we can use the concept of average speed. Average speed is calculated by dividing the total distance traveled by the total time taken.

Let's assume the entire trip is made up of two equal halves. In the first half, the truck travels at a speed of 70 km/hr. So, if we consider the distance traveled in the first half to be 'd', the distance traveled in the second half will also be 'd'.

Therefore, the total distance traveled for the entire trip is 2d. Now, to average 80 km/hr for the entire trip, we can use the formula:Average speed = Total distance / Total time

80 km/hr = 2d / Total time

Since the time taken for the first half is the same as the time taken for the second half, we can represent the total time as '2t', where 't' is the time taken for each half.

Substituting the values, we have:80 km/hr = 2d / (2t)

Cancelling out the common factors, we get:80 = d / t

Since the distance traveled in the first half is 'd' and the time taken for the first half is 't', the speed during the second half must be '80' km/hr to average 80 km/hr for the entire trip.

Parallelogram ABCD ​ is a rectangle.



AC=2y+7

BD=3y−4



What is the value of y?

Enter your answer in the box.

Answers

The correct answer is y = 11

because:
2y + 7 = 3y − 4
−y + 7 =−4

Subtract 7 from both sides.
−y + 7 − 7 = − 4 − 7
−y = −11

Divide both sides by -1.
y = 11

Answer:

y = 11

Step-by-step explanation:

~Solve~

Let's solve your equation step-by-step.

2y+7=3y−4

Step 1: Subtract 3y from both sides.

2y+7−3y=3y−4−3y

−y+7=−4

Step 2: Subtract 7 from both sides.

−y+7−7=−4−7

−y=−11

Step 3: Divide both sides by -1.

−y

−1

=

−11

−1

y=11

Answer:

y=11

B) there is a line with positive slope that is tangent to both circles. find the equation of this line, and (c) determine the points at which this tangent line touches each circle

Answers

Given that there is a line with positive slope that is tangent to both circles [tex]x^2 + y^2 = 1[/tex] and [tex](x-3)^2 + y^2 = 4[/tex].

Let the point of tangency in the first circle be (a, b) and the point of tangency in the second circle be (c, d), then the slope of the tangent to the first circle is given by

[tex]2x+\left.2y \frac{dy}{dx}\right|_{(a, b)} =0 \\ \\ \Rightarrow \left.\frac{dy}{dx}\right|_{(a, b)} =- \frac{x}{y} =- \frac{a}{b} [/tex]

and the slope of the second circle is given by

[tex]2(x-3)+\left.2y \frac{dy}{dx}\right|_{(c, d)} =0 \\ \\ \Rightarrow \left.\frac{dy}{dx}\right|_{(a, b)} =- \frac{x-3}{y} =- \frac{c-3}{d}[/tex]

From the first circle equation, we have

[tex]x^2 = 1 - y^2 \\ \\ \Rightarrow a^2 = 1 - b^2[/tex]

and from the second equation, we have

[tex](x-3)^2 = 4 - y^2 \\ \\ (c-3)^2 = 4 - d^2[/tex]

Since the two slopes above are for the same line, then

[tex] \frac{a}{b}= \frac{c-3}{d} \\ \\ \Rightarrow ad=b(c-3) \\ \\ \Rightarrow a^2d^2=b^2(c-3)^2 \\ \\ \Rightarrow(1-b^2)d^2=b^2(4-d^2) \\ \\ \Rightarrow d^2-b^2d^2=4b^2-b^2d^2 \\ \\ \Rightarrow d^2=4b^2 \\ \\ \Rightarrow d=\pm2b[/tex]

Thus, we have

[tex] \frac{a}{b}= \frac{c-3}{2b} \\ \\ \Rightarrow a= \frac{c-3}{2} [/tex]

Is it possible for a linear function and an exponential funtion to have the indicated number of intersection?

Answers

Which "indicated number of intersection(s)?"


A linear function and an exponential function can have zero, one or two intersections.  Try graphing y=e^2 and y=x+2 on the same set of axes.

What, exactly, are you hoping to learn here?

Give your answer as a reduced proper or improper fraction 16/25 +-3/10

Answers

The correct answer would be 17/50 because you have to make the 2 bottom numbers the same.
16/25 and -3/10 must become 34/50 and -15/50. and since 15/50 is negitive this is basically a subtraction problem. so 34/50 - 15/50 = 19/50.and 19 cant divide so the answer is 19/50.

Is 0.8 greater than 0.64

Answers

Yes, 0.8 is greater than 0.64 by 0.16

hope this helps
0.8 is greater because there is a 0 after the 8 which means it’s is 0.80

Is the product of two mixed number less than, between,or greater than the two factors?explain

Answers

The product of two mixed numbers is greater than the two factors (assuming that the two numbers are positive and greater than or equal to 1).
To better understand this, let's take as an example the multiplication of 1.5 and 2.25.
Both are mixed numbers, their multiplication is as follows:
1.5 * 2.25 = 3.375
The two factors here are 1.5 and 2.25 and the product is 3.375 which is greater than the factors

Suppose a fair die is rolled eight times. find numerical values for the expectation

Answers

your possiblity is 1/6 then you multiply that by tries
so 1/6 ×8

Margo borrows $600, agreeing to pay it back with 4% annual interest after 18 months. How much interest will she pay?

Answers

Final answer:

Margo will pay $36 in interest after borrowing $600 with a 4% annual interest rate for 18 months. We calculate this using the simple interest formula.

Explanation:

The question is asking us to figure out how much interest Margo will pay after borrowing $600 with a 4% annual interest rate, or simple interest rate, over the course of 18 months. A core concept here is understanding how simple interest is calculated.

The simple interest formula we'll be using is: Interest = Principal x Rate x Time.  The Principal is the amount of money initially borrowed, Rate is the annual interest rate (in decimal form), and Time is the length of time the money is borrowed for, expressed in years.

So in Margo's case, the Principal is $600, the Rate is 4% (or 0.04 in decimal form), and Time is 18/12 or 1.5 years, because 18 months is equal to 1.5 years.

When we apply these amounts to the formula we get: Interest = $600 x 0.04 x 1.5, which equals $36. So Margo will pay $36 in interest.

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What effects does adding a constant have to an exponential function?

Answers

It depends where you introduce constant 

Exponential function: f(x) = e^x 

y = e^x + c ----> shift function up c units 
y = e^(x−c) ----> shift function right c units 
y = e^(cx) ------> dilates function horizontally by factor of 1/c 
y = c e^x -------> dilates function vertically by factor of c

If ∠A and ∠B are supplementary angles and m∠A = 3m∠B, find m∠A and m∠B.

Answers

∠A and ∠B are supplementary so that means they have a sum of 180°.
m ∠A=3(m ∠B) and m ∠B=?

m ∠A + m ∠B=180°
3 (m ∠B) + m ∠B=180°
4 m ∠B=180°
4/4 m ∠B=180°/4
m ∠B=45° and m ∠A=3(m ∠B)=3 (45)=135°
Final answer:

To find the measures of angles ∠A and ∠B, we can use the fact that they are supplementary angles and the given relationship between their measures. By solving a system of equations, we can determine that m∠A is 135 and m∠B is 45.

Explanation:

To find the measures of the angles ∠A and ∠B, we need to use the fact that they are supplementary angles and the relationship between their measures. Let's start by understanding what supplementary angles are.

Supplementary angles are two angles that add up to 180 degrees. In this case, ∠A and ∠B are supplementary, so we can write the equation:

m∠A + m∠B = 180

We are also given that the measure of ∠A is three times the measure of ∠B, so we can write another equation:

m∠A = 3m∠B

Now we can substitute m∠A in the first equation with 3m∠B:

3m∠B + m∠B = 180

Combining like terms, we get:

4m∠B = 180

Finally, we can solve for m∠B by dividing both sides of the equation by 4:

m∠B = 45

Since m∠A is three times m∠B, we can find m∠A by multiplying 45 by 3:

m∠A = 135

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The Leukemia and Lymphoma Society sponsors a 5K race to raise money. It receives $55 per race entry and $10,000 in donations, but it must spend $15 per race entry to cover the cost of the race. Write and solve an inequality to determine the number of race entries the charity needs to raise at least $55,000.

Answers

Donations = $10,000
Revenue = $55 per race enry
Expense = $15 per race entry
Budget ≥ $55,000

Let x =  the number of race entries.
Total revenue = Donations + Race entries - Expenses
Therefore
10000 + 55x - 15x ≥ 55000
40x ≥ 45000
x ≥ 1125

Answer: Race entries ≥ 1125


ANSWER FAST
Marshall bought some pet supplies for $15. The sales tax was 6%. He wrote the expression 1.06(15) to find his total cost.

Which equivalent expression could he also use to find the total cost?

A. 15+0.6(15)
B. (1+0.06)15
C. 1+0.06(15)
D.15 + 0.06

Answers

A. 15+0.6(15)
I hope that helps you out.8/

What is the correct order of the following numbers? -17/10, -2, -(1.2)2

Answers

-(1.2)2 , -2 , -17/10

Answer:

The correct order from least to greatest is: [tex]\(-2\), \(-1.7\), \(-1.44\).[/tex]

Explanation:

To determine the correct order of the given numbers, let's first simplify them:

1. [tex]\(-\frac{17}{10}\)[/tex]  is equivalent to [tex]\(-1.7\).[/tex]

2. [tex]\(-2\)[/tex] remains as is.

3. [tex]\(-(1.2)^2 = -1.44\), as \(1.2^2 = 1.44\)[/tex]  and the negative sign is applied.

Now, we have:

1. [tex]\(-1.7\)[/tex]

2. [tex]\(-2\)[/tex]

3. [tex]\(-1.44\)[/tex]

So, the correct order from least to greatest is: [tex]\(-2\), \(-1.7\), \(-1.44\).[/tex]

a number cube is rolled and a coin is tossed. What is the probability of rolling a 5 and tossing tails

Answers

rolling a 5 is a 1/6 probability

 tossing tails is a 1/2 probability

 doing both is a 1/6 * 1/2 = 1/12 probability

a cleaning service order 7 large bottles and 5 small bottles of cleaning products each large bottle has 122 Oz each small bottle has 68 Oz which is the best estimate of the total amount of cleaning products that cleaning service orders

Answers

Final answer:

The best estimate of the total amount of cleaning products that the cleaning service orders is 1,194 Oz.

Explanation:

To find the best estimate of the total amount of cleaning products that the cleaning service orders, we need to calculate the total amount of cleaning products in the large bottles and small bottles separately and then add them together.

Each large bottle has 122 Oz, and the cleaning service orders 7 of them. So the total amount of cleaning products in the large bottles is 7 x 122 = 854 Oz.

Each small bottle has 68 Oz, and the cleaning service orders 5 of them. So the total amount of cleaning products in the small bottles is 5 x 68 = 340 Oz.

To get the best estimate of the total amount of cleaning products, we add the amounts in the large bottles and small bottles together: 854 + 340 = 1,194 Oz.

write the converse of the conditional statement determine weather the converse is true of false if it is false find a counter example if you are 14 years old then you are a teenager

Answers

Condition: p --> q
If you are 14 years old then you are a teenager.

Converse q --> p
If you are a teenager then you are 14 years old.
False, because you can be a 13, 15, 16,17, 18 year old teenager.

Final answer:

The converse of the conditional statement "If you are 14 years old then you are a teenager" is true. If someone is a teenager, it implies that they are at least 14 years old.

Explanation:

The converse of the conditional statement "If you are 14 years old then you are a teenager" is:

If you are a teenager then you are 14 years old.

The converse statement is true because if someone is a teenager, it implies that they are at least 14 years old. However, it does not guarantee that someone who is 14 years old is necessarily a teenager, as there are other age groups within the teenage years.

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