Mathematics High School

One number is 3 more than twice another number. if the sum of two number is 39, find the two numbers

Answers

Answer 1

X=3+2y
X+y=39
3+2y+y=39
3y=39-3=36
Y= 12,x= 3+2*12=27

Answer 2

(X+3)^2-x^2=39 x^2+6X+9-x^2=39 6x+9=39. 6x=30 x =5 x+3=8

Related Questions

HELP
IMPORTANT 20 POINTS

Answers

volume of tub = 20 *10*10 = 2000cm^3

2000*1/16 = 2000/16 = 125 cubic cm of ice scream left

volume of sphere = 4/3*3.14*3^2 = 37.68 / 2 = 18.84

volume of cone = 18.84

18.84 = 1/3 *3.14*r^2*h

18.84 = 9.42*h

h = 18.84 / 9.42 = 2.00 inches tall

∠E and ∠F are vertical angles with m∠E=8x+8 and m∠F=2x+38 . What is the value of x? Enter your answer in the box.

Answers

Set the two measures equal to each other. Subtract 2x from both sides and subtract 8 from both sides. Leaving you with 6x=30. Then divide 30/6 and you get X=5

Answer:

x = 5

Step-by-step explanation:

We need to remember that vertical angles are opposite to each other when two lines cross. The vertical angles that result from two lines crossing have the same measure.

In this problem we have angle E which measures 8x + 8 and angle F which measure 2x + 38.

Since they are vertical angles, we know that they have the same measure and therefore we can equal them both and solve for x:

[tex]8x+8=2x+38\\8x-2x=38-8\\6x=30\\x=5[/tex]

Therefore, x = 5 (and ∠E = ∠F = 48)

With calculations please

Answers

5) x represents the widgets; y represents the gadgets

Widgets are $3 each ; gadgets are $5 each.

The boss wants AT LEAST 10 widgets and 20 gadgets and total must reach AT MOST $300 per day.

Your inequalities would be:

x ≥ 10 (there must be greater than or equal to 10 widgets made)

y ≥ 20 (there must be greater than or equal to 20 gadgets made)

3x + 5y ≤ 300 (the cost must be less than or equal to 300)

The solution is H.

6) Solve for all possibilities.

I) f(k) + g(k)

= -4k⁴ + 14 + 3k² + (-3k⁴ - 14k² - 8)

= -4k⁴ + 14 + 3k² - 3k⁴ - 14k² - 8

Combine like terms.

= -7k⁴ - 11k² + 6

II) h(k) - r(k)

= 8k⁴ - 3 - 10k² - (-k² + 12k⁴ + 6)

= 8k⁴ - 3 - 10k² + k² - 12k⁴ - 6

= -4k⁴ - 9k² - 9

III) s(k) - t(k)

= -3k⁴ + 5k² - 1 - (4k⁴ + 16k² - 7)

= -3k⁴ + 5k² - 1 - 4k⁴ - 16k² + 7

= -7k⁴ - 11k² + 6

There are only two that result in equivalent expressions which are I and III.

Solution : I and III.

Branliest offered
Decide which of the two points on the graph of the line
X=0
A. 0,7
B. -4,0

Answers

A. 0, 7 is your answer

hope this helps

You claim to have a magic coin that will land on heads whenever you want. Your friend dares you to prove it by tossing 4 heads in a row. Assuming the coin is fair, what is the probability that your magic will fail?
A) 50%
B) 62.5%
C) 75%
D) 93.75%

Answers

A. 93.75%

because every time you flip it, you lose half the chance for it to land on heads

50%-75%-93%

The correct answer would be
D) 93.75%

Which expression can be used to change 75 kilometers per hours to meters per minute?

Answers

The fractions you use must be the correct conversion factors.

1 km = 1000 m, so you can have the fraction (1 km)/(1000 m) or the fraction (1000 m)//(1 km). You must choose the correct one for this problem.

1 hr = 60 min, so you can have the fraction (1 hr)/(60 min) or the fraction (60 min)/(1 hr). Again, you must choose the correct one for this problem.

The important thing is to choose the correct fraction from the choices.
How do you know which conversion fractions to use?
You look at the given units and the units you want.
You must pick the conversion fraction that will cancel out the units you DON'T want, leaving the units you want.

You have a speed in km/hr.
km is in the numerator. To cancel out km, you must pick the conversion fraction that km in the denominator.
hr is in the denominator. To cancel out hr, you must pick the fraction that has hr in the numerator.

[tex]75 \frac{km}{hr} \times \frac{1000~m}{1~km} \times \frac{1~hr}{60~min} [/tex]

Notice that km and km cancel out leaving m.
Also, hr and hr cancel out leaving min.

Find the measure of angle e.
A. 70°
B. 130°
C. 100°
D. 110°

Answers

Knowing about corresponding angles, we know that m∠d = 70°.

The sum of the measures of the angles d and g is equal to 180°. Or in other words, they are supplementary.

Knowing this, we can use algebra to build an equation and solve for g.

70° + m∠g = 180°
m∠g = 110°

And finally, using the knowledge of vertical lines, ∠g is complementary to ∠e.

So, m∠e is equal to 110°.

He _______ tells us that for a population with any distribution, the distribution of the sample means approaches a normal distribution as the sample size increases.

Answers

He Sampling method tells us that for a population with any distribution, the distribution of the sample means approaches a normal distribution as the sample size increases.

The Central Limit Theorem tells us that for a population with any distribution, the distribution of the sample means approaches a normal distribution as the sample size increases. In practice, the distribution of the sample means approaches a bell-shape curve when n > 30. More specifically speaking, if a random variable X has a mean of µ and a standard deviation of σ, then the sample means are approximately normally distributed with a mean of µ and a standard deviation of [tex] \frac{\sigma}{ \sqrt{n} } [/tex] as the sample size increases.

In triangle XYZ, m∠Z > m∠X + m∠Y. Which must be true about △XYZ?

Answers

it must be an obtuse triangle

A regular 40-sided polygon is rotated with its center of rotation at its center. What is the smallest degree of rotation needed to map the polygon back on to itself?

Answers

hey! the answer would be A regular 40-sided polygon has an interior angle equal to:
(40 - 2) (180) /40 = 171 degrees

The interior angle is also the smallest angle that is needed to rotate the polygon and map it unto itself. So, the smallest degree of rotation needed to map the polygon back to itself is 171 degrees.

Answer:

9 degrees

Step-by-step explanation:

i dont know what the other guy is talking about, its 360/40=9

So I’m doing test corrections and I need help on the problem

Answers

The answer is: " w ^(-2/9) " .
_________________________________________
Note: [w^(-4/3) ] ^ (1/6) = w ^ [ (-4/3) * (1/6) .
_________________________________________
(-4/3) * (1/6) = (-4 * 1) / (3 * 6) = -4 / 18 = (-4÷2) / (18÷2) = -2/9 ;
_________________________________________

So; [w^(-4/3) ] ^ (1/6) =
_________________________________________
w ^(-2/9) .
_________________________________________

What is the value of x?

a. -16
b. 120
c. 60
d. 16

Answers

D is the answer to your question

Vertical angles are congruent or equal to each other.

Set the equation:

8x - 8 = 7x + 8

Add 8 to both sides of the equation.

8x - 8 + 8 = 7x + 8 + 8

8x = 7x + 16

Subtract 7x from both sides of the equation.

8x - 7x = 7x - 7x + 16

x = 16

Answer: D) 16

Checking to see if our answer is right.

8x - 8 = 7x + 8

8(16) - 8 = 7(16) + 8

128 - 8 = 112 + 8

120 = 120

Large reusable bottles cost $4 more than small ones. 8 large bottles cost $24 less than 12 small ones. How much does one small bottles cost?

Answers

$24 + $4 = $28
8 + 12 = 20
28-20=8

One canned juice drink is 30 percent orange juice, another is 10 percent orange juice. how many liters of each should be mixed together in order to get 20l, that is 12 perfect orange juice

Answers

let there be x litters of 30 percent juice and (20-x) litters of 10 percent juice.

0.30x+0.10(20-x)=20*0.12
0.3x+2-0.1x=2.4
0.2x=0.4
x=2
20-x=20-2=18

mix 2 litters of 30 percent juice and 18 litters of 10 percent juice.

Why do elephants have pointy tails

Answers

i'm finding it hard to see how this is math... real smart, btw. Thanks for the free points!

Pointy tails help make elephants more streamlined and aerodynamic

HELP PLEASE APPRECIATED Margarita is driving at the speed of s-4/ s^2- 9s + 20 miles per hour.

The distance Margarita covers in s-5/4 hours is ___ miles.
Give the answer in simplest form.

Only correct answers and please show your work so I can refer to it on my other problems. thank you.

Answers

d = V • t ... displacement = velocity • time
d = [(s – 4) ⁄ (s² – 9s + 20)] • [(s – 5) ⁄ 4] ... rearrange terms
d = (s – 4) • (s – 5) ⁄ [4(s² – 9s + 20)] ... factor denominator
d = (s – 4) • (s – 5) ⁄ [4(s – 4) • (s – 5)]
d = ¼ mile

The distance Margarita covers in [tex]$ \frac{s-5}{4} $[/tex]hours is [tex]$ \frac{1}{4} $[/tex] miles.

Given that Margarita is driving at the speed of [tex]$ \frac{s-4}{s^2 - 9s + 20} $[/tex] miles per hour, we can express the distance function as:

[tex]\[ d(s) = \text{speed} \times \text{time} = \left( \frac{s-4}{s^2 - 9s + 20} \right) \times s \][/tex]

[tex]\[ d\left(\frac{s-5}{4}\right) = \left( \frac{s-4}{s^2 - 9s + 20} \right) \times \frac{s-5}{4} \][/tex]

Let's simplify this expression:

[tex]\[ d\left(\frac{s-5}{4}\right) = \frac{(s-4)(s-5)}{4(s^2 - 9s + 20)} \][/tex]

[tex]\[ d\left(\frac{s-5}{4}\right) = \frac{s^2 - 9s + 20}{4(s^2 - 9s + 20)} \][/tex]

[tex]\[ d\left(\frac{s-5}{4}\right) = \frac{1}{4} \][/tex]

Factor this expression completely.

mr + ns - nr - ms

Answers

Greetings!

[tex]mr+ns-nr-ms[/tex]
Rearrange.
[tex]mr-nr-ms+ns[/tex]
Factor by grouping.
[tex]r(m-n)+s(-m+n)[/tex]
Multiply the expression by -1.
[tex]r(m-n)-1(+s(-m+n))[/tex]
Simplify.
[tex]r(m-n)-s(m-n)[/tex]
Find the GCF.
[tex](m-n)(r-s)[/tex]

Hope this helps.
-Benjamin

The average mass of a kernel of popcorn is 0.125 g. if 1 pound = 16 ounces, and 1 ounce = 28.3 g, then how many kernels of popcorn are there in 0.500 pounds of popcorn?

Answers

Average mass of a kernel of popcorn = 0.125 g
1 pound = 16 ounces, and 1 ounce = 28.3 g
how many kernels of popcorn are there in 0.500 pounds of popcorn = ?
0.500 pound = 16 x 0.500 ounces = 8 ounces
8 ounces = 8 x 28.3g = 226.4 g
Now divide this quantity by average mass;
226.4 / 0.125
= 811.2 kernels of popcorn

Final answer:

To find the number of kernels of popcorn in 0.500 pounds, first convert the weight to grams and then divide by the average mass of a kernel. The calculation gives an approximate result of 1811 kernels.

Explanation:

To determine the number of kernels of popcorn in 0.500 pounds, we need to convert the weight from pounds to grams and then divide by the average mass of a kernel.

First, let's convert pounds to ounces. Since 1 pound is equal to 16 ounces, we have:

0.500 pounds = 0.500 x 16 = 8 ounces.

Next, let's convert ounces to grams. Since 1 ounce is equal to 28.3 grams, we have:

8 ounces = 8 x 28.3 = 226.4 grams.

Finally, divide the total grams by the average mass of a kernel:

226.4 grams / 0.125 grams = 1811.2 kernels.

Therefore, there are approximately 1811 kernels of popcorn in 0.500 pounds.

Consider the system of equations

{ -2x + 6y = -8
{ cx + 3y = -4

What value of c would produce a system that has an infinite number of solutions?
Justify your answer.

Explain why there is no value of c that would produce a system with no solution.

Enter your answer, justification, and explanation in the box provided.

Answers

Make the equation the same or a multiple of the other to have an infinite number of solutions. See how the -8/2= -4 and 6/2=3 ? then -2/2 = c
Make c = -1 and they are the same linear equation. (same slope, same intercepts, same line) and therefore have infinite solutions.

In order to have no solutions, the lines cannot cross at all and so they must be parallel but not the same line. Parallel lines have the same slope with different intercepts. if you rearrange both equations in slope intercept form:
y = x/3 - 4/3
y = - cx/3 - 4/3

no matter what you make c the lines will always cross at the y-intercept (0, -4/3). this is a solution and therefore there's no value of c that would produce a system with no solution.

Are the following equations parallel, perpendicular, the same line, or none of these -4x = -5y + 30
5y = -4x + 30

Answers

Answer:

parallel

Step-by-step explanation:

You are offered an item for $17.85. If the seller states he normally sells the same item for $19.95, what percentage discount is he offering you?

Answers

Take 19.95 and subtract 17.85 from it to get 2.10. Divide 2.10 by 19.95 to get 0.105. Multiply that by 100 and you get 10.52. So it's 10% or maybe 11% if you're supposed to round. Hope this helps

Answer:

Find out the what percentage discount is seller offering you .

To prove

Formula

[tex]Discouunt\ percentage = \frac{Discount\times 100}{Marked\ price}[/tex]

Discount = Marked price - Selling price

As given

You are offered an item for $17.85. If the seller states he normally sells the same item for $19.95 .

Here

Marked price = $19.95

Selling price = $17.85

Discount = 19.95 - 17.85

= $2.1

Put in the formula

[tex]Discouunt\ percentage = \frac{2.1\times 100}{19.95}[/tex]

[tex]Discouunt\ percentage = \frac{210}{19.95}[/tex]

Discount percentage = 10.5% (Approx)

Therefore the discount is seller offering you is 10.5 % .

4=3/4m-6

find the value of m

Answers

4 = 3/4m -6

add 6 to both sides

10 = 3/4m

divide both sides by 3/4

m = 10 / 3/4 = 10 *4 = 40 /3 = 13 1/3

Find the product of 20 x 9 x 5 tell which property you used

Answers

I will be using the associative property. (20 x 9) x 5 = 900
You first multiply 20 x 9, which equals 180, then you multiply 180 x 5, which equals 900.

I used associative property and the product of 20 x 9 x 5 is 900.

What is associative property?

"The associative property states that when an expression has three terms, they can be grouped in any way to solve that expression. The grouping of numbers will never change the result of their operation. The associative property is true for the cases of addition and multiplication. Neither the sum nor the product of the expression changes."

For the given product of 20 x 9 x 5

I am using the associative property.

(20 x 9) x 5 = 900

First multiply 20 x 9, which gives 180

(180) x 5 = 900

Next multiply 180 x 5, which gives 900.

Hence, I used associative property and the product of 20 x 9 x 5 is 900.

Learn more about associative property here

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Which of the following numbers is not part of the solution to x > 1?

1
1.2
4
8

Answers

The answer is 1. Because 1=1, 1 is not > 1

Answer:

the answer is 1

hpoe this helps

If an open box has a square base and a volume of 115 in.3 and is constructed from a tin sheet, find the dimensions of the box, assuming a minimum amount of material is used in its construction. (round your answers to two decimal places.)

Answers

Let h = height of the box,
x = side length of the base.

Volume of the box is [tex]V=x^{2} h = 115 [/tex].
So [tex]h = \frac{115}{ x^{2} } [/tex]

Surface area of a box is S = 2(Width • Length + Length • Height + Height • Width).
So surface area of the box is
[tex]S = 2( x^{2} + hx + hx) \\ = 2 x^{2} + 4hx \\ = 2 x^{2} + 4( \frac{115}{ x^{2} } )x[/tex]
[tex]= 2 x^{2} + \frac{460}{x} [/tex]
The surface are is supposed to be the minimum. So we'll need to find the first derivative of the surface area function and set it to zero.

[tex]S' = 4x- \frac{460}{ x^{2} } = 0[/tex]
[tex] 4x = \frac{460}{ x^{2} } \\ 4x^{3} = 460 \\ x^{3} = 115 \\ x = \sqrt[3]{115} = 4.86 [/tex]
Then [tex]h= \frac{115}{4.86^{2}} = 4.87 [/tex]
So the box is 4.86 in. wide and 4.87 in. high.

length = 6.13 Width = 6.13 Height = 3.06 Let's use the variable L to represent the length of a bottom edge of the box. With that, the height of the box will be 115 / w^2. Since the box is open, the box will have a bottom, and 4 sides. No top. So the expression for the surface area of the box will be w^2 + 4w(115/w^2) = w^2 + 460/w Since we're looking for a local minimum, that will be at a point where the first derivative of the function is 0. So the first derivative is: 2w - 460/w^2 = 2w^3/w^2 - 460/w^2 = (2w^3 - 460)/w^2 = 2(w^3 - 230)/w^2 The above derivative has a real zero at the cube root of 230 which is approximately 6.126926 So the length of the sides of the box are 6.13 inches and the height of the box is 115/(6.13^2) = 3.06 inches.

Find the value of X, can someone help me?

Answers

(3x -20) / 56 = 9/72
72(3x - 20) = 9 (56)
216x - 1440 = 504
216x = 1944
x = 9

Need help please
What is the result of dividing 2x^3−3x^2−17x+30 by x + 3?
2x^2+3x−8
2x^2−9x−44
2x^2+3x−26
2x^2−9x+10

What is the result of dividing x^3−7 by x + 2?
x^2−2x+4+15/x+2
x^2−2x+4+1/x+2
x^2−2x+4−1/x+2
x^2−2x+4−15/x+2

What is the remainder when the polynomial 6x^2+11x−3 is divided by 2x−1?

What is the remainder when the polynomial 5x^2+10x−15 is divided by x + 5?

Answers

Use synthetic division for these questions. I did all of them, but only showed my step by step work for one of them. If you have any questions about the other answers or are stuck please comment back on this answer with a question and I'd be happy to respond!

Answers:
1. 2x^2−9x+10
2. x^2−2x+4+15/x+2 (don't forget to put 0's in for the coefficients of [tex] x^{2} [/tex] as well as [tex]x[/tex])
3. The remainder is 4. (In the new equation this would be written as [tex] \frac{4}{2x-1} [/tex])
4.The remainder is 60.

I included my last page of work in case it helps, but it is not step-by-step so if you have questions, please ask!

Final answer:

The quotient and remainder for the provided polynomial divisions are as follows: 1) 2x^2−9x−44, 2) x^2−2x+4+1/x+2, 3) Remainder 1, 4) Remainder 0.

Explanation:

The process of dividing polynomials is similar to the long division method used in arithmetic. For your first question, the result of dividing 2x^3−3x^2−17x+30 by x + 3 comes out to be 2x^2−9x−44.

For the second question, when x^3−7 is divided by x + 2, the result is x^2−2x+4+1/x+2.

Coming to your third question, when the polynomial 6x^2+11x−3 is divided by 2x−1, the remainder is 1.

Lastly, when the polynomial 5x^2+10x−15 is divided by x + 5, the remainder is 0.

Learn more about Polynomial Division here:

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Fencing costs $10.15/ft. A customer purchases 8 3/8 ft of fencing for his yard. How much did the customer pay for the fencing? Round to the nearest cent.

Answers

The customer paid about $85.00 for 8 3/8 ft of fencing.

If you just take 10.15x8 3/8 it is $85.01 rounded to the nearest sent

Where is the x-intercept(s) in the graph of y = (x-1)(x+8)/(x+8)(x-6)?

Answers

[tex] \frac{(x-1)(x+8)}{(x-6)(x+8)} = \frac{(x-1)}{(x-6)} [/tex]

The x-intercepts are where the graph crosses the x-axis, in other words what x is when y = 0. This is only when the numerator is zero. After simplifying and factoring out the (x+8), y = 0 only when x = 1.

* When x = 6 the denominator is zero and the function is undefined. x = 6 would then be a vertical asymptote.

Answer:

B: 1

Step-by-step explanation:

Edge 2021

If be bisects abd find x and m angle abe

Answers

we need a picture of the graph

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