Mathematics High School

Please help !! I fan and medal!!

1.)rewrite the following expression using the distributive property.
5(2x-8)
A.)-30x
B.)10x-40
C.)10x+40
D.)10x-8

2.)simplify the following expression:
-16-18/2+25/5+1. ( the -16 and -18 are both on top of the 2 it's a fraction)
A.)-18
B.)6
C.)10
D.)-6

Answers

Answer 1
1. B. 10x-40
2 i think you wrote it wrong but I'm going to guess to the best of my abilities
D. -6

Related Questions

PLEASE HELP ASSSAAAAPPPP

Answers

All you need to do is plug 2 in for x
[tex]f(x) = 5^x \\ f(2) = 5^2 = 25[/tex]
The answer is 25 dsfsdffasfa

You are finding the product of two square roots. Each radicand is the same variable raised to an odd power. Explain why you would want to multiply the radicands together first and then simplify the product.

Answers

Multiplying the two same variables will combine them into one variable of an even power. (odd number + odd number = even number)
Then the square root (even root/radicand) can be taken eliminating the radicand.

Here's an example to show you what I mean, so you can put it in your own words if you want.

[tex] \sqrt{ x^{3} } * \sqrt{ x^{7} } = \sqrt{ x^{10} } = x^{5} [/tex]

Divide by splitting up the numerator. 21x^3y^4-7x^2y^3+14x^2y^2-xy over 7x^2y^2

Answers

[tex](21x^3y^4-7x^2y^3+14x^2y^2-xy) \div (7x^2y^2)[/tex]

[tex]\dfrac{21x^3y^4}{7x^2y^2} - \dfrac{7x^2y^3}{7x^2y^2} - \dfrac{14x^2y^2}{7x^2y^2} - \dfrac{xy}{7x^2y^2}[/tex]

[tex]3xy^2 - y - 2 - \dfrac{1}{7xy} [/tex]

When constructing a regular hexagon inscribed in a circle, what is the measure of an angle formed by any two adjacent vertices of the hexagon and the center of the circle?

Answers

the answer would be 60°

Answer:

Measure of angle is 60°     

Step-by-step explanation:

Given when constructing a regular hexagon inscribed in a circle, we have to measure an angle formed by any two adjacent vertices of the hexagon and the center of the circle.

we have to find the measure of central angle of hexagon

Total measure of angle at centre is 360°

As polygon is given regular hexagon therefore central angle divides into six equal angles.

Hence, measure of an angle formed by any two adjacent vertices of the hexagon and the center of the circle is

[tex]\frac{\text{Total angle at centre}}{\text{number of sides}}=\frac{360}{6}=60^{\circ}[/tex]

Use the quadratic formula to solve x^2+8x+9=0

What are the solutions to the equation?

Round irrational solutions to the nearest tenth.

x=−1 and x=−8

x = 1 and x=−9

x=−6.6 and x=−1.4

x=−1.2 and x=−6.8


Please explain the answer!

Answers

none of your options, not via complete the square nor quadratic the formula.

Solve for x over the real numbers:
x^2 + 8 x + 9 = 0

x = (-8 ± sqrt(8^2 - 4×9))/2 = (-8 ± sqrt(64 - 36))/2 = (-8 ± sqrt(28))/2:
x = (-8 + sqrt(28))/2 or x = (-8 - sqrt(28))/2

sqrt(28) = sqrt(4×7) = sqrt(2^2×7) = 2sqrt(7):
x = (2 sqrt(7) - 8)/2 or x = (-2 sqrt(7) - 8)/2

Factor 2 from -8 + 2 sqrt(7) giving 2 (sqrt(7) - 4):
x = 1/22 (sqrt(7) - 4) or x = (-2 sqrt(7) - 8)/2

(2 (sqrt(7) - 4))/2 = sqrt(7) - 4:
x = sqrt(7) - 4 or x = (-2 sqrt(7) - 8)/2

Factor 2 from -8 - 2 sqrt(7) giving 2 (-sqrt(7) - 4):
x = sqrt(7) - 4 or x = 1/22 (-sqrt(7) - 4)

(2 (-sqrt(7) - 4))/2 = -sqrt(7) - 4:

Answer: x = sqrt(7) - 4 or x = -sqrt(7) - 4_____________________________________________________

Solve for x:
x^2 + 8 x + 9 = 0

Subtract 9 from both sides:
x^2 + 8 x = -9

Add 16 to both sides:
x^2 + 8 x + 16 = 7

Write the left hand side as a square:
(x + 4)^2 = 7

Take the square root of both sides:
x + 4 = sqrt(7) or x + 4 = -sqrt(7)

Subtract 4 from both sides:
x = sqrt(7) - 4 or x + 4 = -sqrt(7)

Subtract 4 from both sides:
Answer:  x = sqrt(7) - 4 or x = -4 - sqrt(7)

Kite ABCD has a longer diagonal AC with a length of 14 in. and a shorter diagonal BD with a length of 8 in. The diagonals intersect at point E. What is the length of BE?
4 in
7 in
8 in
14 in

Answers

Hello,
The longer diagonal is an axis of symmetry of the  Kite.
So E is the middle of BD and BE=8/2=4

Answer A: 4in.

The equation x2+y2−4x+2y=b describes a circle. Complete the square to find the center of the circle. The center of the circle is ( , ) The radius of the circle is 7 units. What is the value of b in the equation? b=

Answers

look to the coefficients on the middle terms (-4x and 2y)

divide each coefficient by 2 and square to determine what to add.

(-4/2)^2 = 4 needs to be added to complete the square for x.

(2/2)^2 = 1 needs to be added to complete the square for y.

add to both sides of the equal sign to keep the equation balanced.

x^2 - 4x + 4 + y^2 + 2y + 1 = b + 4 + 1
factor
(x - 2)^2 + (y + 1)^2 = b + 5

The general equation for a circle is:
(x - h)^2 + (y - k)^2 = r^2
with center (h,k) and radius r

compare this to the equation. you see that the center is: (2, -1)

we can write
r^2 = b + 5
given that r = 7
49 = b + 5
49 - 5 = b
44 = b

A store carries two different sizes of a certain brand of potato chips. bag 1 contains 8 ounces and costs $3.49. bag 2 contains 12 ounces, and costs $4.59. which bag has the lowest price per volume

Answers

The price per volume will be given by the following equation:
 P = (cost) / (volume of the bag)
 For bag 1: 
 P1 = (cost) / (volume of the bag)
 P1 = (3.49) / (8) = 0.43625 $
 For bag 2: 
 P2 = (4.59) / (12) = 0.3825 $
 We know that
 P1> P2
 Answer:
 bag 2 has the lowest price per volume 0.3825 $

Bag 2, with a price of $0.3825 per ounce, has a lower price per volume compared to Bag 1, which has a price of $0.43625 per ounce.

To determine which bag of potato chips has the lowest price per volume, we need to calculate the price per ounce for each bag.

For Bag 1, it contains 8 ounces and costs $3.49, so the price per ounce is $3.49 / 8 ounces = $0.43625 per ounce.For Bag 2, it contains 12 ounces and costs $4.59, so the price per ounce is $4.59 / 12 ounces = $0.3825 per ounce.

Comparing these values, we see that Bag 2 has the lower price per ounce at $0.3825 per ounce, making it the more economical choice per unit of volume.

A railroad crew can lay 7 miles of track each day. they need to lay 189 miles of track. 17 day how many miles. How many day to lay all the track

Answers

27 days because if they need 189 miles and do 7 miles a day you just divide 189 and 7 so the answer is 27 days.
Final answer:

Given that a crew can lay 7 miles of railroad track a day, it would take them a total of 27 days to lay 189 miles of railroad track.

Explanation:

The subject of this question is the calculation of the number of days it would take for a railroad crew to lay a specified number of miles of track. Given that the crew can lay 7 miles of track each day, and they need to lay a total of 189 miles of track.

To determine the total number of days required, we would divide the total miles by the miles the crew can lay each day.

So, 189 miles ÷ 7 miles/day = 27 days. Therefore, it would take the railroad crew a total of 27 days to lay all the track.

Learn more about Calculating Time here:

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Simplify -|-5 + 2|.

I'm not good with Math, can someone please help me how to Simplify, I have no clue to solving these questions that ask me to simplify, On my Online Schooling I wish to get better. Thanks for the time :)

Answers

Hello,

The answer will be "-5+2".

Reason:

I These lines turn negative numbers into positive:

Therefore the answer will be -5+2 (since how the first - sign was outside of the I).

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit

can someone help me? im not sure if my answers are right

Answers

Your answers are both correct

A restaurant offers three vegetable side dishes, two fruit side dishes, and five grain-based side dishes. Each entree comes with two side dishes.

What is the approximate probability of randomly choosing one vegetable and one grain-based side dish?
a.0.08889
b.0.17778
c.0.16667
d.0.33333

Answers

The approximate probability of randomly choosing one vegetable and one grain-based side dish is:   d.  0.33333

Explanation

Vegetable side dishes = 3,  Fruit side dishes = 2 and Grain-based side dishes = 5

So, total number of side dishes [tex]= 3+2+5= 10[/tex]

Number of ways for choosing two side dishes from total 10 dishes will be : [tex]^1^0C_{2}[/tex]

We need to randomly choose one vegetable and one grain-based side dish, so the number of ways [tex]= ^3C_{1} * ^5C_{1}[/tex]

Thus, the probability [tex]= \frac{^3C_{1} * ^5C_{1}}{^1^0C_{2}} = \frac{3*5}{45}= \frac{15}{45}= \frac{1}{3}= 0.3333...[/tex]

Answer:

D. 0.33333

Step-by-step explanation:

Can someone help me with this word problem?

Answers

So for question 7 part A the picture will be a triangle similar to the the one that shows the umbrella's height. But the base will be 40 and the height will be 130.

for part B the angle of depression can be found using the trigonometric function of tangent.

tan x = 40/130
tan^-1 (tan x) = tan^-1 (40/30)
x = 17 degrees

I hope i am right

what is the scale factor of ABC to UVW

Answers

One of the easiest question I've seen.
It's a scale factor of 5 because, 
5*5=25
5*3=15
5*4=20 
Hope this helps!

Answer:

C. 5

Step-by-step explanation:

We have been given an image of two triangles. We are asked to find the scale factor of ABC to UVW.

To find the scale factor of our given triangles, we will divide one side of triangle UVW by its corresponding side of triangle ABC.

[tex]\text{Original side}\times\text{Scale factor}=\text{New side}[/tex]

[tex]5\times\text{Scale factor}=25[/tex]

Upon dividing both sides of equation by 5, we will get:

[tex]\frac{5\times\text{Scale factor}}{5}=\frac{25}{5}[/tex]

[tex]\text{Scale factor}=5[/tex]

Therefore, the scale factor of triangle ABC to triangle UVW is 5 and option C is the correct choice.

Find the perimeter of the figure. Round your answer to the nearest tenth.
a) 41 Units b) 34.2 Units c) 23 Units d) 11.2 Units

Answers

counting the straight sides gives you 23 units and using the distance formula on the bottom side gives you about 11.18 units. 23+11.18=34.18 and round that to the nearest tenth to get the answer of 34.2 units.

describe the graph of y={1/(2x-10)}-3 compared to the graph of y=1/x

Answers

[tex]\bf ~~~~~~~~~~~~\textit{function transformations} \\\\\\ % templates f(x)= A( Bx+ C)+ D \\\\ ~~~~y= A( Bx+ C)+ D \\\\ f(x)= A\sqrt{ Bx+ C}+ D \\\\ f(x)= A(\mathbb{R})^{ Bx+ C}+ D \\\\ f(x)= A sin\left( B x+ C \right)+ D \\\\ --------------------[/tex]

[tex]\bf \bullet \textit{ stretches or shrinks horizontally by } A\cdot B\\\\ \bullet \textit{ flips it upside-down if } A\textit{ is negative}\\ ~~~~~~\textit{reflection over the x-axis} \\\\ \bullet \textit{ flips it sideways if } B\textit{ is negative}[/tex]

[tex]\bf ~~~~~~\textit{reflection over the y-axis} \\\\ \bullet \textit{ horizontal shift by }\frac{ C}{ B}\\ ~~~~~~if\ \frac{ C}{ B}\textit{ is negative, to the right}\\\\ ~~~~~~if\ \frac{ C}{ B}\textit{ is positive, to the left}\\\\ \bullet \textit{ vertical shift by } D\\ ~~~~~~if\ D\textit{ is negative, downwards}\\\\ ~~~~~~if\ D\textit{ is positive, upwards}\\\\ \bullet \textit{ period of }\frac{2\pi }{ B}[/tex]

with that template in mind, let's check these two

[tex]\bf \stackrel{parent}{y=\cfrac{1}{x}}\qquad \qquad\qquad \qquad \stackrel{transformed}{y=\cfrac{1}{\stackrel{B}{2}x\stackrel{C}{-10}}\stackrel{D}{-3}}\\\\ -------------------------------\\\\ B=2\qquad \textit{shrinks horizontally by }\frac{1}{2} \\\\\\ C=-10\qquad \cfrac{C}{B}=\cfrac{-10}{2}\implies -5\qquad \textit{horizontally right-shifted by }5 \\\\\\ D=-3\qquad \textit{vertically down-shifted by }3[/tex]

(12 + 5) + 32 × (10 − 5) =

Answers

Answer:

177 hope this helps 
[tex](12 + 5) + 32 \times (10 - 5) = [/tex]
[tex]17 + 32 \times 5 = [/tex]
[tex]17 + 160 = [/tex]
[tex]177[/tex]
So the answer is 177.

The distance between city A and city B is 22 miles. The distance between city B and city C is 54 miles. The distance betweeb city A and city C is 51 miles.

What type of trianglr is created by the three cities?

A. An acute triangle, beacuse 22^2+54^2>51^2
B. An acute triangle, beacuse 22^2+51^2>54^2
C. An obtuse triangle, beacuse 22^2+54^2>51^2
D. An obtuse triangle, beacuse 22^2+51^2>54^2,

Answers

The answer is B. It is an acute triangle because of 22^2 + 51^2 > 54^2. To identify the type of triangle referred to the problem, we use the Pythagorean Theorem which involves squaring the lengths of all sides of the triangle. If the hypotenuse’s square is less than the two smallest sides' squares added together, than it is an acute triangle. However, if the hypotenuse’s square is larger, then it is an obtuse triangle.

54 is the hypotenuse since it is the longest side.

Following the Pythagorean Theorem, a^2 + b^2 = c^2:

54^2=2916

51^2=2601

22^2=484

It becomes 2601+484 = 2916.

When the two shorter sides are added, the sum is greater than the square of the hypotenuse which is 2916. Thus, the formed triangle is acute. 

Answer:

B

Step-by-step explanation:

In a pond, lotus flower multiply its self after every 4 days. One lotus multiplies into two after four days, into 4 after 8 days, into 8 after 16 days and so on. If you see one lotus flower in a pond today, how many flowers will be there in the pond after 32 days.

Answers

The answer is 32 flowers. You can create the following table to see the pattern more clearly:

# of flower: 1, 2, 4, 8, 16
# of days: 4, 8, 16, 32

You are doubling the number of flowers to find the number of days. Or half the number of days is the number of flowers. So, in 32 days there are 16 flowers.

The mass of Venus is
4.87 x 10^24 kilograms, and the mass of Jupiter is
1,898 x 10^24 kilograms.

The mass of Jupiter is about _____ times the mass of Venus.

Answers

Mass Jupiter / mass of venus = 1898 * 10^24 / 4.87 * 10^24 = 1898 / 4.87 = 390 times heavier. I hope that comma is correct.

Answer:

The mass of Jupiter is about 389.7331 times the mass of Venus.

Step-by-step explanation:

The question is asking for how much the two masses vary from one another. Since the mass of Jupiter is greater than that of Venus, what value is to be multiplied by the mass of Venus that would give the mass of Jupiter?

Thus, to determine this, we divide the mass of Jupiter by the mass of Venus;

     = [tex]\frac{1898*10^{24} }{4.87*10^{24} }[/tex]

    =  [tex]\frac{1898}{4.87}[/tex]

    = 389.7331

 Therefore, the mass of Jupiter is about 389.7331 times the mass of Venus.

What’s the correct answer

Answers

140 because each week it goes up by 14 so 14 times 10 weeks is 140
Equation:
[tex]total = 11 + 3x[/tex]
For 10 weeks:
[tex]14 + 17 + 20 + 23 + 26 + 29 + 32 + 35 + 38 + 41 = 275[/tex]
Total:
Andrew will have earned $275 after 10 weeks

helpppppppppppppppppppppppppppppppppppppppppppp

Answers

x ≥ -32

they want 20 characters n stuff but if you want me to show work or whatever i can
x/4 ≥ -8
----------------
Multiply each side by 4
4 * x/4 ≥ -8 * 4
x ≥ -32

When the sum of 7 and three times a positive number is subtracted from the square of the​ number, 0 results. find the number?

Answers

The answer is...
x^2 - (7 + 2x) = 0
x^2 - 2x - 7 = 0

The required number is 10.

Given that,
When the sum of 7 and three times a positive number is subtracted from the square of the​ number, 0 results. That number is to be determined.

What is arithmetic?

In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication, and division,

Let the number be x,
The sum of 7 and three times a positive number is subtracted from the square of the​ number 0.
x²-x(3 + 7) = 0
x² = x(10)
x = 10

Thus, the required number is 10.

Learn more about arithmetic here:

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At the snack bar, a hot dog costs $1.50 and a slice of pizza costs $2. What percent of the cost of a slice of pizza is a cost of a hot dog? Which equation can be written to represent this scenario?

A. 1.5p=2
B. 1.5=2p
C. 2(1.5)=p
D. 2/1.5=p

How would you determine this answer?

Answers

That percent is 133
There are several answers for this
A and D
its 2/1.5=p because u would need to know how much more the pizza is than the hot dog and that answer would be .50 

HELP please :)

A patient requires an IV of 0.9% saline solution, also known as normal saline solution. How much distilled water, to the nearest milliliter, must be added to 100 milliliters of a 6 % saline solution to produce normal saline?,

Answers

x is the amount of distilled water that must be added (in milliliters)
2/(100+x)=9/(1000)
2000=900+9x
1100=9x
122.22=x
x= 122
The answer is 122 milliliters of distilled water must be added

What is the solution to the equation 5x = 40?

7
8
45
200

Answers

The answer to that is: X = 8.

40 divided by 5 = 8.

To check we can do 5 x 8 = 40.

X = 8
Well you want to isolate x so in order to undo multiplication, you divide the 5 on both side that way it cancels on the side with the x. 
                                                    
                                                   5x/5=40/5
 
next, simply dived 40 by 5 which is 8, x=8

A coach bought some shirts and 5 pairs of shorts. each shirt cost $12 and each pair of shorts cost $10. let t represent the number of shirts. write an expression that can be used to find the total cost of the shirts and shorts. answer

Answers

t=number of shirts
T=total cost (shirts + shorts)

12t+5(10)=T
12t+50=T

Answer: 12t  + 50=T
t=number of shirts
T=total cost. 

Please help does anyone know the answer Giving 20pts I need ASAP

Answers

The answer is x = 180 - (67 + 52).

That is because x, 67, and 52 make a straight line, hence, they will equal to 180.

So if you subtract the sum of 67 and 52 from 180 you'll get the value of x.

What is the measure of angle 1?

Answers

The sum of the two remote angles = the non connecting exterior angle. In plain simple English it means that
80o + 60o = <1
140 = <1 <<<<<<< ==== answer.

Carlos ran 3/8 of the race course. Lori ran 3/6 of the same race. Who ran further? Explain.

Answers

since it has a smaller denominator, the numerators have the same look as the smaller numerator 
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