Answer:
y - 6 = 8(x + 4)
Step-by-step explanation:
The point-slope form is [tex]y-y_{1}=m(x-x_{1})[/tex], where y1 and x1 are any point on the line and m is the slope.
The formula for slope is [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
By plugging in the points we have, we get: [tex]\frac{22-6}{-2-(-4)}=8=m[/tex]
We can use any of the two pairs of points to represent y1 and x1 so if we choose (-4,6), we get:
[tex]y-6=8(x-(-4))\\y-6=8(x+4)[/tex]
If a1 = 3 and an = 5an-1 + 3 then find the value of a4.
Answer:
Step-by-step explanation:
4a
f(x) = -x² +9
Find f(-5)
Answer:
f(-5) = -16
Step-by-step explanation:
f(-5) = - [tex](-5)^{2}[/tex] + 9
-(25) + 9
-25+9
-16
The volume of a cylinder is 220 cm³ the radius of the cross section is 25cm Find the height of the cylinder.
Answer:
2.80112699842
Step-by-step explanation:
height = volume / (π × radius²)
220/25 pi
A triangle has two sides of length 18 and 13 What is the smallest possible whole-number length for the third side?
find the mean of 5, 25, 10, 15, 20
Answer:15
Step-by-step explanation:
The mean is the sum of all the numbers divided by the amount of numbers
Step 1: Add
5+25+10+15+20 = 75
Step 2: Divide
Since there are 5 numbers divide 75 by 5
75/5 = 15
The answer is 15
Answer: The mean is 15
Step-by-step explanation:
To find the mean, we add all the numbers together and divide by the number of numbers.
[tex]\displaystyle \frac{5+ 25+10+ 15+ 20}{5} = \frac{75}{5} = 15[/tex]
What is What is 2/5+(1/2)2
The 2 is an exponent
And the others are fractions
2/5+(1/2)
The value is 13/20
We do simplification here
2/5+1/4
=(8+5)/20
=13/20
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What is the percent of chloride ion in a sample if 2. 500 g of the sample produces 1. 750 g of agcl when treated with excess ag⁺? report your answer to two decimal places.
The percent of chloride ion in a sample if 2. 500 g of the sample produces 1. 750 g of AgCl when treated with excess ag⁺ is 17.2%
The percent of chloride can be calculate as follow:
Mass of AgCl precipitated = 1.750 g
Molar mass of AgCl = 143.32 g/mol
Molar mass of Chlorine atom = 35.45 g/mol
Asume, all the chlorine in the sample is precipitated to silver chloride. So, the mass of chlorine in silver chloride will be equal to the mass of chlorine present in the sample.
To calculate the mass of chlorine in given mass of AgCl, we apply unitary method:
In 143.32 g of silver chloride, mass of chlorine present is 35.45 g
So, in 1.3487 g of silver chloride, mass of chlorine present will be =
35.45g/143.32 g * 1.750 g = 0.43 g
To calculate the percentage composition of chlorine in pure chloride compound, as follows:
Mass of pure chloride compound = 2.500 g
Mass of chlorine = 0.43 g
% Chlorine = 0.43/2.5 *100
% Chlorine = 17.2 %
Therefore, the mass percentage of chloride in pure chloride compound is 17.2%
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1.109, 1.1, 1.19, 1.1091 order these numbers from least to greatest
The length of the bae of an iocele triangle i x. The length of a leg i 4x−3. The perimeter of the triangle i 66. Find x.
Answer:
x = 8
Step-by-step explanation:
since the triangle is isosceles then the 2 legs are congruent, that is both 4x - 3
the perimeter is the sum of the 3 sides , that is
x + 4x - 3 + 4x - 3 = 66
9x - 6 = 66 ( add 6 to both sides )
9x = 72 ( divide both sides by 9 )
x = 8
The price of a gallon of milk was $2. 65. The price rose y dollars after the last hurricane. Then the price dropped $0. 15 and later rose again by $0. 5. Which expression represents the current price of milk?.
The expression represents the current price of milk is 3 + y in dollars
The initial price of a gallon of milk = $2.65
The price rose y dollars after the last hurricane
Then the expression will be
2.65 + y
Then the price dropped $0. 15
2.65 + y - 0.15
Add the terms
2.65 + y - 0.15 = 2.5 - y
later rose again by $0. 5
2.5 + y + 0.5
Add the terms in the expression
2.5 + y + 0.5 = (2.5 + 0.5) + y
= 3 + y
Current price of milk = 3 + y in dollars
Hence, the expression represents the current price of milk is 3 + y in dollars
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Question content area top Part 1 The length of the base of an isosceles triangle is 2x-6. The length of a leg is x. The perimeter of the triangle is 43 . Find x.
The value of x in the isosceles triangle is 9.25.
What is the value of x?An isosceles triangle is a polygon that has three sides. The opposite length have the same length and equal angles. has two opposite sides. If the two angles are equal , it means the triangle is an isosceles.
Th perimeter of an isosceles triangle is the sum of the length of the three sides of the triangle.
Perimeter = (2 x length of leg) + base
43 = (2x x) + 2x - 6
43 = 2x + 2x - 6
43 = 4x - 6
43 - 6 = 4x
37 = 4x
x = 37 / 4
x = 9.25
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How many quart of pure antifreeze mut be added to 5 quart of a 10% antifreeze olution to obtain a 30% antifreeze olution?
The amount of pure antifreeze that needs to be added = 1.429 quarts
What is antifreeze ?
A colored liquid called antifreeze, often known as engine coolant, is combined with water to assist regulate your engine in extremely hot weather.
Let x be the amount of pure antifreeze that needs to be added
The amount of pure antifreeze added (x) plus the amount of pure antifreeze in the 5 quart of 10% antifreeze solution [ 0.1*5] should be equal to the amount of pure antifreeze in the final mixture [ 0.3*(5+x) ]
The equation obtained is:
x+[0.10*5]=0.30(5+x)
x+0.5=1.5+0.30x
x-0.30x =1.5-0.5 = 1
0.70x=1
divide each side by 0.70
x=1.429 quarts
So, the amount of pure antifreeze that needs to be added = 1.429 quarts
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23.89$+41.25$ plis help plis
Answer:
$65.14
Step-by-step explanation:
You will line up the numbers according to the decimal points.
You add as you normally would, ignoring the decimal point.
When you get your answer you will bring the decimal point down.
(How your problem should look:)
$41.25
+ $23.89
$65.14
Find the slope (m) and the y-intercept (b) of each line. Simplify your answers. Use the slope-intercept form of a linear equation: y = mx + b
y = -x
m =
/
b =
Answer:
slope = -1, y-intercept = is n/a. The line is vertical since the y intercept was not given.
Which of the following is equivalent to -4 + 5x ≤ 16 ?
Answer:
Step-by-step explanation:
m n
how many solutions does have 9x+3=6x-12=3x
Answer: only one solution
Step-by-step explanation:
9x + 2/3 = 3x + 3 is a linear equation.
Linear equations only have one solution as the lowest power in numbers is 1.
9x + 2/3 = 3x + 3
9x - 3x = 3 - 2/3
3x = 7/3
x = (7/3)/3
x = 7/9
………………………………………………..
Answer:
62, 78
Step-by-step explanation:
248:4
you want to know
x:1 (hour)
you can do that by dividing by 4 which gives
248/4 = 62
for 2 it's the same, divide by four
Answer:
1- 62 miles per our
2- 78 calories per serving
9. Emily measured the depth of water in a bathtub at two-minute intervals after the tap was turned off and the
stopper released. The table shows her data.
a) Make a scatter plot for the data.
b) Describe the correlation of the scatter plot.
c) What will the approximate depth be at 15 seconds?
Considering the data in the table, it is found that:
a) The scatter plot is given by the image at the end of the answer.
b) The correlation of the scatter plot is negative, as when the input increases the output decreases.
c) The estimate for the depth at 15 seconds is of 50.37 cm.
How to built the scatter plot?The scatter plot is built inserting all the points in the table, which are in the following format:
(Time, Depth).
Hence the points are given as follows:
(2, 47), (4, 41), (6, 38), (8, 37), (10, 32), (12, 24), (14, 20), (16, 19).
From both the table and the scatter plot given by the image at the end of the answer, as the input increases, the output decreases, hence the scatter plot has a negative correlation.
To make a prediction for a given input, the line of best fit has to be constructed using these points.
Inserting these points into a linear regression calculator, the line of best fit is:
y = -2.07x + 50.89.
At a time of 15 seconds = 0.25 minutes, the depth will be of:
y = -2.07 x 0.25 + 50.89 = 50.37 cm.
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What is the percent of increase from 5 to 8
Answer: 60%
Step-by-step explanation:
(5 × p) / 100 = 3
((5 × p) / 100) × 100 = 3 × 100
5p = 300
5p / 5 = 300 / 5
p = 60
Percent Increase = 60
Which is the order from least to greatest of the following: six fifths, eight ninths, 0.5, forty percent?
forty percent, 0.5, eight ninths, six fifths
six fifths, eight ninths, 0.5, forty percent
0.5, forty percent, six fifths, eight ninths
eight ninths, 0.5, six fifths, forty percent
The order from least to greatest is "forty percent, 0.5, eight-ninths, six-fifths".
What is a fraction?A fraction is a part of the whole represented by a/b, where a and b are any integers.
The given numbers are,
six fifths = 6/5 = 1.2
eight ninths = 8/9 = 0.9
0.5
40% = 0.4
Therefore, the order from least to greatest is "forty percent, 0.5, eight-ninths, six-fifths".
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i dont understand it
The given expression 7x - y = -9 in the slope intercept form can be represented as y = 7x + 9.
The expression given to us is -
7x - y = -9
We have to represent this in the slope intercept form.
The slope intercept form can be represented as -
y = mx + c
where, y = y coordinate of the line
m = slope of the line
x = x coordinate of the line
c = y intercept of the line
Thus, representing the given expression in the slope intercept form, we have
7x - y = -9
=> -y = -7x - 9
=> y = 7x + 9
Thus, the given expression in the slope intercept form can be represented as y = 7x + 9.
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To raise money for after-school programs at an elementary school, a group of parents is holding a weekend of games in a community center. They charge $8 per person for entry into the event. The group would like to earn at least $600, after paying for the cost of renting the space, which is $40 an hour.
The inequality represents the situation group of parents who would like to earn at least $600, after paying for the cost of renting the space $40 an hour, and charging $8 per person for entry into the event is 8x - 4y ≥ 600, and x > 0, Y > 0.
We are given the following;
They charge $8 per person for entry into the event.
The group would like to earn at least $600, after paying for the cost of renting the space, which is $40 an hour.
Let the number of people be x and the number of hours they are present in the space be y.
Per person entry cost is $8.
Donations by all the people entering the space are 8x.
The per hour cost of rent is $40.
The total cost of renting the space is 40y which will be subtracted from the total amount of donations.
They plan to earn a minimum of $600.
So, the inequality will be given by;
8x - 4y ≥ 600 and x > 0, Y > 0.
Thus, the inequality represents the situation group of parents who would like to earn at least $600, after paying for the cost of renting the space $40 an hour, and charging $8 per person for entry into the event is 8x - 4y ≥ 600, and x > 0, Y > 0.
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A store is offering a 25% discount on all electronics during a special weekend sale. Marcia wants to buy a television that regularly costs p dollars. She has written the expression 0. 75p to represent the sale price. Which is the best description for her expression?.
Marcia has written the expression 0. 75p to represent the sale price. The best description for her expression is she multiplied p by 0.25 then subtracted that from p.
How to express the sale price?
The sale price is the price after discount. Discount is the amount by which the origin price of an item is reduced. In this case, Marcia wants to buy a television with the origin prices is p dollars. The store is offering 25% discount.
p = the origin price
25% discount = 0.75p
The sale price = p - (0.25p)
So, the best description for Marcia's expression is multiplied p by 0.25 then subtracted that from p.
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Sheri's house is 0.05 miles from Abdul's house. The post office is 0.1 mile from Abdul’s house. The school is 38mile from the post office.
If Sheri stops at Abdul’s house and the post office on her way to school, how far will Sheri walk in all?
Answer:
233
Step-by-step explanation:
Write an equation of the line with the given slope and y-intercept
Slope: 4
y-intercept: -8
[tex]y = 4x -8\qquad \impliedby \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}[/tex]
vthe waitress at the restaurant provided really good service so you and your friends decided to add on an 20% tip to your $32 bill. how much money will be added onto the bill for the tip?
The answer of the given question is $6.4, this is the money that need to be added onto the bill for the tip.
How to calculate a 20% tip?
To calculate tip, we need to multiply the total bill by 1 plus the decimal percentage tip we'd like to leave. If we wanted to leave a 20% tip, we would add 1 to 0.20 to get 1.20. Then, multiply the bill by 1.20 to get the total amount we'd leave including tip.
In this case, we have a $32 bill and we would like to add on an 20% tip. So, it will be as follows:
20% = 0.20
1 + 0.20 = 1.20
Total bill will be 1.20 x $32 = $38.4
Hence, the tip amount is $38.4 - $32 = $6.4
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what is the rotational symmetry of this please somone tell me
The rotational symmetry of the above attached figure is 4 ...
What is the rotational symmetry ?
= Rotational symmetry is the number of times a shape can “fit into itself” , when it is rotated 360° about its centre....
Example: Rotational Symmetry of Equilateral Triangle..
Equal sides and angles define an equilateral triangle.
• How can u find rotational symmetry ?
= An object has rotational symmetry if that figure is itself after you rotate it less than 180 degrees. If it is itself after exactly 180 degrees no more no less then that figure has point symmetry.
The rotational symmetry of the above attached figure is 4 ...
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g if the standard deviation of the lifetimes of television tubes is estimated to be 100 h, how large a sample must we take in order to be (a) 95%, (b) 99%, and (c) 99.73% confident that the error in the estimated mean lifetime will not exceed 20 h?.
Ken reads 1 1/2 pages in a book in 3/4 minute. How many minutes does it take him to read one page
1/3(12 - 9w) Use the distributive property to remove the parentheses.
Simplify your answer as much as possible.
Answer:
Step-by-step explanation:
1/3(12) - 1/3(9w)
4 - 3w