Answer:
y = - 9x + 14
Step-by-step explanation:
the equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
calculate m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (- 4, 50 ) and (x₂, y₂ ) = (5, - 31 )
m = [tex]\frac{-31-50}{5-(-4)}[/tex] = [tex]\frac{-81}{5+4}[/tex] = [tex]\frac{-81}{9}[/tex] = - 9 , then
y = - 9x + c ← is the partial equation
to find c substitute either of the 2 points into the partial equation
using (5, - 31 )
- 31 = - 9(5) + c = - 45 + c ( add 45 to both sides )
14 = c
y = - 9x + 14 ← equation of line
every student who particpated in field day actives received a water bottle. the water bottle. the water bottle cam in 2 different colors. Based on your simulation how many students had to receive a water bottle in order to distribute water bottles in both colors?
The angles of a triangle are in the ratio 2 : 3 : 4. The largest angle in the triangle is:
Find the supplementary angle (or supplement) to a 55º angle
30 PTSSSSSS IF YOU HELP ME GOOD, I WILL GIVE YOU BRAINLYEST BUT ANY FOOL ANSWERS WILL BE REPORTED
The supplementary angle means the sum of angles will be 180°. Hence the supplementary angle (or supplement) to a 55º angle is 125°.
What is a linear pair?When adding two or more angles, the result is 180°, and such pairs of angles are called linear pairs. The word 'linear' means 'straight', and 180° is also referred to as a straight angle. That is why a linear pair is always 180°.
Given angle is 55°.
To find the supplementary angle or supplement of 55º we must subtract 55º from 180°.
That is Supplement = 180 - 55 = 125°.
This is because supplementary angle means sum of two angles results in 180°.
To know more about linear pair visit:
brainly.com/question/17525542
#SPJ1
PLS HELP I WILL GIVE 100 PTSSSSSSSSSSSSSSSSSSSS fool answers get reported good answers get brainiest
C) 36 yards 18*6=108
108ft to yards is 36
Answer:C
Step-by-step explanation:
Each jump rope is 6 feet long, so 18 jump ropes would require a total of:
18 x 6 = 108 feet of rope
Since there are 3 feet in a yard, we can convert 108 feet to yards by dividing by 3:
108 ÷ 3 = 36 yards
Therefore, the football coach should buy 36 yards of rope. The answer is (C).
Using the following formula (rate/12)
principal x ----------------- = monthly payment
(1-(1+rate/12)-60
What is the monthly payment on a 24000 loan at 6% for 60 months?
For a loan of $24,000 at 6% interest over 60 months, the monthly payment is $466.47.
What is Monthly Payment?A monthly payment is the sum of money that is made towards a debt or loan on a regular basis; it normally consists of both the main and interest. It is a set sum that the borrower must consistently pay until the debt is repaid in full. Mortgages, auto loans, student loans, and personal loans all frequently include monthly installments. The loan amount, the interest rate, and the term of the loan all affect how much will be paid each month.
We can use the following calculation to determine a loan's monthly payment:
M = P * (r * (1 + r)ⁿ) / ((1 + r)ⁿ⁻¹)
where:
M = payment each month
P = Principal (the loaned amount)
r = (Divide the annual interest rate by 12 to get the monthly interest rate)
n = total payments (12 divided by the number of years)
By entering the specified values, we obtain:
P = 24000
r = 6% / 12 = 0.005
n = 60
M = 24000 * (0.005 * (1 + 0.005)⁶⁰) / ((1 + 0.005)^60 - 1)
M = $466.47 (rounded to the nearest cent)
So, $466.47 is the monthly payment for a $24,000 loan with a 6% interest rate over 60 months.
To know more about loan visit:
brainly.com/question/30865675
#SPJ1
There are 240 politicians at a meeting.
They each shake hands with everyone
else. How many handshakes were there?
there were 28,800 handshakes that occurred at the meeting.
How to solve the question?
In order to calculate the number of handshakes that occurred, we can use the formula for the sum of the first n-1 positive integers. The reason we use n-1 is because each person shakes hands with n-1 other people (themselves excluded).
The formula is:
(n-1) + (n-2) + (n-3) + ... + 1
where n is the number of people in the group.
In this case, n = 240, so we plug in:
(240-1) + (240-2) + (240-3) + ... + 1
Simplifying:
239 + 238 + 237 + ... + 1
We can see that this is an arithmetic series with a common difference of -1 and a first term of 239. Using the formula for the sum of an arithmetic series, we get:
S = n/2 * (first term + last term)
S = 240/2 * (239 + 1)
S = 240/2 * 240
S = 28,800
Therefore, there were 28,800 handshakes that occurred at the meeting.
It's worth noting that this calculation assumes that each handshake is counted twice (once for each person involved). If we only counted each handshake once, then we would need to divide our final answer by 2, giving us 14,400 handshakes.
To know more about permutation visit :-
https://brainly.com/question/1216161
#SPJ1
simply the following expression below.
(x^2 -3x+7)
The expression (x^2 -3x+7) cannot be simplified further because there are no like terms to combine or any other operations to perform. It is already in its simplest form.
Simplifying the given expression.The expression (x^2 -3x+7) is a quadratic expression, meaning it has a degree of 2. It cannot be simplified further because there are no like terms to combine, which is the only operation that can be performed to simplify polynomials.
To understand this, let's look at the individual terms of the expression. The term x^2 is the highest degree term, which means it has the greatest power of x.
The term -3x is the linear term, which means it has a degree of 1. And the constant term is 7, which means it has a degree of 0.
Since the terms have different degrees and there are no like terms, there is no way to simplify the expression any further.
Therefore, (x^2 -3x+7) is already in its simplest form.
Read more about expression at
https://brainly.com/question/15775046
#SPJ1
G(Q) = 5 + 3Q + 202 - Q2 C2(Q) = 3 + 4Q + 2 1. Find the MC function for both C1(Q) AND C2(Q). 2. Find AVC function for both Ci(Q) AND C2(Q). 3. Find AFC function for both C1(Q) AND C2(Q). 4. Find AC function for both Ci(Q) AND C2(Q). 5. Find ATC function for both Ci(Q) AND C2(Q).
For C1(Q) = 3 - 2Q.
For C2(Q) = 4.
2. The AVC function
For C1(Q) = 5/Q + 3 + 20/Q - Q.
For C2(Q) = 3/Q + 4 + 2/Q.
3. The AFC function
For C1(Q)= 5/Q - 20/(5 + 3Q + 20/Q - Q)
For C2(Q) = 0.
4. To find the AC function
For C1(Q) = (5 + 3Q + 202 - Q^2)/Q + 5/Q - 20/(5 + 3Q + 20/Q - Q).
For C2(Q) = (3 + 4Q + 2)/Q + 3/Q + 4 + 2/Q.
5.To find the ATC function
For C1(Q)= 5/Q² + 3/Q + 20/Q² - Q/Q + 5/Q - 20/(5Q + 3Q² + 20 - Q²)
For C2(Q)= 3/Q² + 4/Q + 2/Q² + 3/Q + 4/Q + 2/Q.
Find the ATC functions for C1(Q) and C2(Q) given the provided cost functions?
1. To find the MC function, we take the derivative of the cost functions with respect to Q.
For C1(Q) = 5 + 3Q + 202 - Q^2, MC1(Q) = 3 - 2Q.
For C2(Q) = 3 + 4Q + 2, MC2(Q) = 4.
2. To find the AVC function, we divide the cost functions by Q.
For C1(Q), AVC1(Q) = (5 + 3Q + 202 - Q^2)/Q = 5/Q + 3 + 20/Q - Q.
For C2(Q), AVC2(Q) = (3 + 4Q + 2)/Q = 3/Q + 4 + 2/Q.
3. To find the AFC function, we subtract the AVC function from the ATC function.
For C1(Q), AFC1(Q) = (5 + 3Q + 202 - Q^2)/Q - (5 + 3Q + 202 - Q^2)/(5 + 3Q + 20/Q - Q)
= 5/Q - 20/(5 + 3Q + 20/Q - Q).
For
C2(Q), AFC2(Q) = (3 + 4Q + 2)/Q - (3 + 4Q + 2)/(3/Q + 4 + 2/Q) = 0.
4. To find the AC function, we add the AVC function to the AFC function.
For
C1(Q), AC1(Q) = (5 + 3Q + 202 - Q^2)/Q + 5/Q - 20/(5 + 3Q + 20/Q - Q).
For
C2(Q), AC2(Q) = (3 + 4Q + 2)/Q + 3/Q + 4 + 2/Q.
5. To find the ATC function, we divide the AC function by Q.
For
C1(Q), ATC1(Q) = [(5 + 3Q + 202 - Q²)/Q + 5/Q - 20/(5 + 3Q + 20/Q - Q)]/Q
= 5/Q² + 3/Q + 20/Q² - Q/Q + 5/Q - 20/(5Q + 3Q² + 20 - Q²).
For
C2(Q), ATC2(Q) = [(3 + 4Q + 2)/Q + 3/Q + 4 + 2/Q]/Q
= 3/Q² + 4/Q + 2/Q² + 3/Q + 4/Q + 2/Q.
Learn more about Average Total Cost
brainly.com/question/29306232
#SPJ11
[amc10b.2020.14] as shown in the figure below, six semicircles lie in the interior of a regular hexagon with side length 2 so that the diameters of the semicircles coincide with the sides of the hexagon. what is the area of the shaded region ---- inside the hexagon but outside all of the semicircles?
Six semicircles lie in the interior of a regular hexagon with a side length of 2 so that the diameters of the semicircles coincide with the sides of the hexagon. The zone of the shaded locale is around 10.3923 square units.
We will approach this problem by first finding the region of the hexagon and after that subtracting the zones of the six semicircles from it. The zone of a customary hexagon with side length 2 can be found utilizing the equation:
Region of hexagon = (3√3/2) x side[tex]^{2}[/tex]
Substituting the given esteem of side length, we get:
Area of hexagon = (3√3/2) x 2[tex]^{2}[/tex] = 6√3
The range of a crescent is half the region of the comparing circle. So, the zone of each crescent is:
Range of semicircle = 1/2 x π x radius[tex]^{2}[/tex] = 1/2 x π x 1^[tex]^{2}[/tex]= π/2
There are six semicircles, so the whole range of the semicircles is:
Add up to the zone of semicircles = 6 x π/2 = 3π At long last, able to find the zone of the shaded locale by subtracting the region of the semicircles from the range of the hexagon:
Zone of shaded locale = Range of hexagon - Add up to a range of semicircles
= 6√3 - 3π
≈ 10.3923 thus, the zone of the shaded locale is around 10.3923 square units.
To learn about hexagons visit:
https://brainly.com/question/3295271
#SPJ4
The advantage of making a stem-and-leaf display instead of a dotplot is that a stem-and-leaf display
A. is for quantitative data, while a dotplot shows categorical data.
B. none of these
C. satisfies the area principle.
D. preserves the individual data values.
E. shows the shape of the distribution better than a dotplot.
Given AABC, what is the value of x? Write the answer as a decimal number.
A
7
X
B
2
D
3.5
C
The value of x is given as follows:
x = 12.25
What are similar triangles?Similar triangles are triangles that share these two features listed as follows:
Congruent angle measures, as both triangles have the same angle measures.Proportional side lengths, which helps us find the missing side lengths.The proportional relationship for the side lengths in this problem is given as follows:
x/7 = 3.5/2
Applying cross multiplication, the value of x is obtained as follows:
2x = 7 x 3.5
x = 7 x 3.5/2
x = 12.25.
Missing InformationThe triangle is given by the image presented at the end of the answer.
More can be learned about similar triangles at brainly.com/question/14285697
#SPJ1
How would I solve 3 to the power of 2 times 9 to the power of 2
Answer: 729
Step-by-step explanation:
3^2 is the same has 3 to the power of 2
9^2 is the same as 9 to the power of 2
When you see an expression like 3^2 x 9^2, it means you must raise 3 and 9 to the power of 2, multiply those numbers, and then do it again.
3 raised to the power of 2, often known as 3 times itself or 3 x 3, equals 9.
9 raised to the power of 2, often known as 9 times itself (9 x 9), equals 81.
As a result, when we change these values in the original expression, we obtain:
3^2 x 9^2 = 9 x 81
Now that we have these two integers, we can easily multiply them to obtain the result:
9 x 81 = 729
Therefore, 729 is the answer to the equation 3^2 x 9^2.
Hope that was helpful.Find the area of the shape
The area of the composite shape are
1. Orange
2. Light blue
3. Purple
4. Green
5. Red
6. Yellow
7. Light green
8. Yellow
9. Dark blue
10. Pink
How to find the area of the composite shapesThe area of the composite shapes are solved as follows
1. rectangles
= 7 * 3 + (15 - 7) * 1.5
= 21 + 12
= 33 square cm
2.
= 39 x 4 + 0.5(39 + 26) x (18 - 4)
= 156 + 455
= 611 square m
3.
= 12 * 15 + 0.5 x 15 x 10
= 180 + 75
= 255 square ft
4.
= 15 x 7 + 0.5 x π x 3.5 x 3.5
= 105 + 19.24
= 124.2 square cm
5.
= 0.5 x 10 x 22 - 0.5 x 6 x 12
= 110 - 36
= 74 square yd
6.
= 0.5 x π x 3 x 3 + 0.5 x 6 x 11
= 14.14 + 33
= 47.1 square m
7.
= 18 x 6 - 2 x π x 2 x 2
= 108 - 25.13
= 82.8 square m
8.
= 4 x 16 + 0.5 (16 + 10) x (8 - 4)
= 64 + 52
= 116 square cm
9.
= 18 x 8 - 4 * 0.5 x 4 x 4
= 144 - 32
= 112 square cm
10.
= [0.5 (7 + (9 + 3)) x (15 + 6 - 17)] + [(17 - 6) x (9 + 3)] + [6 x 9]
= 38 + 132 + 54
= 224 square cm
Learn more about area of composite shapes at
https://brainly.com/question/26642678
#SPJ1
An angle is two collinear rays with a common endpoint. Find an example that contradicts this definition. How would you change the definition to make it more accurate?
Opposite rays can be defined as a figure formed by two collinear rays with a common endpoint, since the two rays lie on the same line.
Reyna has 5 crowns worth 10 cents each and 4 coins worth 25 cents each. If she chooses two of these coins at random, what is the probability that the two coins combined will be worth at least 35 cents? 
PLEASE I NEED HELP!!!
Answer:
1 crown and 1 coin
Step-by-step explanation:
1 crown =10 cents
1 coin = 25 cents
10 +25 = 35
A cylindrical can holds three balls. The balls touch the top, bottom and sides of the can. The radius of one ball is 6 cm. Find the volume of the remaining space inside the cylinder. Use 3.14 for π. please someone help me.
Answer:
16286.01632
Step-by-step explanation:
V=πr2h=π·122·36≈16286.01632
Carmine mixes 2. 8 pounds of cashews with almonds to make a trail mix. He divides the trail mix into 5 equal portions. Each portion weighs 1. 5 pounds. Which equation and solution shows the total amount of almonds he used in the mixture?
According to the equation, Carmine used 4.7 pounds of almonds in the mixture.
To represent this relationship mathematically, we can use an equation. Let's use "a" to represent the weight of the almonds in pounds. Then, we can write:
2.8 + a = total weight of the trail mix
We can then solve for "a" by subtracting 2.8 from both sides of the equation:
a = total weight of the trail mix - 2.8
We also know that the trail mix is divided into 5 equal portions, each weighing 1.5 pounds. Therefore, the total weight of the trail mix is:
total weight of the trail mix = 5 * 1.5
total weight of the trail mix = 7.5
Substituting this value into the equation we derived earlier, we get:
a = 7.5 - 2.8
a = 4.7
To know more about equation here
https://brainly.com/question/10413253
#SPJ4
The perimeter of a rectangle is 80 inches. The
length of the rectangle is 12 inches.
Which equation could represent the width of the
rectangle, w?
Answer:
Step-by-step explanation:
I don’t know what to do
what is b equal too?[tex]441+b^{2} =3011.81[/tex]
Based on the equation 441 + b² = 3011.81, the value of b is equal to 50.7032.
What is an exponent?In Mathematics, an exponent is a mathematical operation that is typically used in conjunction with an algebraic expression in order to raise a quantity to the power of another.
This ultimately implies that, an exponent is represented by the following mathematical expression;
bⁿ
Where:
the variables b and n are numerical values (numbers) or an algebraic expression.n is referred to as a superscript or power.Based on the given equation, we have the following;
441 + b² = 3011.81
By subtracting 441 from both sides of the equation, we have the following:
441 + b² - 441 = 3011.81 - 441
b² = 3011.81 - 441
b² = 2570.81
b = √2570.81
b = 50.7032.
Read more on exponent here: https://brainly.com/question/27858496
#SPJ1
Find D and write answer in simplest radical form
The length or value of d is 3m
What is meant by length?
Length is a measurement of how long something is, typically referring to the longest dimension of an object or space. It is a fundamental physical quantity and can be measured in various units, such as meters, feet, or inches. Length is important in many fields, including mathematics, science, and engineering.
According to the given information
In a right-angled triangle, the side opposite to the 90-degree angle is called the hypotenuse. The side opposite to the 60-degree angle is equal to the hypotenuse multiplied by the square root of 3 divided by 2. Since AC is the hypotenuse and its length is given as 2*(√(3))m, we can find the length of BC (d) as follows:
d = (AC * √(3)) / 2 d = (2 * √(3) * √(3)) / 2
d = 3m
To know more about length visit
brainly.com/question/29868754
#SPJ1
What is the area of this figure?
Enter your answer in the box.
The area of the irregular polygon is equal to 30.5 square units.
How to determine the area of a polygon
In this problem we find the representation of an irregular pentagon, that is, a polygon of five sides of different length. Whose area can be found by adding the areas of rectangles and triangles:
Rectangle
A = b · h
Triangle
A = 0.5 · b · h
Where:
A - Areab - Baseh - HeightNow we proceed to determine the area of the irregular polygon:
A = 0.5 · 1 · 4 + 0.5 · 3 · 2 + 2 · 4 + 0.5 · 3 · 2 + 3 · 4 + 0.5 · 5 · 1
A = 2 + 3 + 8 + 3 + 12 + 2.5
A = 30.5
To learn more on areas of polygons: https://brainly.com/question/22052844
#SPJ1
Ms. Roberts selected 4 3/4 pounds of grapes. The grapes cost $2.50 per pound. How much will Ms. Roberts pay for the grapes?
Ms. Roberts will pay $9.375 for the grapes.
We have,
To calculate the cost of the grapes, you can multiply the weight of the grapes by their price per pound.
Weight of grapes = 4 3/4 pounds
Price per pound = $2.50
Total cost of grapes = (4 3/4 pounds) x ($2.50/pound)
First, we need to convert the mixed number 4 3/4 to an improper fraction:
= 4(3/4)
= (4 x 4 + 3)/4
= 19/4
Now, we can multiply:
Total cost of grapes = (19/4) x ($2.50/pound)
Simplifying the fractions:
Total cost of grapes = $9.375
Therefore,
Ms. Roberts will pay $9.375 for the grapes.
Learn more about fractions here:
https://brainly.com/question/24370499
#SPJ1
the health care provider prescribes cefazolin 550 mg intramuscularly to a client. The nurse dilutes a 2-g vial of cefazolin (Ancef) with 3 mL of diluent to yield a volume of 3.2 mL. How many mL should the nurse administer if the physician orders 550 mg IM? Type the correct answer in the blank.
The nurse should administer 0.88 mL of the cefazolin solution for the 550 mg IM dose.
To determine the number of mL to administer for the 550 mg IM dose of cefazolin, follow these steps:
Determine the concentration of cefazolin per mL:
- You have a 2-g (2000 mg) vial of cefazolin that was diluted with 3 mL of diluent, yielding a total volume of 3.2 mL.
- Divide the total amount of cefazolin (2000 mg) by the total volume (3.2 mL) to find the concentration per mL: 2000 mg / 3.2 mL = 625 mg/mL.
Calculate the volume needed for the 550 mg dose:
- Divide the prescribed dose (550 mg) by the concentration per mL (625 mg/mL):
550 mg / 625 mg/mL = 0.88 mL.
For similar question on cefazolin.
https://brainly.com/question/30258181
#SPJ11
The nurse should administer 0.88 mL of the cefazolin solution intramuscularly to the client.
To determine the mL to administer for the 550 mg IM order of cefazolin, follow these steps:
1. Calculate the concentration of cefazolin in the solution:
- 2,000 mg (2-g vial) of cefazolin is diluted with 3 mL of diluent, yielding a volume of 3.2 mL.
- Concentration = (2,000 mg) / (3.2 mL) = 625 mg/mL
2. Determine the volume needed for the 550 mg prescribed dose:
- Volume = (Prescribed Dose) / (Concentration)
- Volume = (550 mg) / (625 mg/mL) = 0.88 mL
Cefazolin is an antibiotic used to treat various bacterial infections. The dosage of cefazolin depends on the type and severity of the infection, as well as the patient’s weight, age, and kidney function12. The usual adult dose for mild to moderate infections ranges from 250 mg to 1 g every 6 to 12 hours
The nurse should administer 0.88 mL of the cefazolin solution intramuscularly to the client.
to learn more about Volume click here:
https://brainly.com/question/28338582
#SPJ11
Can you pls help? This is geometry
Answer:
(x+2)^2+(y-5)^2=81
Step-by-step explanation:
standard form equation is (x-h)^2+(y-k)^2=r^2
so, input the values:
(x+2)^2+(y-5)^2=9^2
simplify:
(x+2)^2+(y-5)^2=81
which statement correctly compares the dight 5 in the number 89.059 and 78.365
The digit 5 in 89.059 is greater than the digit 5 in 78.365.
To compare the digit 5 in the numbers 89.059 and 78.365, we need to look at the place value of the digit 5 in both numbers. In 89.059, the digit 5 is in the thousandth place, while in 78.365, the digit 5 is in the hundredth place.
Since the digit 5 in the thousandth place has a greater place value than the digit 5 in the hundredth place, it means that the digit 5 in 89.059 is greater than the digit 5 in 78.365.
To understand this concept better, consider the place value system of decimal numbers, where each digit represents a specific place value. The rightmost digit represents the units, the next digit to the left represents the tens, and so on.
Moving leftwards, each digit's place value increases by a factor of 10. Thus, the digit 5 in the thousandth place has a place value of 0.001, which is greater than the place value of the digit 5 in the hundredth place, which is 0.01. Therefore, the digit 5 in 89.059 is greater than the digit 5 in 78.365.
To know more about number place value follow
https://brainly.com/question/28726939
#SPJ1
Mona loves making beaded necklaces. Today, she has a string that is 20 centimeters long. She leaves 2 centimeters on each end. Then, she fills the rest of the string with little beads that are 4 millimeters wide. How many little beads will she need?
Answer:
40 beads
Step-by-step explanation:
First, let's find the length of string that the beads will be on.
The string is originally 20 cm, but 2 cm is taken off each side.
So, the string that the beads will be on is only 16 cm now.
Each bead is 4 mm wide, so we have to convert the bead width to centimeters.
4/10=0.4
So each bead is 0.4 cm.
Now to find how many beads will fit, we have to divide the length by the width of the bead.
16/0.4=40
So, Mona will need 40 beads. Hope this helps ;)
Fill in the blanks. 8 x 12 = 8 x (10 + ?) = (8 x 10) + (8 x ?) = 80 + ? = ?
(i need help on the question marks)
i dont rlly understand this if someone wants to help
The value of one square in each sample is:
(a) 2
(b) 6
(c) 3
(d) 5
How to determine the value of one square in each sample?
Let x represent the value one square. Thus, the value of one square in each sample can be determined as follow.
(a) 2x + 1 = 5 (Left side is equal to right side)
2x = 5 - 1
2x = 4
x = 4/2
x = 2
(b) 10 = x + 2 + 2
10 = x + 4
x = 10 - 4
x = 6
(c) 5 + 1 + x = 9
6 + x = 9
x = 9 - 6
x = 3
(d) 25 = 5x
x = 25/5
x = 5
Learn more about square on:
https://brainly.com/question/24487155
#SPJ1
Can someone please help me ASAP? It’s due today!!
A. Method 1
B. Method 1 and 2
C. Method 2
D. Method 3
Based on the information, we can infer that the most accurate method would be method 3 because it randomly selects the participants without any preference.
What would be the most appropriate method for this survey?The most appropriate method for this survey would be method three (option D) because it will have a group of people who were chosen randomly. This means that people can have different ranges of age, gender, preferences, among others.
This is important because they will represent all the diversity of characteristics of the public, which will allow a study in this population to be more accurate.
Learn more about methods at: https://brainly.com/question/14560322
#SPJ1