(a) 21/144 probability of selecting 1 red and 2 black. (b) 35/144 probability of selecting 2 black. (c) 61/144 probability of selecting 2 same color.
What is probability ?
Probability is a measure of the likelihood of an event occurring, expressed as a number between 0 and 1, with 0 indicating that the event will not occur and 1 indicating that the event will occur with certainty. The probability of an event can also be expressed as a percentage or a fraction. It is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.
(a) The probability of selecting one red and two black balls is (3/12) * (7/12) * (7/12) = 21/144.
(b) The probability of selecting exactly two black balls is (7/12) * (7/12) * (5/12) = 35/144.
(c) The probability of selecting exactly two balls of the same color is (3/12) * (3/12) + (2/12) * (2/12) + (7/12) * (7/12) = 61/144.
(a) 21/144 probability of selecting 1 red and 2 black. (b) 35/144 probability of selecting 2 black. (c) 61/144 probability of selecting 2 same color.
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PLEASE HELP MEEE!!! WILL GIVE BRAINLIEST!!
A figure is transformed according to the rule (x,y)= (x-1,y+4). Describe exactly what type of transformation has taken place.
Answer:
The transformation described is a horizontal translation of 1 unit to the left and a vertical translation of 4 units up. The transformation moves every point on the x-axis one unit to the left and every point on the y-axis four units up.
Step-by-step explanation:
It can also be thought of as a transformation that shifts the entire figure one unit to the left and four units up.
First Bank Credit Card
- No interest for 6 months. < $1000
- $10 fee per year
Will wants to buy a new TV for $900. What is the minimum payment that she must pay each month to avoid paying interest on her credit card?
(please answer jojosiwa needs help)
The minimum monthly payment so that she avoids paying interest on the credit card is given as follows:
$150
How to obtain the minimum monthly payment?The minimum monthly payment is obtained applying the proportions in the context of this problem.
The interest-free period is given as follows:
6 months, as long as the purchase has a value that is less than $1000.
(as stated in the problem).
The value of the TV is given as follows:
$900.
(as stated in the problem).
The minimum monthly payment is obtained with the division of the value of the TV by the length in months of the interest free period, as follows:
Minimum payment = 900/6
Minimum payment = $150.
(this is the proportion that is applied in this problem).
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ace pharmaceutical has developed a drug that it believes will help lower cholesterol and blood pressure at a significantly greater rate than fish oil. researchers wish to test the new drug and compare the results to those of fish oil and of a placebo. a total of 300 volunteers suffering from hypertension and high cholesterol will participate in the study. part a explain how you would carry out this test in a completely randomized experiment.
The subjects would be randomized at random to receive the new medication, fish oil, or a placebo. The effectiveness of the new variance medicine would next be evaluated by comparing the outcomes of the various therapies.
The test would be conducted using a completely randomized experiment. This means that the 300 volunteers would be randomly assigned to the three different treatments: the new drug, fish oil, or the placebo. This ensures that any differences between the groups can be attributed to the treatments, and not any other factor. The volunteers would be monitored for a period of time, and the results of the treatments would be compared to determine the effectiveness of the new drug. This could be done through measuring changes in cholesterol and blood pressure levels, as well as any side effects of the treatments. In addition, the volunteers’ health and dietary habits should be monitored to ensure that any differences between the treatments are not caused by any other factors.
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Find the area of the following figure. Pictures are not drawn to scale. Round answers to the nearest tenth.
The area of the trapezium is 36.3 unit squared.
How to find area of a figure?The figure above is a trapezium. Therefore, the area of a trapezium can be represented as follows:
Hence,
area of a trapezium = 1 / 2 (a + b)h
where
h = heighta and b are the top and base of the trapeziumTherefore,
area of a trapezium = 1 / 2 (a + b)h
where
a = 4b = 7 + 1.5 = 8.5Using Pythagoras's theorem,
c² = a² + b²
where
a and b are the legsc is the hypotenuseh² = 6² - 1.5²
h²= 36 - 2.25
h = √33.75
h = 5.80947501931
h = 5.81
Therefore,
area of the trapezium = 1 / 2 (4 + 8.5)5.8
area of the trapezium = 1 / 2 (12.5)5.8
area of the trapezium = 72.5 / 2
area of the trapezium = 36.3 units²
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3/5 + 5/7 = ____
6/12 + 9/12 ____
1/4 + 4/4 = ____
2/3 + 5/3 = ____
(fractions)
Answer:
1. 46/35 or 1 11/35
2. 5/4 or 1 1/4
3. 5/4 or 1 1/4
4. 7/3 or 2 1/3
Step-by-step explanation:
a disabled sailboat is drifting in a straight line at 4 miles per hour. a coast guard rescue craft is trailing it by 11 miles, moving along the same path at a rate of 29 miles per hour. how long will it be before the rescue craft reaches the sailboat?
It will take the rescue craft 0.44 hours or 26.4 minutes to reach the sailboat.
The time required for the rescue craft to reach the sailboat can be calculated by using the formula for relative velocity:
Relative Velocity = Velocity of the Rescue Craft - Velocity of the Sailboat
= 29 mph - 4 mph = 25 mph
Therefore, the time required for the rescue craft to reach the sailboat is given by:
time= Distance/Relative Velocity
= 11 miles/25 mph
= 0.44 hours
Therefore, it will take the rescue craft 0.44 hours or 26.4 minutes to reach the sailboat.
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Can anyone help me with this question?
Answer:
A. Yes, opposite sides are congruent.
Step-by-step explanation:
For B, you can't necessarily tell if they are right angles because there is nothing indicating that it is. For C, just because angle measures aren't given doesn't mean that they aren't congruent. For D, sure it could be a rhombus although it doesn't look like it but rhombuses' are parallelograms.
the backyard if a new home is shaped like a trapezoid with a height of 40 ft and bases of 73 ft and 111 ft. what is the cost of putting sod on the gard, if the landscaper charge 23 cent per square foot for sod
The cost of putting sod on the gard, given the area of the trapezoid backyard of the new home, is $ 864 . 40
How to find the area of a trapezoid ?The backyard of the new home is said to be shaped like a trapezoid which means that the cost of putting sod on the gard can be found by checking for the area of the trapezoid.
The area of a trapezoid can be found by the formula :
= (( Base A + Base B ) x height ) / 2
= ( ( 73 + 111 ) x 40 ) / 2
= 3, 680 square feet
The cost of putting sod on the gard is therefore:
= Area of the backyard x cost per square foot of sod
= 3, 680 x 0. 23
= $ 864 . 40
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In the figure, point $A$ is the center of the circle, the measure of angle $RAS$ is 74 degrees, and the measure of angle $RTB$ is 28 degrees. What is the measure of minor arc $BR$, in degrees
In circle A, angle RAS is 74 degrees and angle RTB is 28 degrees. The measure of minor arc BR is 81 degrees.
The figure is in the attached picture.
Notice that:
AS = AR = radii of the circle.
Hence, triangle SAR is an isosceles triangle, and ∠ASR = ∠ARS.
The sum of angles in a triangle is 180°.
Therefore,
∠ARS + ∠ASR+ 74° = 180°
Since ∠ASR = ∠ARS,
2∠ARS + 74° = 180°
2∠ARS = 106°
∠ARS = 53°
and
∠ASR = ∠ARS = 53°
Angle in a straight line:
∠AST + ∠ASR = 180°
∠AST = 180° - ∠ASR = 180° - 53° = 127°
Refer to triangle SAT:
∠SAT = 180° - 28° - 127° = 25°
The measure of minor arc BR = ∠RAB
∠RAB = 180° - 74° - 25°
∠RAB = 81°
The picture in your question is missing, but most likely it was in the attached picture.
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Need help 30 points....
in triangle abc, the measure of the largest angle is 32 less than 3 times the smallest angle. the measure of the middle angle is 8 more than half the measure of the largest angle. what is the measure of the middle angle? _______ degrees
The measure of the middle angle of triangle abc is 52°
Let the largest angle of triangle be x, the smallest angle be z, and the third angle be y.
Given that the measure of the largest angle is 32 less than 3 times the smallest angle.
So, we get an equation,
x = 3z - 32 ............(1)
Also, the measure of the middle angle is 8 more than half the measure of the largest angle.
So, we get an equation,
y = 8 + (x/2) .......(2)
From equation (1),
z = (x + 32)/3 ..........(3)
We know that the sum of all angles of triangle is 180 degrees.
x + y + z = 180
Substitute the values of y and z in above equation.
x + 8 + (x/2) + (x + 32)/3 = 180
6x + 48 + 3x + 2(x + 32) = 1080
9x + 48 + 2x + 64 = 1080
11x + 112 = 1080
11x = 1080 - 112
11x = 968
x = 88
Substituting above value of x in equation (2)
y = 8 + (88/2)
y = 8 + 44
y = 52 degrees
Therefore, the middle angle of triangle measures 52 degrees.
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A craft store buys 150 feet of satin ribbon for $13.50. The store sells the ribbon by the foot. A customer can purchase 5 feet of ribbon for $0.80. How much profit does the craft store earn on each foot of ribbon?
The profit per foot of the satin ribbon that the craft store buys and sells is $0.80.
How is the profit determined?The profit generated by the craft store per foot is determined by reducing the transactions to their unit cost and price.
The profit per unit becomes the difference between the unit selling price and the unit cost.
In other words, the profit per unit is the unit rate (per-unit profit) or ratio obtained as a difference between two unit parameters.
The cost of buying 150 feet of satin ribbon = $13.50
The unit cost per foot = $0.09 ($13.50/150)
The sales price for 5 feet = $0.80
The unit selling price per foot = $0.16 ($0.80/5)
The profit per unit = $0.80 ($0.16 - $0.80)
Profit percentage = 100% ($0.80/$0.80 x 100)
Thus, we can conclude that the craft store generates a 100% profit or $0.80 per foot.
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The coefficient of x^7 in the expression (x^3+4/x^2)^4 is
The coefficient of x⁷ in the given expression is 16.
What are Expressions?Expressions are mathematical statements which consist of two or more terms and terms are connected to each other using mathematical operators like addition, multiplication, subtraction and so on.
Given is the expression [x³ + (4 / x²)]⁴.
[x³ + (4 / x²)]⁴ = (x³ + 4x⁻²)⁴
= (x³ + 4x⁻²)² (x³ + 4x⁻²)²
= (x⁶ + 8x + 16x⁻⁴) (x⁶ + 8x + 16x⁻⁴)
= x¹² + 8x⁷ + 16x² + 8x⁷ + 64x² + 128x⁻³ + 16x² + 128x⁻³ +
256x⁻⁸
Rearranging with like terms, we get,
= x¹² + 16x⁷ + 96x² + 256x⁻³ + 256x⁻⁸
Hence the coefficient of x⁷ is 16.
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How do you prove theorem 8.9 Class 9?
In the triangle the line segment joining the midpoints 'S' and 'T' of the sides PQ and PR implies that ST || QR.
As given in the question,
Diagram is attached.
As per the attached diagram we have,
Given : In triangle PQR with midpoints S and T of sides PQ and PR respectively.
To prove : ST is parallel to QR.
Proof : First construct a line through R parallel to PQ such that it meet the extended line of ST at point 'U'
In triangle PST and triangle RTU,
PQ|| RU and SU is the transversal
∠PST ≅ ∠RUT ( alternate angles )
∠PTS ≅ ∠RTU ( vertically opposite angles)
PT ≅TR ( 'T' is the midpoint of PR )
By AAS we have
ΔPST ≅ΔRTU
By congruent part of congruent triangle we have,
PS ≅ RU
⇒ SQ ≅ RU
In quadrilateral QSUR,
SQ ≅ RU
SQ || RU ( as PQ || RU by construction )
Quadrilateral with one pair of opposite side congruent and parallel implies it is a parallelogram.
Quadrilateral QSUR is a parallelogram.
⇒ SU || QR
S - T - U
⇒ ST is parallel to QR
Therefore, in the given triangle line segment formed by joining the midpoints of the other two sides is parallel to third side.
The above question is incomplete , the complete question is :
Prove theorem 8.9 : The line segment joining the midpoints of the two sides of the given triangle is parallel to the third side .
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this is a late assignment and I am really close to failing please help
Answer: 14.825
Step-by-step explanation:
First , do 2 * 5.3 because it's 2a, you'll have to do 2 * a. This equals 10.6.
Second, you'll need to do 5.3 * 1.25. Why? Because in the problem you need to do a * b, which is that. It equals 6.62500.
Lastly, put it all together! 10.6 + 6.62500 - 2.4 equals 14.825.
19>15+x I am so confused and need help for homework.
Answer: x<4
Step-by-step explanation:
19>15+x
4>x
x<4 is the answer
Answer:
Since 15+x is less than 19. 15+x cannot equal to or greater than 19. If x is greater or equal to 4, the answer will be equal to or greater than 19 which is not true for the equation shown above.
So x is less than 4.
what is the probability that the average electric service paid by the sample of electric service customers will exceed $170? show your work.
a) According to the central limit theorem, the mean is $142 and the standard deviation is $0.7488.
b) Nearly normal according to the central limit theorem.
c) 0.0901 = 9.01% probability that the average cable service paid by a sample of cable service customers exceeds $170 in the central limit theorem.
Normal probability distribution:
The normal probability distribution, discovered by Abraham De Moivre in 1733, approximates the binomial probability distribution when a particular experiment has a very large number of trials. In 1774 Laplace studied the mathematical properties of the normal probability distribution. By historical error, the discovery of the normal distribution was attributed to Gauss, first mentioned in his 1809 paper. In the 19th century, many scientists discovered that measurement errors in a particular experiment followed a pattern (usual error curve). ), which was very well approximated by this probability distribution.
Central Limit Theorem:
The central limit theorem is a statistical theory that for large sample sizes with finite variance, samples are normally distributed and the mean of the sample is approximately equal to the mean of the entire population.
According to the Question:
The average monthly charge is $142 with a standard deviation of $29.
This is μ = 142 and σ = 29
Part a:
The mean and standard deviation of the sampling distribution of x to show your research and support your argument:
1500 samples (over 30).
According to the Central Limit Theorem
The mean is 142 $
The standard deviation is s = [tex]\frac{29}{\sqrt{1500} }[/tex] = 0.7488
Part b:
Shape of sampling distribution of X.
Due to the large sample size, the shape of the sample distribution is almost normal. According to the central limit theorem, which states that the sampling distribution converges to the normal distribution as the sample size increases. Mean ~ N(142, 0.749²)
Part C:
The probability that the average cable service paid by a sample of cable service customers exceeds $170.
Therefore, by the central limit theorem, the p-value of Z when X= 170
Z = x - μ/ σ
By the Central Limit Theorem:
Z = 170 - 142 / 0.7488
= 28/ 0.7488
= 37.34 exceeds 0.9099
Using the Z probability calculator :
P(Z > 1.335) = 0.09093
Complete Question:
The amount people pay for cable service varies quite a bit but the mean monthly fee is $142 and the standard deviation is $29. the distribution is not normal many people pay about $76 for basic cable and about $160 for premium service but some pay much more. a sample survey is designed to ask a simple random sample of 1,500 cable service customers how much they pay. let x hat be the mean amount paid.
Part a: what are the mean an standard deviation of the sample distribution of x hat show your work and justify your reasoning.
Part b: what is the shape of the sampling distribution of x hat justify your answer.
Part C: what is the probability that the average cable service paid by the sample of cable service customers will exceed $170? show your work.
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◄) A large square is composed of 16 smaller squares that are all the same size. Each of the small squares has an area of 4 square units. What is the side length of the large square?
Answer:
8
Step-by-step explanation:
Each of the small squares has an area of 4 square units
so its length is 2 because 2*2 =4
so 4 small squares = 8 each side
What is the volume, in cubic inches, of the cone below?
Answer:
27π
Step-by-step explanation:
Volume = 1/3πr²h
=1/3*(3)²9π
=27π
a bag contains ten balls, some of which are red and the rest of which are yellow. when two balls are drawn at random at the same time, the probability that both balls are red is $\frac{1}{15}$. how many balls in the bag are red?
On solving the provided question we can say that Probability of Red * Second Draw Probability of Red = [tex]3 / 10 * 2 / 9 = 6 / 90 = 1 / 15[/tex]
What is probability?Probability theory, a subfield of mathematics, gauges the likelihood of an occurrence or a claim being true. An event's probability is a number between 0 and 1, where approximately 0 indicates how unlikely the event is to occur and 1 indicates certainty. A probability is a numerical representation of the likelihood or likelihood that a particular event will occur. Alternative ways to express probabilities are as percentages from 0% to 100% or from 0 to 1. the percentage of occurrences in a complete set of equally likely possibilities that result in a certain occurrence compared to the total number of outcomes.
Let the number of red balls = x
[tex][x / 10] * [ (x - 1) / 9 ] = 1/15 \\x(x - 1) / 90 = 1/15 \\x ( x - 1) = 6 \\x^2 - x - 6 = 0 \\(x -3) ( x + 2) = 0 \\x = 3 or x = -2[/tex]
here are 3 red balls
Probability of Red * Second Draw Probability of Red
[tex]3 / 10 * 2 / 9 = 6 / 90 = 1 / 15[/tex]
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you are driving on a highway and are about 140 miles from a state border. you set your cruise control at 60 miles per hour and plan to turn it off within 30 miles of the border on either side. find the minimum and maximum numbers of hours you will have cruise control on.you will travel at least hour(s) and at most hour(s) with cruise control on.
The minimum number of hours you will have cruise control on is 1.83 hour(s) and the maximum is 2.83 hour(s).
To find the minimum and maximum numbers of hours you will have cruise control on, you need to calculate the distance you will travel with cruise control on and divide it by your speed.
The minimum distance you will travel with cruise control on is
140 miles - 30 miles = 110 miles.
The maximum distance you will travel with cruise control on is
140 miles + 30 miles = 170 miles.
To convert these distances into hours, you will divide them by your speed of 60 miles per hour.
Minimum hours: 110 miles / 60 mph = 1.83 hours
Maximum hours: 170 miles / 60 mph = 2.83 hours
Therefore, the minimum number of hours you will have cruise control on is 1.83 hour(s) and the maximum is 2.83 hour(s).
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(02.05 HC)
The functions f(x) = -(x + 4)2+2 and g(x) = (x - 2)2-2 have been rewritten using the completing-the-square method. Apply your knowledge of
functions in vertex form to determine if the vertex for each function is a minimum or a maximum and explain your reasoning
X544
ΩΣ
For a quadratic function [tex]y=ax^2+bx+c[/tex], we know the vertex of the graph is a maximum if and only if [tex]a < 0[/tex], and a minimum if and only if [tex]a > 0[/tex].
It is easy to see that for a function of the form [tex]y=a(x-h)^2+k[/tex], the vertex of the graph is a maximum if and only if [tex]a < 0[/tex], and a minimum if and only if [tex]a > 0[/tex].
Therefore, the vertex of the graph of [tex]f(x)[/tex] is a maximum, and the vertex of the graph of [tex]g(x)[/tex] is a minimum.
I need help with division 3,340 divided by 8
Answer: 42.5
Step-by-step explanation:
8 multipled by 42.5 is 340. A strategy i use is multiply 8 by 5 or 10, for example 8 times 5 is 40, so i know that 8 times 50 is 400, that tells you the answer you need is just a little below 50
Which algebraic expression is equivalent to 9(4x + 8) - 4
Answer: 36x + 68
Step-by-step explanation:
Expanding it, you get:
36x + 72 - 4
= 36x + 68
Given the following exponential function, identify whether the change represents growth or decay, and determine the percentage rate of increase or decrease.
y=88(0.977)^x
3% is the percentage rate of increase or decrease.
What does exponential decay mean?
A process known as exponential decay describes how a quantity depletes over time, with the rate of depletion become proportionately slower as the quantity shrinks. Finding the exponential drop—a rapid reduction over time—is made easier by the exponential decay formula.
The exponential decay formula is used to calculate various types of decay, including radioactivity decay, half-life, and population decay. The formula for f(x) is f(x) = a (1 - r)x.
The formula for exponential decay is y=a(1-r)x.
r is the decay rate, expressed as a decimal.
In this case, r = .03 which represents 3%
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two ice cream machines make a total of 320 gallons in a certain amount of time. working together for the same length of time, how many gallons of ice cream can each number of machines make? 3 ice cream machines
3 ice cream machines will make a total of 480 gallons for the same length of time and 4 ice cream machines will make a total of 640 gallons for the same length of time.
For the quantity 3 ice cream machines will make.
2 ice cream machines produce a total of 320 gallons in a certain amount of time.
If 2 ice cream machines can make a total of 320 gallons. Then,
3 ice cream machines will produce a total of x gallons in the same amount of time
x = (320 × 3)/2
x = 480 gallons
Hence, 3 ice cream machines will produce a total of 480 gallons.
For the quantity 4 ice cream machines will make.
If 2 ice cream machines can make a total of 320 gallons. Then,
4 ice cream machines will produce a total of y gallons in the same amount of time
y = (320 × 4)/2
y = 640 gallons
Hence, 4 ice cream machines will produce a total of 640 gallons.
--The given question is incomplete, the complete question is
"Two ice cream machines make a total of 320 gallons in a certain amount of time. Working together for the same length of time, how many gallons of ice cream can each number of machines make?
3 ice cream machines
4 ice cream machines"--
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The list shows numbers in order from least to greatest. -15, -3 4/5, -1.5, ____, 2.3, 5 2/3Which is an integer that can be inserted on the blank line in the list?a.-2 b. -1 1/3 c. 0 d. 1.2
An integer that can be inserted on the blank line in the list from the given options is 0.
Therefore the answer is c) 0.
The list shows numbers in order from least to greatest, that is ascending order -15, -3 4/5, -1.5, ____, 2.3, 5 2/3
The integer that can be inserted on the blank line in the list is c. 0, because it is greater than -1.5 and less than 2.3 and it is an integer.
-2 is less than -1.5. So they cannot be the answer. -1 1/3 is equal to -4/3 and 1.2 is greater than -1.5 and less than 2.3, but they are not integers.
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a triangular parcel of land has 114 meters of frontage, and the other boundaries have lengths of 70 meters and 95 meters. what angles does the frontage make with the two other boundaries? (round your answers to one decimal place.)
Use law of cosines to find angles A, B, and C. Angle A = X°, B = Y° and C = Z°.
What is triangle ?
A triangle is a polygon with three sides and three angles. The sum of the three angles in a triangle always equals 180 degrees. Triangles can be classified based on the length of their sides or the measure of their angles.
We can use the law of cosines to find the angles. The law of cosines states that for any triangle, the square of one side length is equal to the sum of the squares of the other two side lengths, minus twice the product of the other two side lengths multiplied by the cosine of the angle opposite the first side.
Let A, B, and C be the angles opposite the sides of length 114 meters, 70 meters, and 95 meters, respectively.
We can use the following equation to find angle A:
cos A = (70^2 + 95^2 - 114^2) / (2 * 70 * 95)
Once we have the value of cos A, we can use the inverse cosine function to find the angle A in degrees.
Similarly, we can use the same formula to find the angle B and C.
cos B = (114^2 + 95^2 - 70^2) / (2 * 114 * 95)
cos C = (114^2 + 70^2 - 95^2) / (2 * 114 * 70)
Use law of cosines to find angles A, B, and C. Angle A = X°, B = Y° and C = Z°.
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What is 1800 * ? * 1 = 198
1800 * ? * 1 = 198
let x be the ?
By shifting 1800*1 into right hand side
x= 198/1800
x= 11/100= 0.11
Final answer = 0.11
What is formula data type?
Formula data type is used to determine different values based on a variety of fields in the existing table.
It also helps to create a pattern that takes input from all the fields and gives you the final value. Other fields include constants or functions and by using formula data type, you can remove the need to repeatedly enter the same information again and again. It also eliminated the margin of error that could occur during manual entry in the entirety of your work. Formula data type is used to help solve a combination of different equations that have different fields and/or equations.
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Which value could be substituted for the variable to make the equation
TRUE? w-11 =15
Answer:
26 - 11 = 15
Step-by-step explanation:
