let x = number of heavy equipment operators employed
38 - x = number of laborers employed
133x + 84(38 - x) = 4172
133x + 3192 -84x = 4172
49x = 980
x = 20
number of heavy equipment operators employed = 20
38 - 20 = 18
number of laborers employed = 18
express this number in scientific notation 2,000,000
Answer:
In scientific notation the number would be 2×10^6.
Hope it helps!
a sector of a circle is created from a central angle with a measure of 60 . if the diameter of the circle is 6 inches, what is the area of the sector?
The area of the sector created by a central angle of 60° in a circle with a diameter of 6 inches is approximately 4.7124 square inches.
To find the area of a sector of a circle, we need to know the central angle and the radius of the circle. In this case, we are given the central angle of 60° and the diameter of the circle, which we can use to find the radius.
The diameter is given as 6 inches, so the radius is half of that, which is 3 inches.
To calculate the area of the sector, we can use the formula:
Area of Sector = (θ/360°) * π * r²
where θ is the central angle in degrees, π is a mathematical constant approximately equal to 3.14159, and r is the radius.
Plugging in the values:
Area of Sector = (60°/360°) * π * (3)²
Area of Sector = (1/6) * 3.14159 * 9
Area of Sector ≈ 4.7124 square inches
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Someone help me please
(Law of cosines)
Answer:
Step-by-step explanation:
A man invests some money at 10% interest for 1 year
After 1 year it is worth £3300
How Much did he invest?
FOR BRAINLY PLEASE INCLUDE A STEP BY STEP
Answer:
investment=£3000
Step-by-step explanation:
let ; principal amount (investment)=p ,
simple interest = p*t*r/100
£3300-p=p*1*10/100
(3300-p)100/10= p
33000-10p=p
33000=11p
33000/11 = p
£3000=p
Find the solution of y = 6x + 1 for x = 5
Answer:
y equals to 31
Step-by-step explanation:
6(5) = 30
30+1 = 31
The weight of a soccer ball is normally distributed with a mean of 0. 43 kg and a standard deviation of 0. 01 kg. Suppose 800 different soccer balls are in a warehouse. About how many soccer balls weigh more than 0. 45 kg?.
About 20 soccer balls weigh more than 0.45 kg.
In general, 0.43 kg. 0.43 plus 0.1 plus 0.1 is 0.45, or two standard deviations more.
Balls that weigh less than 0.45 kg are all below the mean by 50%, and those that are two standard deviations above 95%/2=47.5% 50%+47.5% =97.7%.
2.5% of balls weighing greater than 0.45 kg (100% minus 97.7%)
2.3%=0.025
20 soccer balls weighing more than 0.45 kg are 800*0.025.
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One year ago, the ratio of Honey and Piyush ages was 2:3 respectively. After five years from now, this ratio becomes 4:5. How old is Piyush now?
Answer:
eşnatto eşmatoroorlfld
Answer:
Now , Piyush age =3+Honey age
Step-by-step explanation:
Honey age=x
Piyush age=y
1 year ago,Honey age=x-1
Piyush age=y-1
the ratio of Honey and Piyush age=2:3
x-1:y-1=2:3
x-1/y-1=2/3
3(x-1)=2(y-1)
3x-3=2y-2
3x-2y= -2+3
3x-2y=1 eq _1
after 5 years from now,
Honey age=x+5
Piyush age=y+5
the ratio of them=4:5
x+5/y+5=4/5
5(x+5) =4(y+5)
5x+25=4y+20
5x-4y=20-25
5x-4y=-5 _eq2
eq1and 2_
5x-4y= -5
3x-2y= 1
-
2x-2y=-6
x-y =-3
-y=-3-x
y=3+x
Perform the indicated operation and reduce to lowest term.−16/5 ⋅ (−15/56)
By reducing −16/5 ⋅ (−15/56) in lowest term, the answer is 6/7.
To perform the indicated operation and reduce the result to lowest terms, we need to multiply the two fractions:
(-16/5) x (-15/56) = (16 x 15) / (5 x 56)
(when we multiply two negative numbers, the result is positive)
= 240 / 280
Now we can simplify this fraction by dividing both the numerator and the denominator by their greatest common factor, which is 40:
240 / 280 = (240 ÷ 40) / (280 ÷ 40) = 6/7
Therefore, -16/5 ⋅ (-15/56) = 6/7 in lowest terms.
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Can someone help me with 12. and 13.
What are rational and irrational numbers?
Answer:
Rational numbers are numbers that can be expressed as a fraction or part of a whole number. (examples: -7, 2/3, 3.75) Irrational numbers are numbers that cannot be expressed as a fraction or ratio of two integers. There is no finite way to express them. ( examples: √2, π, e)
Thanks guys for the help
Answer:
4=128
5=512
6=2048
Step-by-step explanation:
I am not sure if this is correct, because I never answered a question like this before. If I am correct can I plz have Brainliest? Thanks!
Have a great day!
What is the equation for the lines that passes through the coordinates (0,0) and (3.5,3.5)
The equation of the line which passes through the coordinates (0,0) and (3.5,3.5) is y = x.
The slope intercept form of a line is given by:-
y = mx + c
Where,
m represents the slope of the line
c represents the y -intercept
(x,y) represents the coordinates of each point on the line.
We also know the slope of the line will be:-
(3.5-0)/(3.5-0) = 3.5/3.5 = 1
Hence, m = 1
Putting (0,0) in y = mx + c, we get,
0 = m*0 + c
0 = 0 + c
c = 0
Hence, the equation of the line is given by:-
y = x
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they are 8,756 students that attend middle schools in the city of Johnson. Of the students, 3,252 are picked up by car, 2,549 ride the bus home, and 2,955 students walk home. How many students leave school by bus or car?
The number of students that leave by bus or car is given as follows:
5801 students.
How to obtain the union and intersection set of the two sets?The union and intersection sets of multiple sets are defined as follows:
The union set is composed by the elements that belong to at least one of the sets.The intersection set is composed by the elements that belong to at all the sets.The or operation is equivalent to the union operation, meaning that we add the number of students that leave by bus to the number of students that leave by car.
Hence the number of students that leave by bus or car is given as follows:
3232 + 2549 = 5801 students.
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I need the know the answer in A B C because I’m confused
Answer:
Step-by-step explanation:
a) edj
b) ed
c) i think ag
read sddddddddd
dxfcgvhbjnkml,
Answer:
1/5
Step-by-step explanation:
rise = 2 ft
run = 10 ft
slope = rise/run = 2/10 = 1/5
Answer: 1/5
Answer:
1/5
Step-by-step explanation:
The slope is the rise over the run
Y / x
2/10
1/5
what is the ans
1. Add : 12a²b², -7a²b² , and 9a²b²
2. Subtract : -5y² from y²
need a well explained ans :)
no spams , unwanted ans and plagiarism
kindly stay out if u don't know the ans
1. 12a²b² + -7a²b² + 9a²b²
= 14a²b² (the terms a²b² are like terms so don't look at them, just add 12 + (-7) + 9.
= 14 (ab)² (you can write like this too because both a & b are squared).
2. y² - (-5y²)
= 6y² (subtract -5 from 1, y² is the like term).
Can someone help md with my slope maze
The following are an example of what type of angles? * 120° 60° O/ Vertical Angles Linear Pair/Complimentary Angles /Supplementary Angles
we know that
Supplementary angles sum 180 degrees
so in this problem
120 and 60and 60
can you make two triangles that are not congruent that have three pairs of congruent angles?
if two triangles have three pairs of congruent angles, then they must be congruent to each other by the Angle-Angle-Angle (AAA) congruence theorem, and thus cannot be non-congruent.
No, it is not possible to make two triangles that are not congruent and have three pairs of congruent angles. This is because if two angles of a triangle are congruent, then the third angle must also be congruent by the Angle Sum Theorem, which states that the sum of the angles in a triangle is always 180 degrees. If two triangles have three pairs of congruent angles, then all three angles in each triangle are congruent, meaning they have the same measure. However, this does not guarantee that the sides of the triangles are congruent. In order for two triangles to be congruent, they must have the same angle measures as well as the same side lengths. Therefore, if two triangles have three pairs of congruent angles, then they must be congruent to each other by the Angle-Angle-Angle (AAA) congruence theorem, and thus cannot be non-congruent.
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A 20-ounce
box of cereal
costs $3.60.
Answer:
is this the full question?
Step-by-step explanation:
Find the value of r, 3/r=12/22
The value of r when 3/r = 12/22 is 5.5 or 11/2.
According to the question,
We have the following information:
3/r = 12/22
Now, we can easily find the value of r using the cross multiplication method:
12r = 22*3
Now, 12 is in the multiplication on the left hand side. So, it will be in the division on the right hand side:
r = 66/12
Now, we will convert this fraction into the simplest form by dividing both the denominator and numerator by 6:
r = 11/2
r = 5.5
Hence, the value of r is 11/2 or 5.5.
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The sum of 4 consecutive integers is 170. What is the largest number in the group?
The largest number when the sum of 4 consecutive integers is 170 will be 44.
According to the question,
We have the following information:
Sum of four consecutive integers = 170
Now, let's take the first integer to be x.
So, the next 3 integers will be (x+1), (x+2) and (x+3) respectively.
Now, the largest number will be (x+3).
Adding 4 consecutive integers:
x+ (x+1) + (x+2) + (x+3) = 170
4x+6 = 170
4x = 170-6 (Moving 6 from the left hand side to the right hand will result in the change of the sign from plus to minus.)
4x = 164
x = 164/4
x = 41
So, the next three consecutive integers will be 42, 43 and 44.
Hence, the largest of the four consecutive integers is 44.
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Which of the following is the correct sequence of project phases? O A. Concept - Planning - Definition O B. Definition - Planning - Performance O C. Postcompletion - Performance - Planning OD. Performance - Concept - Planning
The correct sequence of project phases is Definition - Planning - Performance. The correct answer is B.
This is the typical order of project phases in a traditional project management approach. It starts with the definition phase, where the project's goals, the scope, and the requirements are established.
Then comes the planning phase, where the project plan is developed, including the allocation of resources, scheduling, and budgeting.
Finally, the performance phase begins, during which the project activities are executed, monitored, and controlled to ensure the successful project completion.
Therefore the sequence of project phase is Definition - Planning - Performance The correct answer is B.
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write the formula that shows the dependence of the surface area s of a cube on the lenfth of a an edge
The surface area S of a cube is directly proportional to the square of the length of one of its edges (S = 6a^2).
A cube has six equal square faces, so to find the surface area of a cube, we need to find the area of one of its faces and then multiply it by six. The area of a square is given by the formula A = s^2, where s is the length of one of its sides. Therefore, the area of one face of a cube is A = a^2, where a is the length of one of its edges.
To find the surface area S of the cube, we can simply multiply the area of one face by six: S = 6a^2. This formula shows that the surface area of a cube is directly proportional to the square of the length of one of its edges. If the length of the edge is doubled, for example, the surface area will be quadrupled (2^2 x 6a^2 = 4 x 6a^2)
Therefore, The surface area S of a cube is directly proportional to the square of the length of one of its edges (S = 6a^2).
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HELP ASAP
The table shows input and output values of a function given a rule. Which function
represents the rule?
Input: x, a number; Output: y, 3 less than 2 times x
Input, x: -2 -1 0 1 2
Output, y: -7 -5 -3 -1 1
y=2x+3
y=2x-3
y=-3x+2
y=2x
Answer:I think its A.
Step-by-step explanation:
I'm too lazy too explain you got your answer please be happy
Simplify the ratio 25:35
Answer:
5:7
Step-by-step explanation:
Step-by-step explanation:
5:7 is the simplified fraction of 25:35
Don’t have to do that graphing just need the slope please
The slope and y-intercept of each line are:
13. slope = 1/2; y-intercept: 0.
14. slope = 3; y-intercept: 0.
15. slope = -2/5; y-intercept = 0.
16. slope = -1; y-intercept = 1.
17. slope = -2/3; y-intercept = -4.
18. slope = 1; y-intercept = 0.
19. 7/9
20. 3/5
How to Determine the Slope and the Y-intercept of a Line?The slope and y-intercept of a line can be determine from the given equation of a line in slope-intercept form, y = mx + b, where:
Y-intercept is represented as b.Slope is represented as m.13. y = 1/2x,
The slope = 1/2
The y-intercept of the equation is: 0.
14. y = 3x,
The slope = 3
The y-intercept of the equation is: 0.
15. y = -2/5x,
The slope = -2/5
The y-intercept of the equation is: 0.
16. y = -x + 1
The slope = -1
The y-intercept of the equation is: 1.
17. y = -2/3x - 4,
The slope = -2/3
The y-intercept of the equation is: -4.
18. y = x,
The slope = 1
The y-intercept of the equation is: 0.
19. Slope = change in y / change in x = (18 - 11)/(19 - 10)
Slope = 7/9
20. Slope = change in y / change in x = (2 -(-1))/(9 - 4)
Slope = 3/5
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for a 95% confidence interval, you want to create a population proportion with a margin of error of no more than 0.025. how large of a sample would you need?
You would need a sample size of 384 in order to create a population proportion with a margin of error of no more than 0.025 and a 95% confidence interval.
In order to calculate the sample size needed for a 95% confidence interval with a margin of error of no more than 0.025, the formula to use is the following:
\(n = (z-score)^2 * p * (1-p) / (margin of error)^2\)
Where n = sample size, z-score = 1.96 (for 95% confidence interval), p = 0.5 (the expected population proportion) and margin of error = 0.025.
Substituting these values into the equation, we get:
\(n = (1.96)^2 * 0.5 * (1 - 0.5) / (0.025)^2\\n = 384\)
Therefore, you would need a sample size of 384 in order to create a population proportion with a margin of error of no more than 0.025 and a 95 % confidence interval.
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Can you answer this math homework? Please!
Answer:
The system has one solution,
Both lines have the same y-intercept,
The solution is the intersection of the 2 lines.
Step-by-step explanation:
question 3 consider a certain type of nucleus that has a decay rate constant of 0.0250 min-1. calculate the time required for the sample to decay to one-fourth of its initial value.
Answer:
since the decay rate constant of0.0 250 min.
hence the time required for the sample to decay to one forth of it's initial value is
Step-by-step explanation:
Answer:
Step-by-step explanation: