Answer:
a = [tex]\frac{w + 4 - 3b}{6}[/tex]
Step-by-step explanation:
Given
w = 3(2a + b) - 4 ( add 4 to both sides )
w + 4 = 3(2a + b) ← distribute parenthesis
w + 4 = 6a + 3b ( subtract 3b from both sides )
w + 4 - 3b = 6a ( divide both sides by 6 )
[tex]\frac{w+4-3b}{6}[/tex] = a
Can the sides of a triangle have lengths 3, 3, and 10?
Answer:
No
Step-by-step explanation:
According to the property of the triangle ,
sum of any two sides should we greater then third side of the triangle.
Here, Measurement of three sides are given as 3,3,5 .
So, sum of the measurement of first two sides is 6.
And third side equals 10.
Clearly 6 is less than 10. So . it violates the property sum of any two sides should we greater then third side of the triangle.
Thus , Sides of a triangle can't be 3,3,10.
Answer:
Yes
Step-by-step explanation:
As long as there are three sides and it forms a triangle, the answer is yes.
Circle A has been dissected into 16 congruent sectors. The base of one sector is 1.56 units, and it's height is 3.92 units. what is the approximate area of circle A?
Answer:
48.92
Step-by-step explanation:
A= (1/2)(b)(h)
A=(1/2)(1.56)(3.92)=3.0576
A=(3.0567)(16)=48.9216
A=48.92
The approximate area of Circle A can be found by understanding that the base of a sector is part of the circumference, and using the radius (height) value of 3.92 units in the area formula A = πr². Accounting for significant figures, the area of Circle A is approximately 48 units².
Explanation:To find the approximate area of Circle A, we need to understand that the base of a sector, which is a part of the circumference of the circle, is close to the length of the arc for a small sector. By dissecting the circle into 16 congruent sectors, each sector represents 1/16 of the circle's full circumference. Since the base of one sector is given as 1.56 units, if we multiply this by 16, we would have the total circumference of the circle. However, the value provided for the 'height' is indeed the radius of the whole circle, which is 3.92 units. The area of a circle is calculated using the formula A = πr².
Using the radius (3.92 units), we can calculate the area:
A = π * (3.92 units)²
A = 3.1415927 * 15.3664 units²
A = 48.2544695988 units²
Considering the significant figures provided in the question, we should limit the calculated area of the circle to two significant figures, matching the least number of significant figures we were originally given, which were in the radius measurement. Therefore, the approximate area of Circle A is:
A = 48 units²
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Can someone help me solve #4! Please and thank you! :)
Answer:
X=16
Step-by-step explanation:
Line QT is congruent with line RS, while line RQ is also congruent with line TS. All in all, each line is congruent to the other. Meaning all sides equal the same amount. We know that angle measure must equal 180, so you must take 3x+5+9x-17=180. Then you will get the variable X to equal 16.
Here are two students' answers for each question. Do you agree with either of them? Explain or show your reasoning.
How many feet are traveled by a person riding once around the merry-go-round?
⚫ Clare says, "The radius of the merry-go-round is about 4 feet, so the distance around the edge is about 8π feet."
⚫ Andre says, "The diameter of the merry-go-round is about 4 feet, so the distance around the edge is about 4π feet."
Answer:
they are both correct
Step-by-step explanation:
If the radius is 4 feet like Clare says, the circumference would be 2(radius)(pi) which is 8pi.
If the diameter were 4 feet, circumference would be (diameter)(pi), which is 4pi.
Factor The Polynomial X2+X-6
Answer:
C) (x-2)(x+3)
Step-by-step explanation:
x^2+x-6=(x-2)(x+3)
Because (x-2)(x+3)=x^2-2x+3x-6=x^2+x-6.
Final answer:
The polynomial x² + x - 6 factors to (x + 3)(x - 2) by finding two numbers that multiply to -6 and add to 1.
Explanation:
To factor the polynomial x² + x - 6, one needs to find two numbers that multiply to -6 (the constant term) and add up to 1 (the coefficient of the middle term, x). These numbers are 3 and -2, because 3 × (-2) = -6, and 3 + (-2) = 1. Therefore, the factored form of the polynomial is (x + 3)(x - 2).
After 56 cans of soup were sold, a clerk moved the remaining cans to a display
case. The display case had shelves that could each hold 9 cans. How many
shelves were needed to fit all the remaining cans?
Answer:
(x - 56) / 9
Step-by-step
We represent the original number of cans of soup by the variable x. After 56 cans of soup were sold, the remaining number of cans of soup is x - 56. Since we have shelves that can hold 9 cans, the number of shelves needed to fit all the remaining cans is
Solve the given system of equations by substitution
x - y = 2, 2x + y = 7
Answer:
x=10/3, y=4/3. (10/3, 4/3).
Step-by-step explanation:
x-y=2
2x+y=7
-----------
x=y+2
2(y+2)+y=7
2y+4+y=8
3y+4=8
3y=8-4
3y=4
y=4/3
x-4/3=2
x=2+4/3
x=6/3+4/3=10/3
x=10/3, y=4/3.
In a school with 400 students, 120 ride the bus to school. What percent of the students ride the bus to school?
Answer:
30%
Step-by-step explanation:
120/400= 0.3
0.3x100=30
Suppose a ball is thrown directly upward from a height of 7 feet with an initial velocity of 50 feet per second. Use the quadratic formula or a graphing calculator to find the number of seconds it takes the ball to hit the ground. Round the nearest tenth of a second.
Answer:
t = 3.3 seconds
Step-by-step explanation:
From the formula of vertical motion of an object under gravity we can write the equation
[tex]H = ut + \frac{1}{2} gt^{2}[/tex] ....... (1)
Where u is the initial velocity (in feet per second) of throw of the object and t is time of travel in seconds and the value of g i.e. gravitational acceleration is 32 feet/sec².
Now, while a ball is thrown vertically upward with velocity 50 ft/sec from a height of 7 ft then the time of travel of the ball before reaching the ground, the equation (1) will be written as
[tex]- 7 = 50t - \frac{1}{2} \times 32 \times t^{2}[/tex]
As we have selected the upward direction as positive so, gravitational acceleration,g will be negative and as the displacement is downward by 7 feet, so it will be negative.
⇒ 16t² - 50t - 7 = 0 ........ (2)
Now, applying Sridhar Acharya formula,
[tex]t = \frac{-(-50) + \sqrt{(-50)^{2} - 4(16)(-7)}}{2(16)}[/tex] {Neglecting the negative root as t can not be negative}
⇒ t = 3.3 seconds {Rounded to the nearest tenth}
(Answer)
A rectangle has a length of 28 meters less than 7 times its width. If the area of the rectangle is 9555 square meters, find the length of the rectangle.
Answer:
7 meters
Step-by-step explanation:
Assume that the length is l and the width is w. Therefore, l is equal to 7 times its width (7*w) minus 28, or l=7*w-28. As we know that w*l = area = 9555, we can plug our value for l in to limit our equation to 1 variable, resulting in w*(7*w-28) = 9555. Adding 28 to both sides to separate the 7w (because we want to solve for that), we get 9583=7w. Then, to solve for the width, we can divide both sides by 7 to get that 9583/7=1369=w. Plugging that back into the formula that w*l=area, we get that 1369*l=9583 -- dividing 1369 from both sides to separate l, we get that l=7.
To find the length of a rectangle where the area is 9555 square meters and the length is 28 meters less than 7 times its width, express the length in terms of the width, use the area to form a quadratic equation, solve for the width, and substitute it back to find the length.
Explanation:To find the length of the rectangle when the area is 9555 square meters and the length is 28 meters less than 7 times its width, let's denote the width of the rectangle as w and the length as l. According to the problem, the length l can be expressed as l = 7w - 28. The area of a rectangle is the product of its length and width, which gives us the equation w × (7w - 28) = 9555.
To find the value of w, we need to solve the quadratic equation 7w2 - 28w - 9555 = 0. Factoring or using the quadratic formula leads to the width, and substituting this back into l = 7w - 28 gives us the length of the rectangle. In solving, ensure to discard the negative value of w as a width cannot be negative.
Once we calculate the width w, the length is found by multiplying it by 7 and then subtracting 28. This process will provide the final length of the rectangle.
A school is repainting some of its classrooms. Each classroom is repainted with 5.5 gallons of paint. Write and solve an equation to determine the gallons of paint the school must purchase if they repaint 18 classrooms.
Idk how to write the equation
Answer:
a
Step-by-step explanation:
because i dont know
Answer: 99 gallons
Equation: 5.5 x 18 = 99
A rectangle has the width of r+3 and a length of 2r+9. What is the perimeter of the rectangle
Answer:
6r+24
Step-by-step explanation:
2(r+3)=2r+6
2(2r+9)=4r+18
(2r+6)+(4r+18)=6r+24
The table shows how the number of cars, c, depends on the number people, t. How would you write this as an equation?
C T
2 1
3 4
4 7
5 10
t=3c-5 t=3c+5
t=5c+3 t=5c-3
Answer:
t = 3c - 5
Step-by-step explanation:
The relation between c and t is linear as the increase of the value of t is uniform for each unit increase in the value of c.
Now, any two points on the graph of the t = f(c) equation are sufficient to determine the equation.
Let the points are (2,1) and (3,4).
So, using two points formula of straight line we get the equation is
[tex]\frac{t - 4}{4 - 1} = \frac{c - 3}{3 - 2}[/tex]
⇒ t - 4 = 3(c - 3)
⇒ t - 4 = 3c - 9
⇒ t = 3c - 5 (Answer)
Bonus: In Triangle STP, the measure of <T is twice the measure of <S and the
measure of <P is three times the measure of <S. What is the measure of all three angles?
ENTER ONLY NUMBERS IN THE BOXES:
m<S = degrees
m<T= degrees
m<P= degrees
Answer:
m∠S=30°
m∠T=60°
m∠P=90°
Step-by-step explanation:
we know that
The sum of the interior angles in a triangle must be equal to 180 degrees
so
In the triangle STP
m∠S+m∠T+m∠P=180° ----> equation A
m∠T=2(m∠S) ----> equation B
m∠P=3(m∠S) ----> equation C
Solve the system of equations by substitution
Substitute equation B and equation C in equation A
m∠S+2(m∠S)+3(m∠S)=180°
Solve for m∠S
6m∠S=180°
m∠S=30°
Find m∠T
m∠T=2(m∠S)
m∠T=2(30°)=60°
Find m∠P
m∠P=3(m∠S)
m∠P=3(30°)=90°
A company has 200 machines. Each machine has 12% probability of not working.
If you were to pick 40 machines randomly, the probability that 5 would not be working is ____ , the probability that all would be working is____, and the probability that at least one machine would be working is______
Using probability and binomial distribution, we determined that the probability of exactly 5 out of 40 machines not working is approximately 0.18. The probability that all machines are working is around 0.024, and the probability that at least one machine is working is almost certain, approximately 1.
To address this problem, we will use the concepts of probability and the binomial distribution.
Calculating the Probabilities:
Let’s denote the probability of a single machine not working as p = 0.12. The probability of a single machine working is q = 1 - p = 0.88.
1. Probability that exactly 5 out of 40 machines are not working
We can use the binomial distribution formula:
P(X = 5) = C(40, 5) * p^5 * q^(40-5)
Where C(40, 5) is the number of combinations of 40 machines taken 5 at a time.
C(40, 5) = 40! / [5!(40-5)!] = 658,008
Therefore:
P(X = 5) = 658,008 * (0.12)^5 * (0.88)^35 ≈ 0.18 (using a calculator for binomial probability)
2. Probability that all 40 machines are working
This can be found by raising the probability of one machine working to the power of 40:
P(all working) = q^40 = 0.88^40 ≈ 0.024
3. Probability that at least one machine is working
The easiest way to calculate this is to find the complement of the probability that none are working and subtract it from 1:
P(none working) = p^40 = (0.12)^40 ≈ 9.0949 x 10^-38 (which is extremely close to 0)
P(at least one working) = 1 - P(none working) ≈ 1 - 0 = 1
Final answer: A company has 200 machines. Each machine has 12% probability of not working. If you were to pick 40 machines randomly, the probability that 5 would not be working is _0.18_ , the probability that all would be working is_0.024_, and the probability that at least one machine would be working is_1_.
Complete question:
A company has 200 machines. Each machine has 12% probability of not working. If you were to pick 40 machines randomly, the probability that 5 would not be working is ____ , the probability that all would be working is____, and the probability that at least one machine would be working is______
If you were to pick 40 machines randomly, the probability that 5 would not be working is 0.186 , the probability that all would be working is 0.011, and the probability that at least one machine would be working is 0.989.
This problem involves probability calculations for a company that has 200 machines, each with a 12% chance of not working. Let's break down the calculations step-by-step:
1. Probability that 5 out of 40 machines are not working:
This can be modeled using the binomial distribution. The binomial formula is:
[tex]P(X = k) = C(n, k) \times p^k \times (1-p)^{(n-k)[/tex]
where:
n = number of trials (40 machines)k = number of successes (5 machines not working)p = probability of success (0.12)C(n, k) = binomial coefficient (number of ways to choose k successes in n trials)For our problem, it becomes:
P(X = 5) = C(40, 5) × (0.12)⁵ × (0.88)³⁵
= 0.186
2. Probability that all 40 machines are working:
This is calculated using the complement probability as follows:
P(All working) = (0.88)⁴⁰
≈ 0.011
3. Probability that at least one machine is working:
This can be calculated using the complement rule:
P(At least one working) = 1 - P(None working)
= 1 - (0.88)⁴⁰
≈ 0.989
Arlene has 1/3 as many goldfish as Isabelle. Isabelle has 5 times as many goldfish as Anaele. If Anaele has 18 goldfish, how many goldfish does Arlene have?
Answer:
30
Step-by-step explanation:
to find how many Isabelle has, we multiply Anaele's number by 5. 18(5)=90. Isabelle has 90. Arlene has one third (1/3) of the number of Isabelle. So, we divide 90 by 3. 90/3=30. Arlene has 30 goldfish
ok, i need to determine if it can be written as a fraction. Then state the reason.
Answer:
a) YES. Repeating decimal
b) YES. Repeating decimal
c) NO. Decimal neither terminates nor repeats
d) YES. Terminating decimal
Step-by-step explanation:
Any rational number can be written as a fraction, that is, a division of integers.
a) The number [tex]\overline{0.54}[/tex] has a repetitive period of 54. It can be expressed as a fraction because its decimal are repeating forever
b) The number 0.16666... (expressed as a repeating 6) can also be converted to a fraction because it's a repeating decimal
c) The number 0.5473... cannot be expressed as a fraction because the ellipsis (...) means the decimals continue with no limit and no pattern can be found (no repetitive decimal)
d) The number 0.378 can be easily expressed as a fraction because it has a finite number of decimals (no ellipsis) or a terminating decimal
Solve for b 2/3+5=20-b
Answer:
b=43/3
Step-by-step explanation:
2/3+5=20-b
2/3+15/3=20-b
17/3=20-b
b=20-17/3
b=60/3-17/3
b=43/3
4. Tickets for a matinee are $5 for children and $8 for adults. The theater sold a total of 142 tickets for one matince Ticket
sales were $890. How many of each type of ticket did the theater sell?
System of equations:
The theater sold 82 children tickets and 60 adult tickets.
Step-by-step explanation:
No. of tickets sold = 142
Total sales = $890
Cost of one child ticket = $5
Cost of one adult ticket = $8
Let,
x be the number of children tickets
y be the number of adult tickets
According to given statement;
x+y=142 Eqn 1
5x+8y=890 Eqn 2
Multiplying Eqn 1 by 5
[tex]5(x+y=142)\\5x+5y=710\ \ \ Eqn\ 3[/tex]
Subtracting Eqn 3 from Eqn 2
[tex](5x+8y)-(5x+5y)=890-710\\5x+8y-5x-5y=180\\3y=180[/tex]
Dividing both sides by 3
[tex]\frac{3y}{3}=\frac{180}{3}\\y=60[/tex]
Putting =60 in Eqn 1
[tex]x+60=142\\x=142-60\\x=82[/tex]
The theater sold 82 children tickets and 60 adult tickets.
Keywords: linear equations, subtraction
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Which statement about 1.23 ÷ 0.15 is true?
The dividend should become 15.
The divisor is a whole number.
The quotient does not have a hundredths place.
Answer:
C
Step-by-step explanation:
Final answer:
This answer clarifies the true statement about the division of 1.23 by 0.15, highlighting key misconceptions about the dividend, divisor, and quotient.
Explanation:
Which statement about 1.23 ÷ 0.15 is true?
The dividend should become 15. This statement is false as the dividend after the division remains 1.23.
The divisor is a whole number. This statement is false as 0.15 is not a whole number.
The quotient does not have a hundredths place. This statement is true as the quotient after dividing 1.23 by 0.15 is 8.2, which does not have a hundredths place.
Evaluate the expression when m=6 and n=7
The value of the expression is : 61
Using the expression given :
n + 9mUsing the values of n and m given ;
n = 7m = 6Substituting our values into the expression ;
7 + 9(6)
7 + 54
= 61
Hence, the value of the expression is. 61
Complete Question :
Evaluate the expression n + 9m when m=6 and n=7
9 inches of rain in 72 hours as a unit rate
Answer:
Step-by-step explanation:
the unit rate of rainfall is [tex]\( \frac{1}{8} \)[/tex] inches per hour.
To find the unit rate of rainfall, which is the amount of rain per unit of time, we divide the total amount of rain by the total time.
Given:
Total amount of rain: 9 inches
Total time: 72 hours
Step 1: Divide the total amount of rain by the total time:
[tex]\[ \text{Unit rate} = \frac{\text{Total amount of rain}}{\text{Total time}} \][/tex]
[tex]\[ \text{Unit rate} = \frac{9 \text{ inches}}{72 \text{ hours}} \][/tex]
Step 2: Simplify the expression:
To simplify the unit rate, we divide 9 by 72.
[tex]\[ \text{Unit rate} = \frac{9}{72} \text{ inches per hour} \][/tex]
Step 3: Simplify the fraction:
[tex]\[ \text{Unit rate} = \frac{1}{8} \text{ inches per hour} \][/tex]
So, the unit rate of rainfall is [tex]\( \frac{1}{8} \)[/tex] inches per hour.
How many degrees would a kite need to be rotated to carry it onto itself?
Eve split 42 marbles between herself and 5 friends. Her mom then gave her 2 more packs of marbles with 4 in each. How many does she now have?
Answer:
$15
Step-by-step explanation:
Can someone help me and explain to me what to do
Answer:
25.12^2
Step-by-step explanation:
So, you are being asked to find the area of the circle. It says that the area is equal to pi times the radius squared, which would be pie times the diameter, or d.
So the diameter is 8 cm.
It tells you to use 3.14 for pi.
8 x 3.14= 25.12^2
So the area of the circle would be 25.12^2, and you would keep it like that.
Hope this helps!
(BTW, pi is the symbol at the bottom, where is says A= pi R^2)
Answer:
50.24
Step-by-step explanation:
Area of a circle is:
A = πr²
where π is approximately 3.14, and r is the radius of the circle (half the diameter).
The diameter is 8 cm, so the radius is 4 cm. Therefore, the area is:
A = π (4 cm)²
A = 50.24 cm²
Apolline is mowing lawns for a summer job.For every mowing job,she charges an initial fee plus constant fee for each hour of work.Her fee for a 5-hour job, for instance,is $42.Her fee for a 3-hour job is $28
Answer:
A. Therefore, the slope of the above equation is 7 and x-intercept is (-1,0)
B. The slope 7 and y-intercept (0,7)
C. The slope is 7 and (1,14) is the point.
D. Y-intercept = (0,7) and X-intercept = (-1,0).
E. (1,14) is the point and the y-intercept is (0,7).
F. Points (1,14) and (2,21) are the two points.
Step-by-step explanation:
Apolline charges a fixed initial fee and a constant fee for each hour for mowing work.
If we try to model the above conditions with a total cost for mowing as C for working for h hours then we will get
C = a + bh ....... (1)
Where a is the initial fee and b is the rate of charge per hour of work.
Now, her fee for a 5-hour job is $42 and her fee for a 3-hour job is $28.
Hence, from equation (1),
42 = a + 5b ........ (2) and
28 = a + 3b ......... (3)
Now, solving equations (2) and (3) we get 2b = 42 - 28 = 14
⇒ b = 7 dollars per hour of work.
And from equation (3) we get, a = 28 - 3b = 7 dollars.
So, the equation (1) becomes C = 7 + 7h ....... (4)
A. Therefore, the slope of the above equation is 7 and x-intercept is (-1,0)
B. The slope 7 and y-intercept (0,7)
C. The slope is 7 and (1,14) is the point.
D. Y-intercept = (0,7) and X-intercept = (-1,0).
E. (1,14) is the point and the y-intercept is (0,7).
F. Points (1,14) and (2,21) are the two points. (Answer)
Answer:
in short response the answer is F
Step-by-step explanation:
the two points dont intercept
please help solve
25 increased by twice a number. Use the variable n to represent the unknown number.
Answer:
25 + 2n
Step-by-step explanation:
25 increased by twice the number n.
25 increased by 2 x n
25 + 2n
A line has a slope of 8 and includes the points (1, z) and (2,8). What is the value of z?
The value of z is zero
Step-by-step explanation:
The slope is the steepness of the line.
The formula for slope is given by:
[tex]m=\frac{y_2-y_1}{x_2-x_1}\\Here\\(x_1,y_1)\ are\ the\ coordinates\ of\ first\ point\ on\ line\\(x_2,y_2)\ are\ the\ coordinates\ of\ second\ point\ on\ line[/tex]
Here
(x1,y1) = (1,z)
(x2,y2) = (2,8)
So,
[tex]m=\frac{y_2-y_1}{x_2-x_1}\\8 = \frac{8-z}{2-1}\\8=\frac{8-z}{1}\\8-8 = -z\\z = 0[/tex]
The value of z is zero
Keywords: slope, Line
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Use the properties of operations to determine if each pair of expressions is equivalent
1/2(4-2x); 2-2x
Using the properties of operations the given pair of expressions are not equivalent
Solution:
Given that, we have to use the properties of operations to determine if each pair of expressions is equivalent
And the two expressions are:
[tex]\frac{1}{2}(4-2 x) \text { and } 2-2 x[/tex]
Now, we know that, there are four (4) basic properties of operations:
Commutative, Associative, Distributive and Identity. These properties only apply to the operations of addition and multiplication.
So, if we observe we can apply distributive property on 1st expression
The distributive property of multiplication states that when a number is multiplied by the sum of two numbers, the first number can be distributed to both of those numbers and multiplied by each of them separately, then adding the two products together for the same result as multiplying the first number by the sum.
[tex]\begin{array}{l}{\frac{1}{2}(4-2 x) \rightarrow \frac{1}{2}(4)-\frac{1}{2}(2 x)} \\\\ {\rightarrow 2-x}\end{array}[/tex]
Here the resulting expression is 2 – x and it is not equivalent to 2 – 2x
Hence, the given two expressions are not equal.
Answer:
Using the properties of operations the given pair of expressions are not equivalent
Solution:
Given that, we have to use the properties of operations to determine if each pair of expressions is equivalent
And the two expressions are:
Now, we know that, there are four (4) basic properties of operations:
Commutative, Associative, Distributive and Identity. These properties only apply to the operations of addition and multiplication.
So, if we observe we can apply distributive property on 1st expression
The distributive property of multiplication states that when a number is multiplied by the sum of two numbers, the first number can be distributed to both of those numbers and multiplied by each of them separately, then adding the two products together for the same result as multiplying the first number by the sum.
Here the resulting expression is 2 – x and it is not equivalent to 2 – 2x
Hence, the given two expressions are not equal.
Step-by-step explanation:
Which of the following numbers can be expressed as repeating decimals? (5 points) 5 over 7 , 4 over 5 , 7 over 9 , 5 over 8
Answer:
5 over 7 and 7 over 9
Step-by-step explanation:
Answer:
5 over 7 and 7 over 9 is the answer 0w0