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Joe practiced his trumpet 3/4 hour on Monday and 7/12 hour on Tuesday. How long did he practice altogether?
a. 2 hours
b. 1 1/3 hours
c. 2 2/3 hours
d. 5 1/3 hours
Which point is on the graph of a direct variation equation in which k = 1.8? A. (4, 0.45) B. (7.2, 4) C. (4, 7.2) D. (0.45, 4)
Answer: C
(4, 7.2)
Step-by-step explanation: Just took this test
How many minutes will it take to drive 82 miles with the speed of 65 miles per hou?
Which of the following is true for the relation f(x) = 2x2 + 1?
Only the equation is a function.
Neither the equation nor its inverse is a function.
Both the equation and its inverse are functions.
Only the inverse is a function.
Answer:
Both the equation and its inverse are functions.
Step-by-step explanation:
Since, a relation is called a function when an input value of the relation has only one output value,
Here, the given relation,
[tex]f(x) = 2x^2 + 1[/tex]
When we plot the graph of this function,
We observed that all vertical line intersects the graph exactly once, except
, x = 0,
Thus, by vertical line test,
In the given equation every x has only one output value,
⇒ f(x) is a function,
Now, the inverse of a function is also a function,
⇒ [tex]f^{-1}(x)[/tex] is also a function,
Hence, Both the equation and its inverse are functions.
Jon has two trees in his yard. one is 20 feet taller than the other. if we let h h be the height of the shorter tree, write an algebraic expression for the sum of the two trees' heights. be sure to simplify your expression.
Answer:
[tex]2h+20[/tex]
Step-by-step explanation:
It is given that there are two trees in Jon yard, where one tree is 20 feet taller than the other.
We need to find the algebraic expression for the sum of the two trees' heights.
So, in order to solve that we first need to find the height of individual trees then we have to add.
Also, It is given that the height of the smaller tree is h.
So, height of the larger tree is [tex]h+20[/tex]
Now, the total height of both the trees [tex]=h+h+20[/tex]
[tex]=2h+20[/tex]
Hence, the total height of both the trees is [tex]2h+20[/tex].
What is the probability of flipping heads with a biased coin?
Find the equation of the line passing through (4,3) and parallel to the line whose equation is y=2x-6
A sample in which every member of the sampling frame has an equal chance of being selected.
The sum of two consecutive integers is 131. What are the integers?
Answer:
The Integers are 65&66
Step-by-step explanation:
Because I got correct with these awnsers
What is the justification for each step in the solution of the equation?
−2(x−1)+12=4x−6−2(x−1)+12=4x−6
Select from the drop-down menus to correctly justify each step.
−2(x−1)+12=4x−6−2(x−1)+12=4x−6 Given
−2x+2+12=4x−6−2x+2+12=4x−6
−2x+14=4x−6−2x+14=4x−6 Combine like terms.
−2x=4x−20−2x=4x−20
−6x=−20−6x=−20 Addition or Subtraction Property of Equality
x=206x=206
x=103x=103 Simplify.
Here are the following justifications:
Given: -2 (x-1) +12=4x-6
Distribute property = -2x+2+12=4x-6
Combine like terms= -2x+14=4x-6
Transpose = -2x = 4x – 20
Addition or Subtraction Property of Equality = -6x = -20
Division property of equality = x = 20/6
Simplify = x = 10/3
Answer:
Step-by-step explanation:
A red blinking light blinks every 18 seconds, while a yellow blinking light blinks every 12 seconds. If both lights start at the same time, after how many seconds will they next blink at the same time? A) 6 B) 18 C) 36 D) 54
In order to find the answer, you need to find the LCM, Least Common Multiple. The least common multiple of 18 and 12 is C. 36
Brainliest Please!!!
FM = 5y + 13, MG = 5 - 3y, FG = ? M is the midpoint of FG. Use the given information to find the missing measure or value.
A line is a one-dimensional shape that is straight. The length of the side FG is 16 units.
What is a line?A line is a one-dimensional shape that is straight, has no thickness, and extends in both directions indefinitely.
Given that FM = 5y + 13 and MG = 5 - 3y. Also, midpoint of the line FG is M, therefore, the length of the two segments FM and MG will be equal to each other.
FM = MG
5y + 13 = 5 - 3y
5y + 3y = 5 - 13
8y = -8
y = -8/8
y = -1
Now, the length of the two line segments will be,
FG = FM + MG
= 2y + 13 + 5
= 2y + 18
= 2(-1) + 18
= -2 + 18
= 16
Hence, the length of the side FG is 16 units.
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A person can burn about 9 calories per minute bicycling. Let x represent the number of minutes bicycled, and let y represent the number of calories burned. Create a mapping diagram to show the number of calories burned by bicycling for 50, 100, 150, or 200 minutes. Determine the domain and range of the relation in context and explain whether or not this represents a function.
Final answer:
A mapping diagram to show the number of calories burned by bicycling for different durations has been created. The domain is {50, 100, 150, 200} minutes, and the range is {450, 900, 1350, 1800} calories. This represents a function because each time duration maps to exactly one calorie value.
Explanation:
To create a mapping diagram that represents the number of calories burned by bicycling for 50, 100, 150, or 200 minutes, we consider that a person burns about 9 calories per minute. Let x represent the number of minutes bicycled, and let y represent the number of calories burned. The mapping diagram looks like this:
50 minutes → 50 × 9 = 450 calories
100 minutes → 100 × 9 = 900 calories
150 minutes → 150 × 9 = 1350 calories
200 minutes → 200 × 9 = 1800 calories
The domain of this relation is the set of minutes bicycled, which is {50, 100, 150, 200}, and the range is the set of calories burned, which is {450, 900, 1350, 1800}. This does represent a function because for each value in the domain, there is exactly one corresponding value in the range.
A student is attempting to simplify the expression below. Sample mathematical work is shown. Which statement best applies to the sample mathematical work?
Given xy+yx+x-3(x+y), I first apply the distributive property, which yields the expression xy + yx + x – 3x – 3y. I can then collect like terms: since x – 3x = –2x, I have the expression xy + yx – 2x – 3y as my final answer.
A.
The student failed to properly apply the distributive property.
B.
The student collected two or more terms that were not like terms.
C.
The student failed to collect all like terms.
D.
The mathematical work shown above is correct.
Which of the following points is a solution of the inequality y > -2x + 5?
(1 ,4)
(0 ,5)
(-2, 8)
(1, -2)
After testing each given point by substituting them into the inequality y > -2x + 5, only the point (1, 4) satisfies the condition, making it the correct answer.
The question is asking to find which point among the options given satisfies the inequality y > -2x + 5. To solve this, we will substitute the x and y values from each option into the inequality and check whether the inequality holds.
For (1, 4), if we substitute x = 1 and y = 4 we get 4 > -2(1) + 5, which simplifies to 4 > 3. Since this is true, this point is a solution.
For (0, 5), if we substitute x = 0 and y = 5 we get 5 > -2(0) + 5, which simplifies to 5 > 5. Since this is not true (it should be strictly greater), this point is not a solution.
For (-2, 8), if we substitute x = -2 and y = 8 we get 8 > -2(-2) + 5, which simplifies to 8 > 9. Since this is not true, this point is not a solution.
For (1, -2), if we substitute x = 1 and y = -2 we get -2 > -2(1) + 5, which simplifies to -2 > 3. Since this is not true, this point is not a solution.
Therefore, the correct answer is the point (1, 4) as it is the only one that satisfies the given inequality.
A salesman makes both a base salary and also a commission, which is a percentage of what he sells. Each month, if his sales total s dollars, he makes a total of 2000 + 0.1s dollars. What does 2000 represent?
LaTonya works two part-time jobs while attending college. She works 12 hours per week as a work-study student at the college and is paid once a month. After taxes, her net pay is $289. On her second job, LaTonya works 16 hours each week and is paid $7.25 per hour. Deductions from her weekly paycheck total $22.10. LaTonya's husband works full-time and is paid every two weeks. His take home pay after taxes is $1,108.
What is the total household income they should use in creating a budget for the next six months?
Answer:
Your answer should be $18,579.40
Step-by-step explanation:
Find the value of the following expression [(17-9)×(3×2)]÷2
What is the answer to the word problem a can of mixed nuts has 5 peanuts for every 2 cashews. there are 175 peanuts in the can. how many cashews are there?
A factor for (f/g, i, n) could be obtained by multiplying the (p/g, i, n) factor by the _______________ factor.
Answer:
hm
Step-by-step explanation:
good question
The factor that needs to be multiplied by the (p/g, i, n) factor to obtain the (f/g, i, n) factor is the conversion factor between the two units of measurement being used for the factor.
What is an expression?An expression contains one or more terms with addition, subtraction, multiplication, and division.
We always combine the like terms in an expression when we simplify.
We also keep all the like terms on one side of the expression if we are dealing with two sides of an expression.
Example:
1 + 3x + 4y = 7 is an expression.
3 + 4 is an expression.
2 x 4 + 6 x 7 – 9 is an expression.
33 + 77 – 88 is an expression.
We have,
In this case, the units of measurement for both factors are not specified, so it's not possible to determine the specific conversion factor needed. However, in general, if the two factors are expressing the same quantity but in different units (for example, feet and meters), then the conversion factor between those two units would be used to convert the (p/g, i, n) factor to the appropriate units before multiplying it by the (f/g, i, n) factor.
Thus,
The factor that needs to be multiplied by the (p/g, i, n) factor to obtain the (f/g, i, n) factor is the conversion factor between the two units of measurement being used for the factor.
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which of the following equations describe the graph shown below?
Kevin has $4.85 in nickels and dimes. If he has 34 fewer dimes than nickels, how many coins (nickels and dimes) does he have altogether?
A.) 74 coins
B.) 75 coins
C.) 76 coins
D.) 77 coins
Answer:the awnser is c 76
Step-by-step explanation:
What conversion factor would you use to convert cubic decimeters to milliliters?
find the derivative of the given function at the indicated point f(x)=1/x a=2
Final answer:
The derivative of the function f(x) = 1/x at x = 2 is -1/4, found using the power rule of differentiation.
Explanation:
To find the derivative of the function f(x) = 1/x at the point where a = 2, we employ the power rule of differentiation. The function can be rewritten as f(x) = x-1. Applying the power rule (f'(x) = n*xn-1) to this function, the derivative is f'(x) = -1*x-2 or f'(x) = -1/x2. To find the derivative at x = 2, we simply substitute x with 2, giving us f'(2) = -1/22 = -1/4.
Evaluate this piecewise function at x=-4 and x=4.
(Can someone show me how to solve this because i don't know what to do to solve this)
A zebra ran at a speed of 20 feet per second. Which operation should you use to find the distance the zebra ran in 10 seconds?
you would multiply speed by time
20 feet per second times 10 seconds = 200 feet total
The function f(x) is graphed on the coordinate plane.
What is f(−1) ?
Answer:
3
Step-by-step explanation:
Similar problem to a previous one that I solved
Walter is a comic book artist. He usually draws 36 comic panels each day. How many comic panels can he draw in 2 weeks.
How to simplify equations with fractional exponents?
Final answer:
To simplify equations with fractional exponents, divide the digit term of the numerator by the digit term of the denominator and subtract the exponents of the exponential terms. Then multiply the numerators and denominators together and simplify by common factors if needed.
Explanation:
When simplifying equations with fractional exponents, we can follow these steps:
Divide the digit term of the numerator by the digit term of the denominator.Subtract the exponents of the exponential terms.Multiply the numerators and denominators together and simplify by common factors if needed.For example, let's simplify the equation √(x³ / y²). We divide x³ by y², which gives us x/y. Then we subtract the exponents, resulting in √(x/y). Finally, we can simplify the fractional exponent by taking the square root of x/y, which gives us √(x/y).
eight out of ten dentists prefer crest toothpaste.what is the ratio of dentist who do not prefer crest to those who do.
8 do, 2 don't
so the ratio would be 2:8 which can reduce to 1:4