Answers
The four students; Michal, Hypatia, clodoveo and Jamal's attempt to explain the expression "3 - 5 × (4 - 3 × 2)² - 1 + 2(1 - 2)³" is incorrect
Simplification of expressionThis means to make simpler, either by reducing in complexity, reducing to component parts, or making easier to understand.
3 - 5 × (4 - 3 × 2)² - 1 + 2(1 - 2)³
Using PEMDAS
P = parenthesisE = ExponentM = multiplicationD = divisionA = additionS = SubtractionCorrect workings:
3 - 5 × (4 - 3 × 2)² - 1 + 2(1 - 2)³
3 - 5 × (1 × 2)² - 1 + 2(-1)³
= 3 - 5 × (2)² - 1 + 2(-1)
= 3 - 5 × (4) - 1 - 2
= 3 - 20 - 3
= - 20
Michal made the mistake of writing 2 instead of 20 Hypatia made the mistake of doing 3 - 5 first instead of opening the parenthesis according to PEMDASClodoveo's mistake was finding the cube of -1 to be 1 instead of -1Jamal's mistake was missing the 2 in 2(-1)³In conclusion, the correct simplification of the expression "3 - 5 × (4 - 3 × 2)² - 1 + 2(1 - 2)³" is -20
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Related Questions
question 1 and 2 (10 popints)
Answers
Exponential function:
A mathematical function with the formula f (x) = an x is an exponential function. where an is a constant known as the function's base and x is a variable. The transcendental number e, or roughly 2.71828, is the exponential-function base that is most frequently encountered.
Given,
The exponential function = 14²The value of this exponential function :
14 × 14 = 196
The exponential function = 4⁵The value of this exponential function :
4 × 4 × 4 × 4 × 4 = 1024
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Help with this question asap please help
Answers
The meaning of vertical intercept in this context can be inferred from the options to mean that the helicopter took off from a height of 50 ft.
What is the vertical intercept?In a linear problem or a graph, the vertical intercept, which is also known as the y-intercept, refers to the value of y when the value of x is 0.
Assuming y in this problem refers to the height and x refers to the minutes, the vertical intercept would be the height at 0 minutes.
If the vertical intercept is 50 ft then it means that the helicopter took off from 50 feet because at takeoff, the value of x would be 0 minutes.
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a. write a rule for the congruence mapping that will move a figure 5 units to the right and 3 units up. b. write a rule for congruence mapping that reflects a figure across the y-axis.c. why are these mappings called congruence mappings?
Answers
Given:
Two different congruency mapping
To find:
a) a rule for the congruence mapping that will move a figure 5 units to the right and 3 units up
b) a rule for congruence mapping that reflects a figure across the y-axis
[tex]\begin{gathered} a)\text{ Translation rule to the right:} \\ f(x\text{ -d\rparen: \lparen x, y\rparen }\rightarrow\text{ \lparen x+d, y\rparen} \\ Translation\text{ rule up:} \\ f(x)\text{ + b: \lparen x, y\rparen }\rightarrow\text{ \lparen x, y + b\rparen} \\ \\ 5\text{ units to the right and 3 units up:} \\ (x,\text{ y\rparen }\rightarrow\text{ \lparen x + 5, y + 3\rparen} \end{gathered}[/tex][tex]\begin{gathered} b)\text{ reflection across the y-axis} \\ The\text{ x coordinate will be negated while the x coordinate will remain constant} \\ (x,\text{ y\rparen }\rightarrow\text{ \lparen-x, y\rparen} \end{gathered}[/tex][tex]\begin{gathered} c)\text{ The mappings are called congruence mapping because the shapes and size remain the same } \\ \text{but the }position\text{ changes.} \\ As\text{ a result the corresponding angles and sides will be equal} \end{gathered}[/tex]
6-8 7-12 1-4 0-1 find the value of these cards and put them in order from lowest to highest
Answers
The order from lowest to highest is -5, -3, -2, -1 .
What is ascending order ?
Numbers can be arranged in ascending order, from least value to highest value. The arrangement is left to right. Increasing order is another name for ascending order.
6-8=-2
7-12=-5
1-4=-3
0-1=-1
Order : -5, -3, -2, -1
Avoid becoming confused by the values following the negative sign. The value of a number decreases with increasing size after a negative sign.
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Find an nth-degree polynomial function with real coefficients satisfying the given conditions. If you are using a graphing utility, use it to graph the function and verify the real zeros and the given function value. N=3; 3 and 2i are zeros; f(-1)=20
Answers
An nth- degree polynomial function with real coefficient for N = 3 ; 3, 2i are zeros ; f(-1) =20 is given by f(x) = (-1)( x³ -3x²+4x -12).
As given in the question,
Number of zeros of the polynomial function N = 3
Real and complex zeros = 3, 2i , -2i
Function value f(-1) = 20
f(x) = k (x-3)(x-2i)(x+2i)
⇒f(x) = k(x-3)(x²-4i²)
⇒f(x) =k(x-3)(x²+4)
⇒f(-1) = k(-1-3)((-1)² +4)
⇒ 20 =k(-4)(5)
⇒k =-1
Now , f(x) = (-1)((x-3)(x²+4)
= (-1)(x³ -3x²+4x -12)
Therefore, nth- degree polynomial function with real coefficient for N = 3 ; 3, 2i are zeros ; f(-1) =20 is given by f(x) = (-1)( x³ -3x²+4x -12).
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4. 14% of 81 is what number?
Answers
Answer:
11.34
Step-by-step explanation:
14% of 81 =
14% × 81 =
14/100 × 81 =
(14 ÷ 100) × 81 =
14 × 81 ÷ 100 =
1,134 ÷ 100 =
11.34
if two distinct numbers are selected at random from the first seven prime numbers, what is the probability that their sum is an even number? express your answer as a common fraction.
Answers
The probability that a sum is an even number will be 5/7.
What is probability?The area of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a proposition is true. An event's probability is a number between 0 and 1, where, roughly speaking, 0 denotes the event's impossibility and 1 denotes certainty. The probability is typically defined as the proportion of favorable outcomes to all outcomes in the sample space. The probability of an event P(E) = (Number of favorable outcomes) is how it is stated (Sample space).So, the first 7 prime numbers:
2,3,5,7,11,13,17Then,
Even numbers are always produced when two odd numbers are added together.Odd numbers are always created when Even numbers are added to Odd numbers.In the list of 7, there is only one even number. If that is one of the options, then the outcome will only be odd.As the same number cannot be chosen twice, there is a 6/7 chance that it won't be chosen the first time and a 5/6 chance that it won't be chosen the second time.By multiplying these two probabilities, we can determine the likelihood of an even sum.
5/6 × 6/730/425/7Therefore, the probability that a sum is an even number will be 5/7.
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What is an equation of the line through (0, -3) with slope of 2/5
Answers
Answer:
y = [tex]\frac{2}{5}[/tex] x - 3
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 )
here m = [tex]\frac{2}{5}[/tex] and line crosses the y- axis at (0, - 3 ) ⇒ c = - 3
y = [tex]\frac{2}{5}[/tex] x - 3 ← equation of line
Rapunzel was playing a game in which she gained and lost points.
First, she lost nine points three times. Next, she lost three points. Write
the total change to her score as an integer.
Answers
The total change to Rapunzel's score as an integer is (x - 30), where x is the initial score.
How can linear addition and subtraction be carried out?
In math, addition is the process of adding two or more integers together. Addends are the numbers that are added, while the total refers to the outcome of the operation. It is one of the fundamental mathematical operations we employ on a daily basis.
An arithmetic operation called subtraction simulates the process of deleting items from a collection. The negative symbol, or, denotes subtraction.
Let the initial score of Rapunzel be = x
Given, she first lost nine points thrice and then three points, thus her score is: x - (9*3) - 3 = (x - 30) points.
Thus, the total change to her score is (x-30) points.
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Por favor ayúdenme no sé cómo hacer esto
Answers
1. The value of x in the triangle is B. 22.5°.
2. The value of x in the triangle is B. 22.5°.
3. The value of the limit illustrated is D. 32
How to calculate the value?1. It should be noted that the total angle in a triangle is 180°. The three angles given are illustrated as:
Angle 1 = 3x
Angle 2 = x + 30°
Angle 3 = 180° - 120° = 60°
The value of x will be:.
3x + x + 30 + 60 = 180
4x + 90 = 180
4x = 180° - 90°
4x = 90°
x = 90/4.
x = 22.5°
2. Note that the question was repeated. Therefore, the answer is illustrated above The value of x is 22.5°.
3. x³ + 7x² - 4
when x = 2
x³ + 7x² - 4
= 2³ + 7(2)² - 4
= 8 + 28 - 4
= 32
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if -10,p,q,20 are in A.P, find p and q
Answers
The value of arithmetic progression of p = 0 and q = 10
What is arithmetic progression ?When there are identical differences between every two next words, the series is known as an arithmetic progression (AP). There is a chance to find a formula for the nth term of the AP using this kind of development. The series 2, 6, 10, 14, etc., for instance, is an example of an arithmetic progression (AP) because it follows a pattern in which each number is acquired by adding 4 to the preceding word.
Given that : -10,p,q,20 are in A.P
if this -10,p,q,20 are in A.P then it must follow
2b = a+ c
2p = -10 + q ... (i)
2q= p+20 ....(ii)
Solving both equation we get
Multiplying (1) with 2,
4p - 2q = -20
Now adding both the equations
4p - 2q + 2q - p = 0
3p = 0
p = 0
Then, q = 0 + 10 = 10
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Which relation is a function?
Answers
Answer:
option C
Step-by-step explanation:
due to the vertical line test it only passes through the x point once
Identify the following fraction as a proper fraction or an improper fraction
16
11
Answers
The given number [tex]\frac{16}{11}[/tex] is an improper fraction.
What are improper and proper fractions?Proper fraction = A fraction with a smaller numerator than denominator is said to be a correct fraction. A fraction whose numerator is the same as or bigger than its denominator is said to be inappropriate. Proper fractions include 3/4, 2/11, and 7/19.
Improper fraction = A fraction is called improper if the numerator is greater than the denominator. Examples are 9/2, 8/5, 10/3, etc.
When we divide 16 by 11 we get a quotient of 1 and a remainder of 5.
This fraction after solving can be represented as [tex]11\frac{1}{6}[/tex] which is a mixed fraction.
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The line parallel to y=1/4x+1 that passes through the point (6,-2)
Answers
The equation for the line parallel to y=1/4x+1 that passes through the point (6,-2) is x-4y=14 as the slope for both lines are equal and using slope-point form of equation.
What is equation?The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions. For instance, the equation 3x + 5 = 14 consists of the two expressions 3x + 5 and 14, which are separated by the 'equal' sign.
What is Slope-Point form?The equation of a straight line that passes through a given point and is inclined at a specific angle to the x-axis can be found using the point slope form.
Here,
The slope for the line will be 1/4 and the given points will be (6,-2) so the equation for the line is
y-y1=m(x-x1)
y+2=1/4(x-6)
4y+8=x-6
x-4y=14
Given that both lines have an equal slope and using the slope-point form of equation, the equation for the line parallel to y=1/4x+1 passing through the point (6,-2) is x-4y=14.
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A bookshelf is 31 3/4 inches wide 28 inch wide, binders on the shelf side-by-side how many binders can Maria place on the shelf?
Answers
The number of binder on the bookshelf is one
How to determine the number binders on the shelf?The given parameters are:
Width of the bookshelf = 31 3/4 inches
Width of the binders = 28 inches
From the question, we understand that the binders are stacked side by side
This means that the quotient of the width of the bookshelf and the width of the binder will give the number of binders
So, we have
Number of binders = Width of the bookshelf/Width of the binders
This gives
Number of binders = (31 3/4)/28
Evaluate the quotient
Number of binders = 1.13
Approximate
Number of binders = 1
Hence, there is only one binder on the bookshelf
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If a space rover has a mass of 3900 kg, then what is its weight on Mars?
Answers
Answer:
Weight on Mars: 1,475.32 kg
Step-by-step explanation:
The formula is Weight on Mars= (Weight on Earth/9.81m/s2) * 3.711m/s2.
If a space rover has a mass of 3900 kg on Earth, the mass on Mars when it lands will be 3900kg.
What is Mass?Mass is a dimensionless quantity representing the amount of matter in a particle or object. The standard unit of mass in the International System (SI) is the kilogram.
Given,
The mass of a space rover is 3900 kg.
We need to check what is its mass in Mars.
The mass of space rover in Mars will also be same 3900 kg because the mars is same quantity it wont change according to place or time, it remains constant. Where as weight would be changed.
The mass of the object is always constant, anywhere it is on the Earth or Moon or any other planet.
Hence, If a space rover has a mass of 3900 kg on Earth, the mass on Mars when it lands will be 3900kg.
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the question is the png
Answers
Answer:
this appears to already be in standard form?
Step-by-step explanation:
standard form has x and y on one side of the =
the angles of a triangle are in the ratio 3:5:4 calculate the size of each angle
Answers
The 3 angles in a triangle always add up to be 180.
Call the smallest angle as x
-> The 3 angles are x, 4/3x and 5/3x
-> 4x = 180
-> 45
So, the sizes of the 3 angles are 45, 60 and 75.
Need help! please explain how you got the answer as well please and thank u <3
44 points till b givin
Answers
Answer:
C. between 14.1 and 14.2
Step-by-step explanation:
√100 × 2
√(10 × 10) × 2
10√2 = 14.14
I hope this helps!
Answer:
C. Between 14.1 and 14.2
10√2 ≈ 14.142135624
Step-by-step explanation:
Nico, Aditi, Erick, Raj, and Sandra are solving the equation. Two-fifths (5 + x) = 8 Each student begins to solve the problem as shown. Nico Aditi Erick Two-fifths (5 + x) = 8. (Five-halves) two-fifths (5 + x) = 8 (five-halves) Two-fifths (5 + x) = 8. Five-halves (5) + five-halves x = (five-halves) 8 Two-fifths (5 + x) = 8. Two-fifths (5 + x) minus 5 = 8 minus 5 Raj Sandra Two-fifths (5 + x) = 8. (one-half) two-fifths (5 + x) = 8 (one-half) Two-fifths (5 + x) = 8. two-fifths (5) + two-fifths x = 8 Which students are correct in their approach to solving the problem? Select three options. Group of answer choices
Nico
Aditi
Erick
Raj
Sandra
Answers
By applying the distributive property of multiplication, the students that are correct in their approach to solving the problem are: Nico, Raj and Sandra.
How to solve the given equation?In order to open the bracket and isolate the variable x, we would first of all multiply both sides by 5/2 as follows:
2/5(5 + x) = 8
Multiplying both sides by 5/2, we have:
5/2 × 2/5(5 + x) = 8 × 5/2
5 + x = 40/2
5 + x = 20
Subtracting 5 from both sides, we have:
5 + x - 5 = 20 - 5
x = 15
Method 2.In order to open the bracket and isolate the variable x, we would first of all multiply both sides by 1/2 and then 5 as follows:
2/5(5 + x) = 8
Multiplying both sides by 1/2, we have:
1/2 × 2/5(5 + x) = 8 × 1/2
1/5(5 + x) = 4
Multiplying both sides by 5, we have:
5 × 1/5(5 + x) = 4 × 5
5 + x = 20
Subtracting 5 from both sides, we have:
5 + x - 5 = 20 - 5
x = 15
Method 3.In order to open the bracket and isolate the variable x, we would apply the distributive property of multiplication:
2/5(5 + x) = 8
2/5 × 5 + 2/5 × x = 8
2 + 2x/5 = 8
Subtracting 2 from both sides, we have:
2 - 2 + 2x/5 = 8 - 2
2x/5 = 6
Multiplying both sides by 5/2, we have:
5/2 × 2x/5 = 5/2 × 6
x = 30/2
x = 15.
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A gym employee earns the same amount each month. After working for three months, he earned $4,500. Complete the table to determine how much money he will make over a five-month period. how much will he earn after working 1 month?
Answers
1. The money that the gym employee earns in 1 month is $1500.
2. The money that the gym employee earns in 5 months is $7500.
How to calculate the value?The gym employee earns the same amount each month and after working for three months, he earned $4,500.
In this case, the amount that he earns monthly will be:
= Total amount / Number of months
= $4500 / 3
= $1500
He earns $1500 monthly.
The money that the gym employee earns in 5 months will be:
= 5 × $1500
= $7500.
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several psychology students are unprepared for a surprise true/false test with questions, and all of their answers are guesses. a. find the mean and standard deviation for the number of correct answers for such students. b. would it be unusual for a student to pass by guessing (which requires getting at least correct answers)? why or why not?
Answers
The mean and standard deviation for the number of correct answers for such students is; μ = 6.5 and σ = 1.802776
How to find the mean and standard deviation?Given there is a surprise true/false test with 13 questions.
Thus, the probability of correctly guessing the answer is; p=0.5
Let "X' be the answers correctly guess by a student.
The formula for the binomial probability distribution is;
P(X = x) = nCx * p^(x) * (1 - p)^(n - x)
A) The mean of the binomial distribution is given by the formula;
μ = np
μ = 13 * 0.5
μ = 6.5
The formula for standard deviation is:
σ = √(np(1 - p))
σ = √(13 * 0.5(1 - 0.5))
σ = 1.802776
B) The probability that the student getting at least 11 correctanswers is given by:
P(X ≥ 11) = P(X = 11) + P(X = 12) + P(X = 13)
Using online binomial probability calculator, we have;
P(X ≥ 11) = 0.01123
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Complete question is;
Several psychology students are unprepared for a surprisetrue/false test with 13 questions, and all of their answers are guesses.
a. Find the mean and standard deviation for the number of correct answers for such students.
b. Would it be unusual for a student to pass by guessing (which requires getting at least 11 correct answers)? Why or whynot?
The temperature at 2 AM was -3°F is the temperature decreased 12°F and then increase 7°F what integer represents the new temperature?
Answers
The integer represents the new temperature is (-8) F.
what are integers?An integer is the number zero, a positive natural number or a negative integer with a minus sign. The negative numbers are the additive inverses of the corresponding positive numbers.
Given:
At 2 a.m. temperature = -3F
Then temperature decreased 12°F = -12 F
and then increase 7°F = +7F
Now, the temperature is
= (-3) - 12 + 7
= -3 -5
=-8 F
Hence, the temperature is (-8) F
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URGENT!! ILL GIVE
BRAINLIEST! AND 100 POINTS
Answers
Answer:
d
Step-by-step explanation:
because you're already given the hypotenuse "c" and a side length "a"
so
8^2+ y^2=12^2
NEED HELP ASAP. GETS BRAINIEST GET A 100 POINTS
Is the Fibonacci sequence arithmetic, geometric, or neither? Explain how you know.
Look at quotients . What do you notice about this sequence of numbers?
The 15th through 19th Fibonacci numbers are 610, 987, 1597, 2584, 4181. What do you notice about the quotients ?
Answers
Answer:
there are different kind of sequence number and just multiply the fractions.
Step-by-step explanation:
multiply fractions aND you will get the answer.
Creating equivalent ratios
12:___=16:24
Answers
The equivalent ratio is 12: 18
The ratio is 12:_ = 16: 24
12/x = 16/ 24
x≠0, because the denominator can never be 0.
Solve the equation
12/x = 16/24
12/x = 2/3
x = 18
Therefore the equivalent ratio is 12:18.
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5. Find the distance from the point (0, -3) to the line y = x - 1.
Answers
Distance from point (0, -3) to the line y = x - 1 = [tex]\sqrt{2}[/tex]
Given:
Point =(0,-3) => x = 0; y = -3
Line = y = x - 1 => a= 1, b= -1, c=-1
How is the distance from the point to the line calculated?
Let us consider the distance to be d,
[tex]d= \frac{ax+by+c}{\sqrt {a^{2}+b^{2}} } \\\\=\frac{1(0)-1(-3)-1}{\sqrt{2} } \\\\=\frac{2}{\sqrt{2} } = \sqrt{2}[/tex]
What is the distance from a point to a line?
The distance between a point and a line in Euclidean geometry is the shortest path between any two points on an infinite straight line. The length of the line segment connecting the point to the closest point on the line, measured perpendicularly to the line, is the distance between them.If the variances of the dependent and independent variables are equal, then Deming regression, a form of linear curve fitting, produces orthogonal regression, in which each data point's degree of fit error is expressed as the angle of the point from the regression line.To learn more about distance from a point to a line, refer:
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600 people went to the basketball game on Friday and 14% of them bought popcorn. How many people bought popcorn at the basketball game?
Answers
Answer:
84 people
Step-by-step explanation:
14 percent means that for each 100, there are 14 of something.
This is the most common method to calculate 14% of 600. 600 is the Whole, 14 is the Percent, and the Part is what we are calculating. Below is the math and answer to "What is 14% of 600?" using the percent formula.
Percent Formula:
(Whole × Percent)/100 = Part
(600 × 14)/100 = 84
14% of 600 = 84
Simplify. (a²b) ³.(b²c²)
Answers
Answer:
(a²b)³(b²c²)=a⁶b⁵c²
please help me FASTTT
Answers
Answer:
k=40
Step-by-step explanation:
Answer : Each week the amount goes up by $40