4. In the diagram below, ABC is shown with AC extended through point D. If mzBCD = 6x + 2,
m/BAC = 3x + 15, and mLABC = 2x - 1, what is the value of x?
Answer:
x = 12----------------------------------------------
According to the diagram, angle BCD is exterior angle and angles BAC & ABC are remote interior angles of the triangle ABC.
As we know, the exterior angle is the sum of remote interior angles.
Set this as equation and solve for xm∠BCD = m∠BAC + m∠ABC 6x + 2 = 3x + 15 + 2x - 16x + 2 = 5x + 146x - 5x = 14 - 2x = 12Answer:
x = 12
Step-by-step explanation:
Exterior Angle Theorem
The interior angles of a triangle sum to 180°. Angles on a straight line sum to 180°. Therefore, the exterior angle of a triangle is equal to the sum of the two non-adjacent interior angles of the triangle.
Given angles:
[tex]\textsf{Exterior angle}: \quad m \angle BCD = 6x+2[/tex][tex]\textsf{Non-adjacent interior angle}: \quad m \angle BAC= 3x+15[/tex][tex]\textsf{Non-adjacent interior angle}: \quad m \angle ABC= 2x-1[/tex]Apply the exterior angle theorem and solve for x:
[tex]\implies m \angle BCD=m \angle BAC+m \angle ABC[/tex]
[tex]\implies 6x+2=3x+15+2x-1[/tex]
[tex]\implies 6x+2=3x+2x+15-1[/tex]
[tex]\implies 6x+2=5x+14[/tex]
[tex]\implies 6x+2-5x=5x+14-5x[/tex]
[tex]\implies x+2=14[/tex]
[tex]\implies x+2-2=14-2[/tex]
[tex]\implies x=12[/tex]
The total amount y (in dollars) in your savings account after buying x video games is represented by y=80-10x. You have $20 in your account after buying video games. How many video games did you buy?
pls help!!
The number of video games bought is 6, when $20 is in your account
How to find the number of video games boughtinformation given in the question
equation of the video games bought is represented by y=80-10x
x = number of video games
y = total amount in savings account
You have $20 in your account after buying video games
The given information is represented as
money left in bank after buying the video game = 80 - 10x
20 = 80 - 10x
10x = 80 - 20
10x = 60
x = 6
Since x is the number of video games then 6 video games was bought
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12. Name the theorem or postulate that can be used to prove that these triangles
are similar.
Answer: SAS Similarity Theorem.
Step-by-step explanation:
Due to the fact the triangles contain a singular angle per each one, whilst using the process of elimination - we are able to configure that the answer is not the AA postulate. This prevalent factor also formulates a conclusion that the answer is unable to be SSS either.
The 28 and 11.2 (Hypotenuse) sides contrive the answer SAS.
SSA is NOT adequate.
what two numbers add to get -13 but multiply to get 15
Answer:
Step-by-step explanation:
7 and 8
Which expression is equivalent to -5(b-2)?
-7b
-2(b - 5)
-5b + 10
10b-5
a student is taking a multiple-choice exam that has 7 test questions and each has 4 options. assume that the student has no knowledge of the subject material but guesses the correct answer with a probability of 0.75. what is the probability that she will answer at most 3 questions correctly?
She has a 0.0755 chance of accurately answering three questions at most.
Given data;
A student is completing a multiple-choice exam that consists of 7 questions and 4 possible answers. Suppose the student guesses the right response with a probability of 0.75 while not knowing the topic.
The terms are expanded using the binomial theorem.
7 questions total.
The probability of doing it right is 0.75.
The chance of getting it wrong is 1 - 0.75 = 0.25
The likelihood that she will accurately respond to no more than three questions is indicated as;
[tex]P = ^nCr p^rq^n^-^r[/tex]
[tex]P = ^nCo (0.75)^r(0.25)^n^-^r[/tex]
Here, r ranges from (0, 1, 2, 3)
[tex]P = ^7Co (0.75)^o(0.25)^7+^7C1 (0.75)^1(0.25)^6+^7C2 (0.75)^2(0.25)^5+^7C3(0.75)^3(0.25)^4[/tex]
[tex]P = (0.25)^7+7(0.75)^1(0.25)^6+21(0.75)^2(0.25)^5+35(0.75)^3(0.25)^4[/tex]
P = 0.0755
Therefore, the probability that she will answer at most 3 questions correctly is 0.0755.
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Find the unit rate. 84 seats in 3 rows = seats per row
Find the unit rate for 2/3
The unit rate of the fraction 2/3 will be 0.67 (approx.).
What is the general equation of a Straight line?
The general equation of a straight line is -
[y] = [m]x + [c]
where -
[m] is slope of line which tells the unit rate of change of [y] with respect to [x].
[c] is the y - intercept i.e. the point where the graph cuts the [y] axis.
The equation of a straight line can be also written as -
Ax + By + C = 0
By = - Ax - C
y = (- A/B)x - (C/A)
We have the following fraction -
2/3
Assume the fraction to be m = 2/3. So, we can write -
2 = 3m
We can write it as -
y = mx ....Eq[1]
for [y] = 2
[x] = 3
We have to find the slope of the straight line represented by equation [1] for x = 3 and y = 2. We can proceed -
2 = 3m
m = 2/3
m = 0.67 (approx.)
Therefore, the unit rate of the fraction 2/3 will be 0.67 (approx.).
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The research team wishes to understand the difference in rates of midwesterners who regularly pay extra for guacamole when offered versus californians. The team will take a random sample of 100 midwesterners and 100 californians to estimate the difference in the rates. What should the researcher do?.
When we want to estimate a population parameter then we use hypothesis test.
What is hypothesis test?
In hypothesis testing, an analyst examines a statistical sample with the aim of demonstrating the plausibility of the null hypothesis.
By measuring and reviewing a representative sample of the population under study, statistical analysts test a hypothesis. All analysts use a random population sample to test the null hypothesis and the alternative hypothesis.
Main body:
As the researchers want to understand the difference between to states they need to do a hypothesis test.
Hence a hypothesis test is done.
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A soda manufacturing plant manufactures 12,000 bottles of soda in an 8 hour shift. The soda produced varies directly with the hours worked.
Which equation can be used to determine the number of bottles produced, b, in terms of the number of hours the manufacturing plant is producing bottles, h?
The Equation used to determine the number of bottles produced in terms of the number of hours the plant is producing bottles is b = 1500h
Number of soda produced in 8 hours = 12000
We know
The number of soda produced varies directly with the hours works
Consider the number of bottle produced = b
Number of hours = h
Then the relationship will be b directly proportional to h
b ∝ h
b = k × h
Where k is the constant
Then substitute the values in the equation and find the value of k
12000 = k × 8
k = 12000/8
k = 1500
The equation will be
b = 1500h
Hence, equation used to determine the number of bottles produced in terms of the number of hours the plant is producing bottles is b = 1500h
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Lines x + 5 = 0 and y = 4x + 4 intersect on a standard (x, y) coordinate plane. What is the y-coordinate of the point where the two lines intersect?.
Lines x + 5 = 0 and y = 4x + 4 intersect on a standard (x, y) coordinate plane.
To find the y-coordinate of the point where the two lines intersect.
given lines are x +5 =0 and y=4x+4
we need to find point of intersection at point of intersection both line will have same point
Let point of intersection be (a,b)
then
a+5 = 0 and b = 4a+4
from 1st equation we have
a = -5
from the 2nd
b = 4a+4
b = 4(-5)+4
b = -20+4
b = -16
Hence y coordinate of point of intersection is -16
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4
-3-2-10
Graph of f
2. The graph of the function f is shown in the figure above. The value of lim ƒ(1-x²) is
x-0
(A) 1
(B) 2
(C) 3
(E) does not exist
can somebody help please
Answer:
The lim for f(1-x^2) is 1
Step-by-step explanation:
Lim f(1 - x^2) as x -> 0
break them apart
Lim (1) - lim (x)^2
where the lim of 1 = 1
for the lim of x^2, sub the value of x = 0, so now:
Lim (1-0) = 1
The graph of the function f is shown in the figure above. The value of lim ƒ(1-x²) is 1. Therefore, the correct option is option A.
What is mathematical function?
In mathematics, a function is a phrase, regulation, or statute that establishes the connection between an independent variable and a dependent variable.
In mathematics, functions exist everywhere, and they are crucial for constructing physical links in the sciences. The German mathematician Peter Dirichlet initially offered the contemporary definition of function in 1837.
Lim f(1 - x²) as x -> 0
Lim (1) - lim (x)²
where the lim of 1 = 1
for the lim of x², substituting the value of x = 0, so now:
Lim (1-0) = 1
Therefore, the correct option is option A.
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Select all the statements that are true of the relation. (2, 4), (6, 3), (5, 4), (7, 3), (8, 2)
A. The domain is (2, 5, 6, 7, 8).
B. The domain is {2, 3, 4).
C. The domain is {2, 3, 4, 5, 6, 7, 8).
D. The range is {2, 5, 6, 7, 8}. E. The range is {2, 3, 4).
Step-by-step explanation:
obviously, your scanning did all kinds of strange things with the brackets.
so, I ignore them and we focus only on the numbers.
the domain is the interval or set of all valid x-values (the first number in an ordered pair).
the range is the interval or set of all valid y-values (the second number in an ordered pair).
so,
A and E are correct.
For the functions f(x) = 3x - 4 and g(x) = x - 41, find the value of ƒ(4) - 2g(3)
⇒ To find f(4) it means that in the place of x in the function f plug in 4 and simplify to find f(4)
[tex]f(4)=3(4)-4\\f(4)=12-4\\f(4)=8[/tex]
⇒Now let us find 2g(3),meaning in the place of x in the function g plug in 3 and simplify to find g(3) after that then multiply the results by 2 as indicated.
[tex]g(3)=(3)-41\\g(3)=-38[/tex]
Meaning 2(g(3))= 2(-38)
⇒2(g(3))=-76
⇒N0ow let us find the value of f(4) - 2g(3)
⇒[tex]f(4) - 2g(3)=8-(-76)\\ f(4) - 2g(3)=8+76\\ f(4) - 2g(3)=84[/tex]
⇒The answer is 84
Ariana is buying a car for $15,812. She pays $5,000 in cash and will repay the rest with 24 equal monthly payments. How much will each payment be?
O $45.50
O $450.50
O $659.20
°. $867.40
If Ariana is buying a car for $15,812and will repay the rest with 24 equal monthly payments. Her payment each month will be: $450.50.
How to find the monthly payment?Using this formula to find the monthly payment
Monthly payment = Cost of car - Amount paid in cash / Number of repayment month
Let plug in the formula
Monthly payment = ($15,812 - $5,000)/24
Monthly payment = $10,812 /24
Monthly payment = $450.50
Therefore the correct option is B.
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Please help! I'll give 100 points!
The scores of the semester exam for one math class are shown below.
81, 66, 79, 76, 55, 66, 86, 83, 64, 49, 71, 76, 46, 75, 60, 68, 75, 86
Using the data, create a box plot on scratch paper in order to complete the following.
Part A: Identify the spread and overall shape of the data.
Part B: Describe at least two ranges where 50% of the exam scores lie, and explain what this means for the students in the math class.
Answer:
All students have to take at least one math class and one language class. Twenty students take calculus, and thirty students take statistics.
what is the unit rate of 1/8 and 1/4
The unit rate of 1/8 is 0.125 and the unit rate of 1/4 is 0.25.
What is the unit rate?
A unit rate is the price for one unit of something. This is written as a ratio with a denominator of one. For instance, if you ran 70 yards in 10 seconds, you averaged 7 yards per second. Both ratios, 70 yards in 10 seconds and 7 yards in 1 second, are rates, but only the latter is a unit rate.
For 1/8,
Divide the numerator and denominator by '8', to make the denominator 1.
[tex]=\frac{\frac{1}{8}}{\frac{8}{8}} \\\\\=\frac{0.125}{1} \\=0.125[/tex]
for 1/4,
Divide the numerator and denominator by '4', to make the denominator 1.
[tex]=\frac{\frac{1}{4}}{\frac{4}{4}} \\\\\\\=\frac{0.25}{1} \\\\=0.25[/tex]
Hence, the unit rate of 1/8 is 0.125 and the unit rate of 1/4 is 0.25.
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ABCD is a quadrilateral.
AB = CD.
Angle DAB = Angle CDA.
Prove that AC = BD.
By using the SAS congruence rule, we can prove that AC = BD
What is SAS congruence Rule?
According to the SAS rule, two triangles are said to be congruent if any two sides and any angle between the sides of one triangle are equal to the corresponding two sides and angle between the sides of the second triangle.
What is CPCT?
When we study the congruent triangle, we come across the term CPCT. Corresponding Parts of Congruent Triangles are abbreviated as CPCT. Congruent triangles have equal corresponding parts, as is well known. We frequently use the abbreviation cpct in short terms rather than the complete form while discussing triangle topics and answering inquiries.
In the given figure, we have:
ABCD is a quadrilateral, where AB=DC and ∠DAB=∠CDA
Construction: Joining the two diagonal AC and BD;
Now,
In △ABD and △BAC;
⇒AB=DC [ Given ]
⇒ ∠DAB=∠CDA [ Given ]
⇒ AB=BA [ Common side ]
∴ △ABD≅△BAC [ SAS Congruence rule ]
So,
AC = BD, by CPCT;
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Need help with an assignment that is due today. Please help, Thanks!
Answer:
[tex] \large\bold{ \underline{ \color{aqua} \clubs{} \color{blue}exponential \: \: \: notation. \color{lime} \clubs}}[/tex]
✏ The result of this problem when solving is:
[tex] \red{\boxed{\boxed{\bold{\color{blue}answer \color{black} \rightarrow \color{red} \boxed{ \bold\color{blue} \frac{ {81x}^{28} }{625} }}}}}[/tex]
⭐Step-by-step explanation:
✏ To solve this problem we will do the following:
• This problem is about "Exponential Notation" and "Laws of exponents".
We happly the following formula:
[tex] \: \: \boxed{\boxed{\color{blue} \bold{ {( \frac{a}{b})}^{n} \color{black}= \color{blue}\frac{ {a}^{n} }{ {b}^{n}} \: \: \: b\color{black}\:\:\ne{ \color{blue}0}}}}[/tex]
• Now we solve:
[tex] \bold{ {( \frac{ {3x}^{7} }{5})}^{4} = \sf{ \frac{ {81x}^{(7)(4)} }{ {5}^{4} }}} \\ \\ \\ \color{red}\boxed{\boxed{\color{blue}\bold{ \color{black}= \color{blue}\frac{ {81x}^{28} }{625} }}}[/tex]
[tex]\bold \color{lime} \spades{\colorbox{aqua}{ \color{blue}john200817 \: from \: brainly.com} \spades}[/tex]
[tex] \color{blue}\boxed{\color{aqua}\boxed{\color{aquamarine}\boxed{\color{turquoise}\boxed {\bold{ \color{yellow}\bigstar{} \color{cyan}\dag{} \color{lime}\clubs{} \: \color{deepskyblue}i \: \: \: \color{lawngreen}h \color{orange}o \color{red}p \color{blue}e \: \: \: \color{springgreen}m \purple{y} \: \: \: \color{deepskyblue}a \color{lawngreen}n \color{orange}s \color{red}w \color{blue}e \color{springgreen}r \: \: \: \purple{w} \color{deepskyblue}i \color{lawngreen}ll \: \: \: \color{orange}s \color{red}e \color{blue}r \color{springgreen}v \purple{e} \: \: \: \color{deepskyblue}y \color{lawngreen}o \color{orange}u \color{red}. \color{lime}\clubs{} \color{cyan}\dag{} \color{yellow} \bigstar}}}}}[/tex]
Please help ASAP .15 points.
Answer:
one solution
Step-by-step explanation:
5 + ×/3/3+6×/9 multiple each term by 9
45 + 3x=3×+54+×
x=.9
Convert the equation from standard format to slop intercept x-3=-15
the weekly incomes of shift foremen in the glass industry follow the normal probability distribution with a mean of $1,000 and a standard deviation of $100. what is the z value for the income, for a foreman who earns $900 per week?
In both Cases Value of Z is 1. as per given details in the question.
What are z values ?A Z-score is a numeric measure of the relationship of a value to the mean of a group of values. Z-scores are measured in standard deviations from the mean. A z-score of 0 indicates that the data point's value is equal to the mean.
CalculationZ Value is calculated by formula:
Expected salary = Average salary ± (Z × Standard deviation)
a. Z value is calculated below:
Expected salary = Average salary ± (Z × Standard deviation)
$1,100 = $1,000 + (Z × $100)
Z = $100 / $100
Z = 1
Again
Expected salary = Average salary ± (Z × Standard deviation)
$900 = $1,000 - (Z × $100)
Z = $100 / $100
Z = 1
In both Cases Value of Z is 1.
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5. The second of three numbers is 3 times the first. The third is 5 more than
the second. If the second is decreased by twice the third, the result is 5.
Find the three numbers.
The second of three numbers is 7 less than 3 times the first The third is 12
The three numbers are -5, -15, and -10 .
What is linear equation?Equations of straight lines and equations of degree less than 1 are called "linear equations". The linear equation formula can be written as Y = mx + b. where m is the slope of the line, b is the y-intercept, and x and y are the variables. Slope indicates the direction and slope of the line. This is because (0,y) is the point where the line intersects the y-axis.
Calculationb=3a
c=b+5
b-2c=5
b-2(b+5)=5
b-2b-10=5
-b=15
b=-15
c=-15+5
c=-10
-15=3a
a=-5
The numbers are -5, -15, and -10
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I need help solving this equation please show me your work! I will give a brainly
Answer:
n = 4/21
Step-by-step explanation:
[tex]\frac{7}{3} =\frac{4}{9n}[/tex]
==> cross multiply (multiply top of first fraction by bottom of second fraction and top of second fraction by bottom of first fraction)
7 x 9n = 4 x 3
==> simplify
63n = 12
==> divide both sides by 63
n = 12/63
==> simplify fraction
n = 4/21
I know it's a lot of questions, but I'm broke in real life, and now here too. Barely got any points to ask a question. Thank you for helping
1. M represents slope.
2. (-1-1)/(-2+4) = -2/2 = -1
3. Take any of the two given y's and their corresponding x's.
I'll take (3,12) and (4,13)
Plug into y2-y1/x2-x1
13-12/4-3 = 1/1 or 1 over 1
4. 4-0/1-0 = 4/1
Don't worry about the points; keep growing and learning!
A polynomial has two terms. Check all of the factoring methods that should be considered. Common factordifference of cubessum of cubesdifference of squaresperfect-square trinomialfactoring by grouping.
A polynomial is described as a mathematical expression that contains one or more algebraic in which a constant is multiplied by one or more variables that give rise to a non-negative integral power such as ax² + bx + c.
By considering a polynomial with two terms. Methods and polynomials can be used with these methods.
Common factor: For example, if a polynomial is of form 2x³ - 5x² then this can be factored as2x³ - 5x² = x²(2x - 5)
Difference of the cubes: Such as, if a polynomial is of formx³ - 27 then this be factored as
x³ - 27 = (x - 3)(x² + 3x + 3²).
Sum of cubes: For example, if a polynomial is of form x³ + 27 this can be factored asx³ + 27 = (x + 3)(x² - 3x + 3²).
Difference of squares: For example, if a polynomial is of form x² - 9 this can be factored asx² - 16 = (x + 4)(x - 4)
where perfect-square trinomial and factoring by grouping require more than two terms.
Therefore, the polynomial that has two terms in the factoring methods the Common Factor, the Difference of cubes, the sum of cubes, and the difference of squares can only be considered.
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Let ƒ(x) = 4x² - 13 The quadratic function g(x) is f(x) translated 3 units up. What is the equation for g(x) in simplest form? g(x)
The equation of g(x) after the translation up is g(x) = 4x² - 10
How to determine the equation of the translation?The given parameter represents the function f(x) in the question.
This function is given as
f(x) = 4x² - 13
The translation is given as
3 units up.
i.e. a translation up by 3 units
Mathematically, this can be represented as
(x, y) = (x, y + 3)
So, we have
g(x) = f(x) + 3
Substitute the known values in the above equation, so, we have the following representation
g(x) = 4x² - 13 + 3
Evaluate the like terms
g(x) = 4x² - 10
Hence, the equation of g(x) is g(x) = 4x² - 10
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For the functions f(x) = 3x - 4 and g(x) = x - 41, find the value of ƒ(4) - 2g(3)
For the functions f(x) = 3x - 4 and g(x) = x - 41,
ƒ(4) - 2g(3) = 6How to solve the expressionInformation given in the question
functions f(x) = 3x - 4
functions g(x) = x - 41
ƒ(4) - 2g(3) = ?
the expression ƒ(4) - 2g(3) is solved by substituting x = 4 in f(x)
f(4) = 3 * 4 - 4
f(4) = 12 - 4
f(4) = 8
and x = 3 in g(x)
2g(3) = 2(3 - 4)
2g(3) = 2 *-1
2g(3) = -2
substituting ƒ(4) - 2g(3)
= 8 - 2
= 6
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6q+4-q+5 please answer quickly ik this question may seem easy but I’m not that smart hah
Answer:
5q + 9
Step-by-step explanation:
The Concept in that Question is adding Like-Terms
6q + 4 - q + 5 = ( 6q - q ) + ( 4 + 5 ) = 5q + 9
(-2, 7) and (6, -5)
What is the linear equation?
pls help asap! tysm if u do!
Step-by-step explanation:
m = (y2-y1)/(x2-x1)
m= (-5-7)/(6--2)
m = -12/8
m = -3/2
y-b = m(x-a)
y-7 = -3/2(x--2)
y-7 = -3x/2 - 3
y = -3x/2 + 4 <-- Equation of line