Answers
2. 2x^2-9x+10 (B)
3. -1 (D)
4. 40x^2+22x-6 (B)
5.x^2-2x+4-(14/x+2) (A)
Related Questions
To solve a problem, we often _________ the given information into algebraic expressions and equations.
Example: The phrase "4 more than twice a number" becomes '2n + 4'.,
Answers
Answer:
Translate or transform
Step-by-step explanation:
Took the test (USA test prep)
Please HELP.. MEDAL/ FAN
The ages of students in a school are normally distributed with a mean of 15 years and a standard deviation of 2 years. Approximately what percent of the students are between 14 and 18 years old?
24.17%
62.47%
30.85%
93.32%,
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So the solution for this is that P(students between 14 and 18 years) = 0.9332 - 0.3085 = 0.6247.
To get the percentage, just multiply it by 100 and you will get the answer.
The value of y varies directly with x, and y = 12 when x = 16.
Find y when x = 6.
A. 8
B.12
C.2/9
D.9/2
Answers
Final answer:
Given that the value of y varies directly with x, and y = 12 when x = 16, we find that y when x = 6 is 9/2, corresponding to option D.
Explanation:
The question asks to find the value of y when x = 6, given that the value of y varies directly with x, and y = 12 when x = 16. This is a problem of direct variation, where the relationship between the variables can be represented by the equation y = kx, where k is the constant of variation.
To find k, we use the given values: y = 12 when x = 16. Substituting these into the equation gives 12 = k(16), leading to k = 12/16 or k = 3/4. Then, to find y when x = 6, we substitute x = 6 into the direct variation equation with our found k value: y = (3/4)(6), simplifying to y = 9/2.
Therefore, the value of y when x = 6 is 9/2, which matches option D.
Time 6 years Interest rate 1.9% Principal- $850 What amount of simple interest will be earned? $16.15 O $96.90 $946.90 $9,690.00
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Choose the correct discount or markup. If an item has a retail price retail price = $995 and a discount of 15%, how much is the discount? It is $ options a. 149.25 b. 139.25 c. 144.50
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So the correct answer is (a). 149.25
Final answer:
The discount amount on an item with a retail price of $995 and a 15% discount is $149.25 that is option a is correct answer.
Explanation:
Discount Amount Calculation:
Calculate the discount amount by multiplying the retail price by the discount percentage.
Discount = $995 x 0.15 = $149.25.
The correct answer is $149.25 (option a).
6.
Evaluate cot 290º. Round your answer to the nearest hundredth.
–1.06
–0.36
2.92
–2.75,
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The solution this is the following:
cot(110°) = -cot(70°)
cot(70°) = -1/tan(70°)
tan(70°) ≈ 2.75
-1/tan(70°) ≈ -0.36
PLEASE HELP!!!!!!!!!!!!!!!!!
IS IT CORRECT?
BRAINLIEST AVAILABLE IF 2 PPL ANSWER
Answers
Parallel lines Q and M are cut by transversal lines j and k.
1) What is the measure in degrees of ∠ 1?
2) What is the measure in degrees of ∠ 2?
3) What is the measure in degrees of ∠ 3?
4) What is the measure in degrees of ∠ 4?
5) What is the measure in degrees of ∠ 6?
Explain how you found∠" 6?".
Answers
1) What is the measure in degrees of ∠ 1?
∠ 1+110=180----> ∠ 1=180-110---> ∠ 1=70°---> angles 1 and 110 are supplementary angles
2) What is the measure in degrees of ∠ 2?
∠ 2+115=180----> ∠ 2=180-115----> ∠ 2=65°---> angles 2 and 115 are supplementary angles
3) What is the measure in degrees of ∠ 3?
∠ 3=∠ 2----> ∠ 3=65°------> angles 3 and 2 are congruent by corresponding angles
4) What is the measure in degrees of ∠ 4?
∠ 4=115---> ∠ 4=115°----> angles 4 and 115 are congruent by corresponding angles
5) What is the measure in degrees of ∠ 6?
step 1
find the value of angle ∠7
we know that
∠1 +∠2 +∠7=180---------> (sum of the internal angles of a triangle
∠7=180-(∠1 +∠2)------> ∠7=180-(70+65)----------> ∠7=45°
∠6=∠7----------> ∠6=45°--------------> angles 6 and 7 are opposed by the vertex, so they are congruent.
Find the length of a line segment with endpoints of -9 and 7.
I don't understand how to do this.
A.-16
B.-2
C.16
D.26,
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evaluate the principal square root of 36 .
answer ??? help plz thank u :)),
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10) The amount of money a worker makes varies directly with the hourly rate of pay. Worker A earns $168 for an 8 hour period. Worker B earns the same hourly rate as Worker A, but works for only 6 hours. What does Worker B earn?
A) $1008
B) $126
C) $1344
D) $160
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so
$21 × 6 hours = $126
Worker B earns B) $126
$126 is correct. The hourly rate is $168/8 = $21, so the amount earned is (6)($21) = $126.
What is the value of x in the figure below? In this diagram, ΔABD ~ ΔCAD
Answers
16x = 100
x = 100/16
x = 25/4
answer is F. 25/4
Value of x for the similar triangles ΔABD ~ ΔCAD is equals to [tex]\frac{25}{4}[/tex].
What are similar triangles?" Similar triangles are defined as the triangles with same shape but different in their size, corresponding sides of similar triangles are always in proportion."
According to the question,
As per the diagram,
ΔABD and ΔCAD are similar triangles.
AB = 10 units
BD = x units
BC = 16 units
CD = BC - BD
= 16 - x
ΔABD is a right angle triangle.
Therefore,
Using Pythagoras theorem,
[tex]AD ^{2} = 10^{2} -x^{2}[/tex]
ΔABD corresponding ΔCAD as per the given diagram.
From the definition of similar triangles corresponding sides are in proportion.
[tex]\frac{AD}{CD} =\frac{BD}{AD}[/tex]
⇒[tex]AD^{2} =(BD )(CD)[/tex]
Substitute the value of AD, BD and CD we get,
[tex]10^{2} -x^{2} = (x) (16-x)[/tex]
⇒[tex]100 -x^{2} =16x-x^{2}[/tex]
⇒[tex]100 = 16x[/tex]
⇒[tex]x= \frac{100}{16}[/tex]
⇒[tex]x=\frac{25}{4}[/tex]
Hence, Option(F) is the correct answer.
Learn more about similar triangles here
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A key difference between calculating the sample mean and the population mean is that:
a.we use and n instead of µ and n.
b.we divide the sum of the observations by n - 1 instead of n.
c.the sample observations are ranked and the middle value is selected as the population mean.
d.there are no differences.
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Final answer:
The key difference between calculating the sample mean and the population mean is that when calculating the sample mean, we use x and n instead of µ and n. Additionally, we divide the sum of the observations by n - 1 instead of n. Correct Option -B
Explanation:
The key difference between calculating the sample mean and the population mean is that when calculating the sample mean, we use x and n instead of µ and n. Additionally, we divide the sum of the observations by n - 1 instead of n.
The reason for dividing by n - 1 in the sample mean calculation is that it provides a better estimate of the population variance. Dividing by n - 1 instead of n accounts for the fact that the sample mean is an estimate of the population mean based on a limited set of data.
The slope of the line whose equation is x+2y=3 is
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Let m = slope in the picture.
find the second, fourth, and eleventh terms of the sequence described by each explicit formula A(n)=2+(n-1)(-2.5)
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A(n)=2+(n-1)(-2.5)
where n is the number of terms
To get the terms required we simply substitute our values on the expression
the 2nd term will be:
A(2)=2+(2-1)(-2.5)
A(2)=2+1(-2.5)
A(2)=-0.5
the fourth term will be:
A(4)=2+(4-1)(-2.5)
A(4)=2+3(-2.5)
A(4)=2-7.5
A(4)=-5.5
the eleventh term will be:
A(11)=2+(11-1)(-2.5)
A(11)=2+10(-2.5)
A(11)=2-25
A(11)=-23
Jill had an AGI of $25,000. She had $2800 in medical expenses, paid $6000 in rent, and had to buy a new uniform for work, which was not reimbursed by her employer. Which expense(s) can she itemize on her tax return?
A.Nonreimbursed work expenses, mortgage interest, and medical expenses
B.Mortgage interest and medical expenses
C.Medical expenses and nonreimbursed work expenses.
D.Mortgage interest only
Answers
Answer:
C.Medical expenses and nonreimbursed work expenses.
Step-by-step explanation:
just did it on apex
Answer:
C
Step-by-step explanation:
Medical expenses and nonreimbursed work expenses.
MEDAAAL :D
You invest $2,000 in an account that is compounded annually at an interest rate of 5%. You never withdraw money from the account. How much money will be in the account after 4 years?,
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How to solve
187=1/2*17(6+X)
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A trinket factory can produce 3,000 trinkets per day. The warehouse has a capacity of 50,000 trinkets. Currently, there are 8,000 trinkets in the warehouse. Assume that no trinkets are going to be shipped out of the warehouse for a while. 1) Write an equation for the number of trinkets in the warehouse after days. 2) How many days will it take to fill the warehouse?
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8,000 + 3,000x = 50,000
How many days will it take to fill the warehouse?
8,000 + 3,000x = 50,000
3,000x = 42,000
x = 14
The equation for number of trinkets after x days is 8,000 + 3000 * x = y and the number of days required to fill the warehouse is 14.
What is an Equation?An equation is a mathematical statement that is formed when two algebraic expressions are equated using an equal sign.
The trinket factory can produce 3,000 trinkets per day
Total Capacity of warehouse is 50,000 trinkets
The trinkets in the warehouse is 8,000
The equation for the number of trinkets in the warehouse after x days is
Let y represents the total number of trinkets after x days
8,000 + 3000 * x = y
The days required to completely fill the warehouse is
8,000 + 3,000 * x = 50,000
3,000* x = 42,000
x = 14
To know more about Equation
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Find the derivative of f(x) = |x2 – 1| at the point (1, 0).
Answers
meaning, the function is not differentiable at x = 1, graph wise, it simply means is not a "smooth curve", instead is an abrupt edge, or a "cusp" or a "spike", so the graph may be continuous at x = 1, however, is the extremum is not a smooth curve, notice the picture below.
Given sin x = 0.9 , what is cos x ? Enter your answer as a decimal in the box. Round only your final answer to the nearest hundredth.
Answers
Answer:
[tex]cos(x)=(+/-)0.44[/tex]
Step-by-step explanation:
we know that
[tex]sin^{2}(x)+cos^{2}(x)=1[/tex]
In this problem we have
[tex]sin(x)=0.9[/tex]
substitute and solve for cos(x)
[tex]0.9^{2}+cos^{2}(x)=1[/tex]
[tex]cos^{2}(x)=1-0.9^{2}[/tex]
[tex]cos^{2}(x)=0.19[/tex]
[tex]cos(x)=(+/-)0.44[/tex]
Final answer:
The value of cos x is approximately ±0.44.
Explanation:
Given that sin x = 0.9, we need to find cos x. We can use the Pythagorean identity, which states that sin2(x) + cos2(x) = 1. Since we are given sin(x), we can rearrange the identity to solve for cos(x) as follows:
sin2(x) + cos2(x) = 1
cos2(x) = 1 - sin2(x)
cos2(x) = 1 - (0.9)2
cos2(x) = 1 - 0.81
cos2(x) = 0.19
Now, take the square root of both sides to find cos(x). Since the square root has both a positive and a negative value, and we do not have information about the angle's quadrant, we consider both possibilities.
cos(x) = ±0.43589
We can round the cosine value to the nearest hundredth. However, without knowing the quadrant, we cannot definitively determine the sign of cos(x). Assuming the angle is in the first quadrant where both sine and cosine are positive, cos(x) = +0.44.
Which high school math course, algebra or geometry, is more closely related to engineering? justify your answer?
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Algebra: is the name that identifies a branch of Mathematics that uses numbers, letters and signs to be able to refer to multiple arithmetic operations.
Geometry: Part of the mathematics that studies the extension, the way of measuring it, the relationships between points, lines, angles, planes and figures, and the way they are measured.
For the study of engineering requires extensive knowledge in different fields of mathematics. However, as the engineer must handle an endless number of equations, more knowledge in algebra is more important.
Answer:Algebra.
Final answer:
Both algebra and geometry are integral to engineering, with algebra being more directly related to the numerical problem-solving aspects, and geometry being crucial for spatial understanding and design. A well-rounded engineering education incorporates both, to prepare students for advanced mathematical concepts and engineering science courses.
Explanation:
Both algebra and geometry are closely related to engineering, but they serve different purposes within the field. Algebra is fundamental for problem-solving and numerical analysis in engineering. It allows for the creation of mathematical models that can describe physical processes, and is often used alongside computer programs to solve complex real-life problems. Geometry, on the other hand, is essential for a thorough understanding of spatial relationships and structures, which are critical in fields such as mechanical, civil, and architectural engineering.
I need both answers now!
Answers
Answer Is (B)
Part B:
Answers are: (C and E)
Hope this helps.
How many pairs of parallel line segments are shown?
1. 8
2. 24
3. 4
4. 18
Answers
We then have as parallel edges:
AC and GE
CG and AE
CD and GH
AB and EF
BD and HF
DH and BF
CD and EF
GH and AB
Answer:
8 pairs of parallel lines
Answer:
4. 18
Explanation:
Gradpoint
The number of members f(x) in a local swimming club increased by 30% every year over a period of x years. The function below shows the relationship between f(x) and x:
f(x) = 10(1.3)x
Which of the following graphs best represents the function?
Graph of f of x equals 1.3 multiplied by 10 to the power of x
Graph of exponential function going up from left to right in quadrant 1 through the point 0, 0 and continuing towards infinity
Graph of f of x equals 10 multiplied by 1.3 to the power of x
Graph of f of x equals 1.3 to the power of x
Answers
f(x) = 10(1.3)^x
The graphs that best represents the function is:
Graph of f(x) equals 10 multiplied by 1.3 to the power of x.
Step-by-step explanation:The function that shows the relationship between f(x) and x: is:
[tex]f(x)=10\times (1.3)^x[/tex]
a)
Graph of f(x) equals 1.3 multiplied by 10 to the power of x.
This means that the expression is given by:
[tex]f(x)=1.3\times (10)^x[/tex]
Hence, option: a is incorrect since it is not equal to the given function f(x).
b)
Graph of exponential function going up from left to right in quadrant 1 through the point (0, 0) and continuing towards infinity.
In the given function f(x) when x=0 we have:
[tex]f(x)=10\times (1.3)^0\\\\\\f(x)=10\neq 0[/tex]
Hence, option: b is incorrect.
c)
Graph of f(x) equals 10 multiplied by 1.3 to the power of x.
This means that the function f(x) is given by:
[tex]f(x)=10\times (1.3)^x[/tex]
which is obviously true.
Hence, option: c is correct.
d)
Graph of (x) equals 1.3 to the power of x.
This means that the function f(x) is given by:
[tex]f(x)=(1.3)^x[/tex]
which does not m,atches the actual expression.
Hence, option: d is incorrect.
Some of the steps for completing the square to solve
x2 + 5x = 2 are shown.
x2 + 5x = 2
x2 + 5x + = 2 +
Answers
5/2=2.5
2.5²=6.25 or 25/4
Then add this number to both sides and simplify.
x²+5x+25/4=2+25/4
x²+5x+25/4=33/4
Factor the left side using reverse foil. Hint: the number that you are adding/subtracting by should be the number you got when you divided the coefficient of x by 2
(x+5/2)²=33/4
√(x+5/2)²=√(33/4)
x+5/2=33/4 or x+5/2= -33/4
x=23/4 or x=-43/4
A dealer dealt the following cards from a shuffled deck:
3 , 2 , 2 , A , K , Q , K , 5 , 2 , 6
4 , 5 , K , 2 , 7 , 6 , A , J , J , A
What was the experimental probability of dealing a black card?
can someone help will give medal 8 cards are black and12 are red pleaaaasseee help do i divide 20 by 8 or 8 by 20,
Answers
Well we know that there are 20 cards as given by the equation. And there are 8 black cards.
8/20= .40 or 40% the answer for me is C. 40%
Answer: c is the answer is 40 hope u get it right goodluck
Step-by-step explanation:
Two numbers are in the ratio of 2 to 3. If the smaller number is 18, the larger number is _____. 21 27 36 54
Answers
the answer is 27
Answer: If two numbers are in a ratio of 2 to 3, this means that two times one number is equal to 3 times the other, or:
2*X = 3*Y, where X and Y are any numbers, and X is the bigger one and Y is the smaller one.
If Y=18, then:
2*X = 3*18 = 54
X=54/2 = 27
So the answer is 27.
a building in san francisco is shaped like a square pyramid it has a slant height og 856.1 feet and each side of its base is 145 feel long find the lateral area of the building
Answers
for a Square Pyramid
[lateral area]=4*[a*s/2]--------> 2aS
where
a is the length side of the square base
S is the slant height
a=145 ft
S=856.1 ft
[lateral area]=2*145*856.1---------> 248269 ft²
the answer is 248269 ft²
Jamie has 4 apples and 6 bananas. Each apple cost 0.75 and each banana cost 0.6” write an expression representing the total cost
Answers
answer: 6.6
4 x 0.75 + 6 x 0.6 = 6.6
Enjoy.
~Isabella