The measure of angle D, m∠D, found using the specified lengths of the three sides of the triangle and the law of cosines is; m∠D = 75.7°
What is the law of cosines?The law of cosines specifies the relationship between the measures of an angle, and the lengths of the three sides of a triangle. Specifically, the law of cosines states that the square of the length of a (reference) side of a triangle, is equivalent to the sum of the squares of the lengths of the other two sides, less the product of 2, the lengths of the other two sides and the cosine of the angle opposite to the reference side.
Mathematically, the law of cosines can be presented as follows;
a² = b² + c² - 2·b·c·cos(A)Where;
a, b, and c are the lengths of the three sides of the triangle
Angle A, ∠A, is the opposite angle to side a.
Therefore, according to the law of cosines, we get;
38² = 36² + 24² - 2 × 36 × 24 × cos(∠D)
2 × 36 × 24 × cos(∠D) = 36² + 24² - 38² = 428
2 × 36 × 24 × cos(∠D) = 428
cos(∠D) = 428/(2 × 36 × 24) = 428/1728 = 107/432
cos(∠D) = 107/432
m∠D = arccos(107/432) ≈ 75.7°
The measure of angle D, m∠D ≈ 75.7°
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What is Jana’s unit rate if she rides 15 miles in 50 minutes?
Show your work.
The unit rate of Jana's ride is 0.3 Miles per minutes
What is unit rate?A unit rate means a rate for one of something. We write this as a ratio with a denominator of one. For example, if you ran 70 yards in 10 seconds, you ran on average 7 yards in 1 second. Both of the ratios, 70 yards in 10 seconds and 7 yards in 1 second, are rates, but the 7 yards in 1 second is a unit rate.
The unit rate of Jane's ride is
= 15miles/50minutes
= 0.3miles per minute
therefore the unit rate of Jane's ride is 0.3 miles per minute.
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or After sales tax, a $27 telephone costs $27.27. What is the sales tax percentage?
The sales tax on telephone is 1 percent.
What is the sales tax?Calculating the sales tax applied to a purchase is a matter of simply multiplying the tax rate by the purchase price using the equation sales tax = purchase price × sales tax rate. Adding the sales tax to the original purchase price gives the total price paid with tax.
Given that, after sales tax, a $27 telephone costs $27.27.
Here, sales tax =27.27-27
= 0.27
Now, tax rate is 0.27/27 ×100
= 1%
Therefore, the sales tax on telephone is 1 percent.
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The leader of two women's support groups is interested in the depressive levels
Answer:
Step-by-step explanation:
The mean depression level for the first group is μ₁ = 16.
The mean depression level for the second group is μ₂ = 12
The weighted mean is closer to 12 than to 16.
The calculated weighted mean for CES-D is 13.5
The calculated weighted mean for MAST is 17.25 ≈ 17.0 rounded to 17.
Calculating the weighted mean μ
μ= {where x1 =μ₁ and x2= μ₂ }
μ= 16×6 + 10×12/ 6+10
μ= 216/16
μ= 13.5
The first group has a mean score of μ₁= 18.
The second group has a mean score of μ₂ = 14
Calculating the weighted mean μ
{where x1 =μ₁ and x2= μ₂ ; w1= number of women in the first group and w2= number of women in the second group}
μ=
μ= 18×6 + 14×12/ 6+10
μ= 276/16
μ= 17.25≈ 17
1 1/2 x 1 1/2 x 1 1/2
Answer: 3 3/8 or 3.375
Step-by-step explanation:
Answer:
3.375
Step-by-step explanation:
Simplify using the log properties then evaluate.
log2 5+ log2 6.4
[tex]\begin{array}{llll} \textit{logarithm of factors} \\\\ \log_a(xy)\implies \log_a(x)+\log_a(y) \end{array} \\\\\\ \begin{array}{llll} \textit{Logarithm Cancellation Rules} \\\\ \stackrel{\textit{we'll use this one}}{log_a a^x = x}\qquad \qquad a^{log_a x}=x \end{array} \\\\[-0.35em] ~\dotfill\\\\ \log_2(5)+\log_2(6.4)\implies \log_2( ~~(5)(6.4) ~~ )\implies \log_2(32) \\\\\\ \log_2(2^5)\implies \text{\LARGE 5}[/tex]
is 1/6 equivalent to 2/8
Answer:
no. 2/8 is equivalent to 1/4 and not equal to 1/6
A cell phone company uses the function below to determine the cost, C, in dollars for g gigabytes of data transfer.
The value of the function at g = 1 and g = 4 will be 55 and 105, respectively.
What is a function?A function is an assertion, concept, or principle that establishes an association between two variables. Functions may be found throughout mathematics and are essential for the development of significant links.
The function is given below.
C(g) = 55 if 0 < g < 2
C(g) = 25g + 5 if g ≥ 2
The value of the function at g = 1 is given as,
C(1) = 55
The value of the function at g = 4 is given as,
C(4) = 25(4) + 5
C(4) = 100 + 5
C(4) = 105
The value of the function at g = 1 and g = 4 will be 55 and 105, respectively.
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∠A and ∠B are complementary angles. If m∠A = (2x-20) and m∠B = (3x+1) then find the measure of ∠A
Answer:
∠ A = 23.6°
Step-by-step explanation:
complementary angles sum to 90°
sum the 2 angles and equate to 90
2x - 20 + 3x + 1 = 90
5x - 19 = 90 ( add 19 to both sides )
5x = 109 ( divide both sides by 5 )
x = 21.8
Then
∠ A = 2x - 20 = 2(21.8) - 20 = 43.6 - 20 = 23.6°
(9m)^4 without exponits
Answer:
6561m^4
Step-by-step explanation:
(9m)^4 =
(9 * m)^4 =
9^4 * m^4 = ==> distribute the power 4 to 9 and m
6561 * m^4 = ==> simplify
6561m^4
Cuantas x y Z hay en la expresión 2x-3z*4/2z+1x+10z+3x
Si me explican el procedimiento para sacar la respuesta porfavor? Gracias
The simplified expression for this problem is given as follows:
6x + 16z.
How to simplify the expression?The expression for this problem is defined as follows:
2x-3z*4/(-2)+1x+10z+3x
The quotient has the higher precedence, hence it is given as follows:
3z * 4/(-2) = 12z/(-2) = -6z.
Then the expression is given as follows:
2x + 6z + x + 10z + 3z.
The like terms are given as follows:
2x, x and 3x: 6x.6z and 10z: 16z.Hence the simplified expression is given as follows:
6x + 16z.
TranslationThe problem asks to simplify the expression 2x-3z*4/2z+1x+10z+3x.
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Select the GCF of these numbers. 2^5 · 5· 11 and 2^3· 5^2 · 7
Answer:
To find the GCF of 2^5·5·11 and 2^3·5^2·7, we first prime factorize each number:
2^5·5·11 = 2^5 x 5 x 11
2^3·5^2·7 = 2^3 x 5^2 x 7
Next, we look for the highest power of each prime factor that they both have in common:
2^3 is the highest power of 2 that both numbers have.
5^2 is the highest power of 5 that both numbers have.
So, the GCF of 2^5·5·11 and 2^3·5^2·7 is 2^3 x 5^2 = 180.
Step-by-step explanation:
The first row of a bank statement shows:
OA. deposits that have increased the balance.
OB. withdrawals that have decreased the account balance.
C. the account's balance at the end of the period.
D. the account's balance at the beginning of the period.
The first row of a bank statement shows -
Option D : The account's balance at the beginning of the period.
What is bank statement?
A bank statement, also known as an account statement, is a record that summarises all of an account's transactions for a given month and is normally issued by the bank to the account holder each month.
The transactions for a bank account over a specific time period, typically monthly, are listed in a bank statement.
The statement provides the beginning and ending balances for the period along with deposits, charges, and withdrawals.
Every month, account holders typically analyse their bank statements to assist them keep track of their spending and costs and to check for any erroneous or fraudulent charges.
Therefore, the first row shows the balance at the beginning period.
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Choose the algebraic expression that represents the area of a triangle that has a base 8 inches less than 2 times wider than the height.
The algebraic expression for the area is:
A = (2H - 8)*H/2
How to write the algebraic expression?Here we want to write the expression:
"the area of a triangle that has a base 8 inches less than 2 times wider than the height."
Remember that for a triangle of base B and height H, the area is:
A = B*H/2
So if the base is 8 inches less than 2 times the height, we can write:
B = 2*H - 8
Replacing that in the area equation we get:
A = (2H - 8)*H/2
That is the equation for the area.
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Kevin has half of his investments in stock paying an 11% dividend and the other half in a stock paying 14% interest. If his total annual interest is $480, how much does he have invested?
Kevin has $3840 invested in stocks in total.
What is Interest?Interest is the sum of money that must be repaid on a loan or received in exchange for a loan. Principal refers to the borrowed or lent funds. The Amount is the total of the principal plus interest.
Given:
Annual interest in first investment - 11%
Annual interest in other investment - 14%
Total interest annually - $480
let the investment for each stock be x.
then total investment = 2x
We can write
0.11x + 0.14x=480
0.25x = 480
x= 480/ 0.25
x= $1920
Also, the total investment = 2x
= 2×(1920)
= 3840
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Choose the grid reference number for the mine shown.
A. 641242
B. 126424
The grid reference number is 623313.
None of the given option is correct.
What is graph?In mathematics, a graph is a visual representation or diagram that shows facts or values in an ordered way.
The relationships between two or more items are frequently represented by the points on a graph.
The grid is given in the attached image.
From the given graph:
The grid number is,
623313.
Therefore, the grid number is 623313.
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Graph the line with slope 3/4 and y intercept -9
A graph of the line with a slope of 3/4 and y-intercept of -9 is shown in the image attached below.
What is the slope-intercept form?Mathematically, the standard form or slope-intercept form of the equation of a straight line is given by this mathematical expression;
y = mx + c
Where:
m represents the slope.x and y are the points.c represents the intercept.Next, we would write an equation of this straight line based on the slope and y-intercept as follows;
y = mx + c
y = 3x/4 + (-9)
y = 3x/4 - 9
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Here are the ingredients needed to make 12 biscuits.
Habib has 400 g of butter
150 g of sugar
675g of flour
Work out the greatest number of biscuits Habib can make.
Optional working
|+
Biscuits
To make 12 biscuits
Answer:
125g of butter
50g of sugar
175g of flour
biscuits
The greatest number of biscuits Habib can make is 25
How to determine the greatest number of biscuits Habib can make.From the question, we have the following parameters that can be used in our computation:
Habib has 400 g of butter
150 g of sugar
675g of flour
Factor each number to determine the GCF
So, we have
400 = 2 * 2 * 2 * 2 * 5 * 5
150 = 2 * 3 * 5 * 5
675 = 3 * 3 * 3 * 5 * 5
So, we have
GCF = 5 * 5
Evaluate
GCF = 25
Hence, the number of biscuits is 25
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What is the sum of the measures of the exterior angles of the polygon shown below? If necessary, round to the nearest tenth.
like and 5 star
The polygon is a regular 9 sided polygon with each exterior angles as 40° and the measure of the sum of the exterior angles of the polygon is 360°
What is the sum of exterior angles of a polygonThe exterior angles of a polygon added together is equal to 360°. No matter what the size of the polygon is, the sum of the exterior angles will always add up to 360°. If the polygon is regular, then each exterior angle measures 360°/n.
the polygon is a 9 sided polygon and thus
each exterior angle derived as;
360°/9 = 40°
40° + 40° + 40° + 40° + 40° + 40° + 40° + 40° + 40° = 360°
Therefore, the 9 sided polygon with each exterior angles as 40° have the measure of the sum of the exterior angles to be 360°
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Put it in slope intercept form
Answer:
y=1/2x-2
Step-by-step explanation:
Slope int. Form is y=mx+b.
Knowing this, we find the slope either using rise/run or or the slope formula. y2-y1/x2-x1
using rise/run, we rise up 1 unit and run over 2 units to the right.
So mx=1/2x.
Then finding the y-intercept we look at the y-axis and look for where the graph intersects the y-axis. In this case the y intercept is already plotted at (0,-2). So b=-2.
Put all of our information together and receive the equation y=1/2x-2.
-Hope this helped
8 square root x^5 divided by square root x = 5/x^8 divided by 1/x^2
The value of x in the expression is 0.9429
How to determine the value of xFrom the question, we have the following parameters that can be used in our computation:
8 square root x^5 divided by square root x = 5/x^8 divided by 1/x^2
Express properly
So, we have
8√x⁵/√x = 5x²/x⁸
Evaluate the quotients
So, we have
8x² = 5/x⁶
Cross multiply
This gives
x⁸ = 5/8
Take the 8th root of both sides
x = 0.9429
Hence, the solution is 0.9429
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If mZVUW = (4x + 6)° and mZWUT = (6x - 10)°, what
is the measure of ZWUT?
O 32°
O 38°
O 48°
O 76⁰
Based on the definition of an angle bisector, the measure of angle WUT is: B. 38°.
What is an Angle Bisector?An angle bisector is a line, ray or segment that divides an angle into two congruent angles.
Therefore:
m<VUW = m<WUT
Substitute
4x + 6 = 6x - 10
Solve for x
4x - 6x = -6 - 10
-2x = -16
x = 8
m<WUT = 6x - 10
Plug in the value of x:
m<WUT = 6(8) - 10 = 38°
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The difference between the monthly high and low temperatures was less than 27° Fahrenheit. The monthly low temperature was –2° Fahrenheit. Select the choices that make the inequality and statement about the possible monthly high temperature correct.
Answer:
The monthly high temperature must be less than 25° Fahrenheit.
a speedboat traveling at a constant speed arrives at its distension in 35 minutes. if it traveled 70 miles, then what was the speedboat's speed?
this is due in 5 mins
Answer:
120 mph
Step-by-step explanation:
t = 35 min = (35 min)/(60 min/hr) = 0.583 hr
d = 70 mi
speed = d/t = (70 mi) / (0.583 hr) = 120 mph
In trapezoid ABCD, line AC is a diagonal and angle ABC is congruent to angle ACD. Find AC if the lengths of the bases line BC and line AD are 12m and 27m, respectively
Since ΔABC and ΔACD are similar triangles, therefore the length of AC is 18 m.
What are Similar Triangles?Similar triangles are triangles with corresponding sides that have the same ratio.
Thus:
AD is parallel to BC (bases of a trapezoid are parallel)
Therefore:
∠ACB = ∠CAD (alternate interior angles)
This implies that, ΔABC ~ ΔACD by AA similarity theorem.
Thus:
AC/DA = CB/AC
Substitute
AC² = 12 × 27
AC = √324
AC = 18 m
Therefore, since ΔABC and ΔACD are similar triangles, therefore the length of AC is 18 m.
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The phone company charges $19.99 per line for the first 3 phone lines and $15.99 for each additional line. Customer ordered 7 lines, how much will they be charge per month?
The total charge for the month is given as follows:
$123.93.
How to obtain the total charge for the month?The total charge for the month is obtained applying the proportions in the context of the problem.
The costs are given as follows:
$19.99 per line for the first three lines.$15.99 per line for each additional line.For a customer with 7 lines, the charges are given as follows:
$19.99 for each of the first three lines.$15.99 for each of the last four lines.Hence the total charge is then calculated as follows:
3 x 19.99 + 4 x 15.99 = $123.93.
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What is the maximum value
of y?
Use the definition of continuity and the properties of limits to show that
The given function is continuous at x = 5, RHL = LHL = F(5)
What is continuity ?In mathematics, The function is called as continuous at the particular value of x, if right hand limit, left hand limit and the value of function at x all are equal.
RHL = LHL = F(x)
Limit exist and continuous
Given that,
F(x) = [x² - 49]/[x² + 6x -7][x² + 14x + 49]
To check whether it is continuous at x = 3
First taking LHL,
[tex]\lim_{h \to \00 } F(x)[/tex]
[tex]\lim_{h \to \00 }[/tex] [(5-h)² - 49]/[(5-h)² + 6(5-h) -7][(5-h)² + 14(5-h) + 49]
⇒ -24/(48x144)
⇒ -1/288
Now, taking RHL
[tex]\lim_{h \to \00 }[/tex] [(5+h)² - 49]/[(5+h)² + 6(5+h) -7][(5+h)² + 14(5+h) + 49]
⇒ -24/(48x144)
⇒ -1/288
The value at x = 3
F(3) = [(5)² - 49]/[(5)² + 6(5) -7][(5)² + 14(5) + 49]
⇒ -24/(48x144)
⇒ -1/288
Hence Proved, RHL = LHL = F(5)
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Engberg Company installs lawn sod in home yards. The company’s most recent monthly contribution format income statement follows: Amount Percent of Sales Sales $ 145,000 100 % Variable expenses 58,000 40 % Contribution margin 87,000 60 % Fixed expenses 24,000 Net operating income $ 63,000 Required: 1. What is the company’s degree of operating leverage? 2. Using the degree of operating leverage, estimate the impact on net operating income of a 22% increase in sales. 3. Construct a new contribution format income statement for the company assuming a 22% increase in sales.
The solution is,
* The company’s degree of operating leverage: 1.38;
* The impact on net operating income of a 22% increase in sales: it will increase by 30.4%;
* New contribution format income statement:
Engberg Company
Contribution format income statement
Amount Percentage of sales
Sales $176,900 100%
Variable expenses 70,760 40%
Contribution margin 106,140 60%
Fixed expenses 24,000
Net operating income 82,140
What is percentage?A percentage is a number or ratio that can be expressed as a fraction of 100. A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%", although the abbreviations "pct.", "pct" and sometimes "pc" are also used. A percentage is a dimensionless number; it has no unit of measurement.
here, we have,
* The company’s degree of operating leverage = Contribution / profit = 87,000/63,000 = 1.38
* The impact on net operating income of a 22% increase in sales is calculated as: Degree of operating leverage x % changes in sales revenue = 1.38 x 22% = 30.4%.
* new contribution format income statement is shown in the answer part.
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HELPPP I need to choose the correct option AND find X?!!!!
Part 1
E. There is a pair of congruent angles and a pair of congruent right triangles, so the triangles are similar by the AA [tex]\sim[/tex] postulate.
Part 2
Note that 4 ft 6 in = 4.5 ft. Using the fact that corresponding sides of similar triangles have proportional side lengths,
[tex]\frac{x}{14}=\frac{4.5}{4} \implies \boxed{x=15.75 \text{ ft}}[/tex]
in the figure, the dashed line divides the arrow in half What is the total area of the arrow?
4am
CA 80square centimeters
08
68 square centimeters
0 32 square centimeters
2cm
2pm
5cm
On solving the provided question, we can say that The area of the arrow is equal to A = A1 + A2 = 68+12 = 80 cm sq.
What is area?The size of an area on a surface can be expressed as an area. The area of an open surface or the boundary of a three-dimensional object is referred to as the surface area, whereas the area of a planar region or planar region refers to the area of a form or planar layer. The total amount of space filled by a planar (2-D) surface or shape of an object is known as its area. Draw a square on a piece of paper using a pencil. a character with two dimensions. The area of a shape on paper is the space it takes up. Imagine that the square is composed of more compact unit squares.
The area of rectangle is equal to
A1 = LW
L = 17cm
W = 4cm
A1 = 68 cm sq.
The area of triangle is equal to
A2 = 1/2*b*h
A2 = 1/2*8*3
A2 = 12 cm sq.
The area of the arrow is equal to
A = A1 + A2 = 68+12 = 80 cm sq.
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The correct question is -
In the figure, the dashed line divides the arrow in half. What is the total area of the arrow? 60 square centimeters 68 square centimeters 80 square centimeters 82 square centimeters