Answer:
w=-8
Step-by-step explanation:
take both sides and divide by 7
(w+13)=5
subtract both sides by 13
w=-8
In a survey of 2,800 people who owned a certain type of car, 560 said they would buy that type of car again. what percent of the people surveyed were satisfied with the car?
20%
2800/560
= 0.2%
=20%
Algebra Question
Let v = (-7,6,-6) and w = (-5,-3,-6) be vectors in R^3. Find the orthogonal projection of v onto w.
Answer:
Projection on w: (-54/14, -159/70, -159/35)
I have the correct answer but I don't know how they got it.
The orthogonal projection of vector v onto vector w in R^3 is (-54/14, -159/70, -159/35).
To find the orthogonal projection of v onto w, we need to calculate the scalar projection of v onto w and multiply it by the unit vector of w. The scalar projection of v onto w is given by the formula:
proj_w(v) = (v⋅w) / (w⋅w) * w
where ⋅ denotes the dot product.
Calculating the dot product of v and w:
v⋅w = (-7)(-5) + (6)(-3) + (-6)(-6) = 35 + (-18) + 36 = 53
Calculating the dot product of w with itself:
w⋅w = (-5)(-5) + (-3)(-3) + (-6)(-6) = 25 + 9 + 36 = 70
Now, substituting these values into the formula, we have:
proj_w(v) = (53/70) * (-5,-3,-6) = (-54/14, -159/70, -159/35)
Therefore, the orthogonal projection of v onto w is (-54/14, -159/70, -159/35).
In simpler terms, the orthogonal projection of v onto w can be thought of as the vector that represents the shadow of v when it is cast onto the line defined by w. It is calculated by finding the component of v that aligns with w and multiplying it by the direction of w. The resulting vector (-54/14, -159/70, -159/35) lies on the line defined by w and represents the closest point to v along that line.
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Triangle ABC = Triangle ADF, AD = 18, BC = 17, DF= [?]
The value of the length DF is 17
How to determine the length DF?The statement Triangle ABC = Triangle ADF means that the triangles ABC and ADF are congruent triangles.
So, we have:
AB = AD
AC = A F
BC = DF
Given that BC = 17;
The equation BC = DF becomes
17 = DF
Rewrite as:
DF = 17
Hence, the value of the length DF is 17
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Rs 600 will gave Rs 90 simple interest at 5 % per annum.
Step-by-step explanation:
interest=90
principal=600
rate=5%
time = I × 100/p×r
= 90×100/600×5
= 3 years.
DOUBLE CHECKING!! PLS HURRY, ONLY 10 MIN LEFT 20 PTS!! PLS HELP!!
Answer: 24
Step-by-step explanation:
8 x 6 x 3 is 144
5 x 4 x 3 is 60
144 minus 60 is 84
Which equation is equivalent to this equation and written with the same base?
4x+1=16x−1
Answer:
\( 2^{2x + 2} = 2^{4x - 4} \)
Step-by-step explanation:
\( 4^{x + 1} = 16^{x - 1} \)
\( 2^{2(x + 1)} = 2^{4(x - 1)} \)
\( 2^{2x + 2} = 2^{4x - 4} \)
HELPPPP PLEASE help❗️
Answer:
The second box is correct.
Step-by-step explanation:
Answer:
its the first one to the left
Step-by-step explanation:
hope I helped :)
Please someone help me quickly
Step-by-step explanation:
The domain tells us the possible x values in a function.
Look at the function, it has a open circle at x=-4 and it has a closed circle at x=6. This means that we can any value of number that is between negative 4 and 6. It cannot be negative 4 since it has a open circle so our domain is
\( - 4 < x \leqslant 6\)
The range is possible y values. Looking at the function, the lowest y value is at y=-3 and it has a open circle,
the highest y value is 3 and it at a closed circle.
This means we can have any y value from -3 and 3 but not -3 since it at a open circle so our range is
\( - 3 < y \leqslant 3\)
Convert the rectangular coordinates to polar coordinates
(1, -9)
The polar coordinates of (1, -9) are (9.06, -1.47 radians).
To convert from rectangular coordinates to polar coordinates, we can use the following formulas:
r = √(x² + y²)
θ = tan⁻¹(y/x)
where r is the distance from the origin to the point, and θ is the angle between the positive x-axis and the line connecting the origin to the point.
In this case, x = 1 and y = -9. Plugging these values into the formulas, we get:
r = √(1² + (-9)²) = √82 ≈ 9.06
θ = tan⁻¹((-9)/1) ≈ -1.47 radians
Therefore, the polar coordinates of (1, -9) are (9.06, -1.47 radians). The distance from the origin to the point is approximately 9.06 units, and the angle between the positive x-axis and the line connecting the origin to the point is approximately -1.47 radians (or approximately -84.26 degrees).
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Enter each answer as a whole number or a fraction, or DNE for Does Not Exist or undefined.
The answers both as whole numbers and fractions are given below:
\(\frac{-1}{6}\)51What is the limit of a function?In mathematics, the limit of a function is the value that the function approaches as its input (independent variable) gets arbitrarily close to a certain value, often denoted as a.
More precisely, given a function f(x), the limit of f(x) as x approaches a, written as "lim x → a f(x)", is the value that f(x) approaches as x gets arbitrarily close to a, but not necessarily equal to a.
If the limit exists and is equal to L, then we can write it as:
lim x → a f(x) = L
To solve this,
using the graph of y = f(x)
\(\lim_{x \to 4^+\} \frac{f(x) - 4}{f(x+3)}\) = 3-4/6 = -1/6
\(\lim_{x \to 1^-\}{f(fx) +4) = f(4 +4) = f(8)\) = 5
\(\lim_{h \to 0\} \frac{f(2+h) - f(2)}{h}\) = f^1(2) = 1
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x + 121 = 4x - 20 what is x
Answer:
x = 47
Step-by-step explanation:
x + 121 = 4x - 20
-3x + 121 = - 20
-3x = -141
x = 47
So, the answer is x = 47
The spray from a sprinkler reaches 21 feet from the sprinkler and creates a circle as it spins. What is the circumference of the circle sprayed by the sprinkler? Use 22/7 for π.
C=πd
r=21
d=42
C=132 ft, and D is your final answer. Hope it help!
Answer:
132
Step-by-step explanation:
D
Use all the six numerals 4, 5, 6, 7, 8 and 9 to form two 3-digit even numbers whose sum is smallest, and what is the sum?
9514 1404 393
Answer:
476 +598 = 1074
Step-by-step explanation:
In order for the sum to be smallest, the two most-significant digits must be the smallest possible. That is, they must be 4 and 5.
The two least-significant digits must be even. The remaining even digits are 6 and 8. Then the tens digits are the digits left over: 7 and 9.
Possible sums are ...
476 +598 = 1074
478 +596 = 1074
496 +578 = 1074
498 +576 = 1074
The sum is 1074.
A local hamburger shop sold a combined total of 769 hamburgers and cheeseburgers on Saturday. There were 69 more cheeseburgers sold than hamburgers.
How many hamburgers were sold on Saturday?
Answer:
If you subtract 69 from 769 giving you 700 and divide by 2. You will be get 350 hamburgers and 419 cheeseburgers.
Help pls i don not get it
The value of a specific piece of machinery depreciates at a rate of 10% per year. The initial value of the machinery is $400. Write a formula that models the value of the machine after "t" years.
Please answer fast thank you
Answer: Y= 400 (1-0.1t)
Step-by-step explanation:
Y the value after depreciation period
400 initial value
0.1 dep rate
T time
Which One Doesn’t Belong?
7.9x
7.9 (-10)
7.9 + x
-79
Answer:
7.9 + x because they all equal -79 except that one
Please help!!!
The purple shape is a dilation of the black shape. What is the scale factor or the dial action?
Answer:
I belive it would be 1/5. ;;;
Find the value of x.
110
(4x +90)°
x = [?1°
x=5
steps
they are vertical angles
they are equal
4x+90=110
4x=20
x=5
Answer:
Step-by-step explanation:
9900
2 = 2x+7 find the value of the variable
Explanation
\(2=2x+7\)
Step 1
subtract 7 in both sides
\(\begin{gathered} 2=2x+7 \\ 2-7=2x+7-7 \\ -5=2x \end{gathered}\)Step 2
divide both sides by 2
\(\begin{gathered} -5=2x \\ \frac{-5}{2}=\frac{2x}{2} \\ x=\frac{-5}{2} \end{gathered}\)so, the answer is x=-5/2
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Tim is taking the path shown to bike to Greg's house. Tim travels an average speed of 15 mi/hr.
Determine how much time it will take Tim to get to Greg's house. (You may use decimals here)
Answer:
Road:
Distance to Greg's house = 3.2 + 1.7 =
4.9 miles
Time to get to Greg's house =
(4.9 mi)/(15 mi/hr) = about .327 hours = about 19.6 minutes (19 minutes, 36 seconds)
Shortcut:
Distance to Greg's house:
\( \sqrt{ {3.2}^{2} + {1.7}^{2} } = 3.6235 \)
Time to get to Greg's house:
(3.6235 mi)/(15 mi/hr) = about .242 hours = about 14.49 minutes (14 minutes, 30 seconds)
The shortcut is about 4.9 - 3.6235 = 1.28 miles faster (about 5.11 minutes, or 5 minutes, 6 seconds faster)
Ders: Attempt 1
Question 1 (3 points)
A tourist exchanged $1,000 US dollars for 910 British pounds. How many
pounds did she receive for each US dollar?
To solve set up a proportional equation and cross multiply.
She earned 0.91 pounds for every $1 US dollar when a visitor traded $1,000 US dollars for 910 British pounds.
What is proportion?A proportion is an equation that sets two ratios equal to each other. For example, if there is one guy and three girls, the ratio may be written as 1: 3. (for every one boy there are 3 girls) One-quarter are males and three-quarters are girls. 0.25 are males (by dividing 1 by 4). According to the notion of proportion, two ratios are in proportion when they are equivalent. It is a formula or statement that shows that two ratios or fractions are equivalent.
Here,
For 910 pounds, she spent $1000 US dollars.
For $1,
=910/1000 pound
=0.91 pounds
For each $1 US dollar, she received 0.91 pounds as tourist exchanged $1,000 US dollars for 910 British pounds.
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Perform the arithmetic operation
(5/3)^0*2^-1
Answer:
0.5
Step-by-step explanation:
Answer:
0.5
Step-by-step explanation:
Rebekah wants to read a certain number of pages each day during summer vacation. Today, she read 186 pages, which is 132% of her goal. How many pages does Rebekah want to read each day?
Rebekah wants tο read apprοximately 140.91 pages each day during summer vacatiοn. We can rοund this tο 141 pages per day.
What is the percentages?Percentage is a way οf expressing a number as a fractiοn οf 100.
Let x be the number οf pages Rebekah wants tο read each day.
Accοrding tο the prοblem, she read 132% οf her gοal tοday, which is 186 pages:
132% οf x = 186
Tο sοlve fοr x, we can start by cοnverting the percentage tο a decimal:
132% = 132/100 = 1.32
Sο the equatiοn becοmes:
1.32x = 186
Dividing bοth sides by 1.32, we get:
x = 186/1.32
x ≈ 140.91
Hence, Rebekah wants tο read apprοximately 140.91 pages each day during summer vacatiοn. We can rοund this tο 141 pages per day.
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A round jacuzzi has a radius of 135 cm. It is measures 90 cm deep . How many liters of water does the jacuzzi hold ?
A round jacuzzi has a radius of 135 cm. It is measures 90 cm deep .
To find How many liters of water does the jacuzzi hold, that is to find the volume of the semicirlce.
The formula o find the volume of the semi circle is,
\(V=\pi r^2h\)where r= 135 and h= 90.
\(\begin{gathered} V=\pi(135)^2\cdot90 \\ =3.14\cdot18225\cdot90 \\ =5150385cm^3 \end{gathered}\)The jacuzzi can hold 5150.385 liters of water.
In this triangle what is the value of x
Answer:
Step-by-step explanation:
error
Answer:
x ≈ 75.2
Step-by-step explanation:
using the tangent ratio in the right triangle
tan62° = \(\frac{opposite}{adjacent}\) = \(\frac{x}{40}\) ( multiply both sides by 40 )
40 × tan62° = x , then
x ≈ 75.2 ( to the nearest tenth )
Which of the following is most likely the next step in the series?
The correct pattern of the series is option B.
What is Series?
Throughout the series, these phrases exhibit a consistent pattern. The candidate is expected to analyse the examples provided, recognise the patterns in the examples, and either finish the examples with the best possible replacement or identify the incorrect term in the examples.
Here the given series in first step we have blue quarter.
Then, next step blue quarter succeed by red quarter.
And the its followed by blue quarter Similarly here we have to follow this pattern , Then We can get Red Quarter.
In given option B is follow the pattern of the series.
Hence the correct option is B.
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Please help urgent thank you
If he wants an average of 84, he needs to get at least 93 points.
What score does he need to get in the next test?Remember that the average value between 3 values A, B, and C is:
(A + B + C)/3
Here we know that the first two scores are 76 and 83 points, let's say that the third score is x, if we want to have an average of 84 or more, then we need to solve:
(76 + 83 + x)/3 = 84
159 + x = 252
x = 252 - 159
x = 93
So he needs to get at least 93 points in the next exam.
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Question:
The graph shows the number of each kind of CD in Dante's collection. What is the probability that a randomly chosen CD is Hip-Hop?
Answer:
1/5
Step-by-step explanation:
total CDs = 6 + 10 + 4 + 8 + 12 = 20 + 20 = 40
hip hop = 8
8/40
(8:8)/(40:8)
1/5
What percent is16 out of 64? It is _ .