To find out how much money your friend spent at the clothing store, set up a proportion using the information given. Your friend spent $20 at the clothing store.
Explanation:To find out how much money your friend spent at the clothing store, we can set up a proportion using the information given. Let's let x represent the total amount your friend spent.
Since your friend paid $17 for a shirt, and that amount was 85% of the total amount spent, we can set up the equation:
17/x = 85/100
Cross multiplying, we get:
100 * 17 = 85 * x
1700 = 85x
To solve for x, we divide both sides of the equation by 85:
x = 1700 / 85 = 20
Therefore, your friend spent $20 at the clothing store.
nononononononononono
Answer:
yesyesyesyes
Step-by-step explanation:
yesyesyesyesyes
Answer:
yesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyes
The boat is going 10 miles per hour in still water it takes 2 hours to go downstream and 3 hours to go upstream. What’s the speed of the current and distance of the trip?
Answer:
2 mph24 miles one-way; 48 miles round tripStep-by-step explanation:
Let c represent the speed of the current. The travel time is inversely proportional to the travel speed. In one direction the current speed is added to the boat speed; in the other direction, it is subtracted. You can write the relation ...
(10 +c)/(10 -c) = 3/2
2(10 +c) = 3(10 -c) . . . . . . "cross multiply"
20 +2c = 30 -3c . . . . . . . eliminate parentheses
5c = 10 . . . . . . . . . . . . . . . add 3c -20
c = 2 . . . . . . . . . . . . . . . . . divide by 5
The speed of the current is 2 miles per hour.
__
The speed downstream is then (10 +2) = 12 miles per hour. The travel time in that direction is 2 hours, so the distance covered is ...
(12 mi/h)(2 h) = 24 mi
The one-way distance of the trip is 24 miles.
mel paid for three-fourths of the cost of a cake and Gretchen paid the rest. If Mel paid $21, how much did Gretchen pay
Multipli the numbers
$7.00
21/3=7, and 21 is 3/4 of 7*4
Tammy is going for a walk she walks at a speed of 3 miles per hour for 7.5 miles. For how many hours does she walk.
Tammy does walk a time of 3.75 hours
Explanation:
Given-
Speed, (which can be represented as s) = 2 miles/hour
Distance, (which can be represented as d) = 7.5 miles of distance .
Time, t = ?
We know,
d = s t
7.5 miles of distance = 2 miles/hour × t
3.75 hour of time = t
Therefore, Tammy does walk a time of 3.75 hours
Which function is the inverse of f(x) = -5x-42
Answer:
f'(x)=-(x+42)/5
Step-by-step explanation:
Rewrite f(x) as y:
y=-5x-42
Flip x and y and solve for y:
x=-5y-42
x+42=-5y
(x+42)/-5=y
So the inverse function is f'(x)=-(x+42)/5 (note that f' means inverse)
For what integer value of x is 4x – 2 >17 and 3x +5<24 ?
Help me please !!
Answer:
The integer values of x are 5 and 6
Step-by-step explanation:
we have
Inequality A
[tex]4x-2>17[/tex]
solve for x
adds 2 both sides
[tex]4x>19[/tex]
divide by 4 both sides
[tex]x> 4.75[/tex]
solution A is the interval (4.75,∞)
Inequality B
[tex]3x+5<24[/tex]
solve for x
subtract 5 both sides
[tex]3x<19[/tex]
divide by 3 both sides
[tex]x<6.33[/tex]
solution B is the interval (-∞,6.33)
The solution of the inequality A and the inequality B is
(4.75,∞) ∩ (-∞,6.33)=(4.75,6.33)
The integer values of x are 5 and 6
Final answer:
The integer value of x for which both inequalities 4x - 2 > 17 and 3x + 5 < 24 are true is x = 5.
Explanation:
To find the integer value of x for which the inequalities 4x – 2 > 17 and 3x + 5 < 24 are both true, we solve each inequality step by step.
For the first inequality, 4x – 2 > 17, add 2 to both sides to get 4x > 19. Then divide by 4 to isolate x, yielding x > 4.75.For the second inequality, 3x + 5 < 24, subtract 5 from both sides to get 3x < 19. Then divide by 3 to isolate x, resulting in x < 6.3333.Both inequalities must be true, so we need to find the interval where x > 4.75 and x < 6.3333. Since x must be an integer, the only integer within this range is x = 5.it costs $6 for a dozen donuts how much does 1 donut cost
Answer:
.50 for one donut
Step-by-step explanation:
do a ratio 6$ for 12 donuts
so for $ for 1 donut
reduce the first equation for a ration of $1 per two donuts
so it be 50 cents
$6. $0.50
____ = ______
12 donuts. 1 donut
what are the measures of center
Answer: mean, median, mode and range
Step-by-step explanation:
The measures of centre are referred to as mean, median, mode and range.
Mean also referred to as average, it is the sum of values in a data set divided by the number of values in the given data set.
Median is the middle point number in a given data set. Median of an even data set is the average of two values in the middle of the data set.
Mode is the most occurring number in the given data set. It is the number with the highest frequency in the set.
Range is the difference between the highest number and the lowest number in a given data set.
I hope this answers your question.
The measures of center in a dataset are statistical values that represent the central point of the data. These include the mean (arithmetic average), median (middle value), and mode (most frequent value). Another common measure of center is the weighted mean, which is used when some data points carry more significance than others.
Explanation:Measures of the center are statistical measures that provide information about the central point of a dataset. The main measures include the mean, median, and mode.
The mean is the arithmetic average of the data set. This is usually the sum of all data points divided by the number of data points.
The median is the middle value of the data set when it is ordered from smallest to largest. If there is an even number of data points, the median would be the average of the two middle numbers.
The mode is the data point that occurs most frequently in the data set. A data set may have one mode, more than one mode, or no mode at all.
Another common measure of center is the weighted mean, which is useful when some data points carry more significance than others. For example, you might want to calculate the average grade in a class where some assignments are worth more than others.
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what is the expression in simplified form (-9√2)(4√6)
A. -5√8
B. -72√3
C. -36√8
D. -72√2
Answer: -72√3
Step-by-step explanation:
(-9√2)(4√6)
−9√2*4√6
-9*4√2*6
-9*4√12
-9*4*2√3
-72√3
Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! :-)
- Cutiepatutie ☺❀❤
Final answer:
To simplify (-9√2)(4√6), we multiply numerical coefficients (-9) and (4), and the square roots √2 and √6, simplifying to get -72√3 which is option B.
Explanation:
To simplify the expression (-9√2)(4√6), we need to follow the rules of algebraic multiplication for square roots. Here are the steps to simplify the expression:
Multiply the numerical coefficients together: (-9) × (4) = -36.Multiply the square roots together: √2 × √6 = √(2×6) = √12.Now, we simplify √12 by breaking it down into its prime factors: √(4×3) = √4 × √3 = 2√3.Combine the results: -36 × 2√3 = -72√3 which is our final simplified form.The correct option from the given choices is thus B. -72√3.
What missing number would complete the factorization?
k2 + 5k + 6 = (k + 2)(k + ?)
A. 3
B. 6
C. 12
D. 4
Answer:
A. 3Step-by-step explanation:
[tex]k^2+5k+6=k^2+2k+3k+6=k(k+2)+3(k+2)\\\\=(k+2)(k+3)[/tex]
Other method:
[tex]k^2+5k+6=(k+2)(k+x)\qquad\text{use}\ FOIL\\\\k^2+5k+6=(k)(k)+(k)(x)+(2)(k)+(2)(x)\\\\k^2+5k+6=k^2+kx+2k+2x\\\\k^2+5k+6=k^2+(x+2)k+2x\Rightarrow x+2=5\ \wedge\ 2x=6\\\\x+2=5\qquad\text{subtract 2 from both sides}\\x=3\\\\2x=6\qquad\text{divide both sides by 2}\\x=3[/tex]
Write a sequence that has two geometric means between -6 and 2/9
sam has a collection of 76 marbles. In the collection, 25% of the marbles are red and the rest are blue. Which statement accurately describes Samuel's marble collection? 19 marbles are red and 57 marbles are blue. 57 marbles are red and 19 marbles are blue. 16 marbles are red and 60 marbles are blue.
Answer:
Red is 19
Blue is 57
Step-by-step explanation:
According to the question,it says Sam has 25% red marble out of the 76.
It means 25/100×76
It gives 19
To get the value for blue
Blue + red=76
Red is 19
Blue + 19=76
Blue=76-19
Blue=57
Therefore,red is 19 and blue is 57
find the circumference of each circle with the given radius or diameter round to the nearest tenth use 3.14 for pie r=9 cm
Answer:
d=2r
Step-by-step explanation:
What is the equation of the line that passes through the point (-4, 4) and has a
slope of -3
Answer:
[tex]y=-3x+4[/tex]
- A flow of 250 GPM is to be treated with a 2.4 percent (0.2
pounds per gallon) solution of sodium fluoride (NaF). The
water to be treated contains 0.5 mg/L of fluoride ion and
the desired fluoride ion concentration is 1.4 mg/L. What is
the sodium feed rate in gallons per day? Assume the sodium
fluoride has a fluoride purity of 43.4 percent. Select the
closest answer.
1. 19 gal/day
2. 22 gal/day
3. 25 gal/day
4. 28 gal/day
5. 31 gal/day
ANSWER FAST
Assuming that c represents a positive number, which pair best represents f(x) and g(x)?
Answer:
Option A
Step-by-step explanation:
From the graph, we can see both f(x) and g(x) are parabolas that turns upside down.
The parent function for both f(x) and g(x) is
[tex]y = - {x}^{2} [/tex]
We can see that , f(x) is obtain by shifting the parent function up, by c units.
Therefore
[tex]f(x) = - {x}^{2} + c[/tex]
Also we can see that g(x) is half way between f(x) and the origin.
Therefore
[tex]g(x) = - {x}^{2} + \frac{c}{2} [/tex]
Therefore the correct option is A .
How many five-digit numbers are there for which each digit is either equal to both adjacent ones, or differs from its neighbors exactly by 1 (from one smaller by 1, and from the other larger by 1) and which contain the digit 5?
The question is about finding the total count of possible 5-digit numbers that either has identical adjacent digits or differ from its neighbor digits by exactly 1 and containing at least one 5. Providing an exact solution without knowing students' pre-existing knowledge on the subject can be difficult. This kind of problem typically involves methodologies like recursive relationships.
Explanation:This question pertains to combinatorics, a topic in mathematics that deals with countable structures. Specifically, the question is asking how many five-digit numbers are there that follows the conditions given in the question.
The condition that the number contains the digit 5 is applicable for both the cases where the digit is the same as or differs by 1 from its neighbors. This is because 5 is a middle digit from 0 to 9, and it can satisfy both conditions.
The problem can be approached by finding the total count of five digit numbers that satisfy just the adjacent difference conditions, and then subtracting the count of such numbers that do not contain the digit 5.
However, providing a step-by-step solution to this problem would be complex and lengthy, especially without the proper context of the student's pre-existing knowledge. The method to solve it would involve recursive relationships and possibly programming or usage of a suitable mathematical software.
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A square stained glass window is divided into four congruent triangular sections by iron edging to represent the seasons of the year. Each diagonal of the square window measures 9 inches.
A square with diagonals is shown. The diagonals split the square into 4 congruent triangles. The uppercase left triangle is Fall, the uppercase right triangle is winter, the bottom left triangle is summer, and the bottom right triangle is spring.
What is the approximate total length of iron edging needed to create the square frame and the two diagonals?
43.5 inches
50.9 inches
54.0 inches
61.5 inches
Answer:
43.5 inches
Step-by-step explanation:
we know that
The approximate total length of iron edging needed to create the square frame and the two diagonals is given by the formula
[tex]L=4b+2d[/tex]
where
b is the length side of the square
d is the diagonal of the square
we have
[tex]d=9\ in[/tex] ----> given problem
Find the value of b
Remember that the diagonal in a square is given by
[tex]d=b\sqrt{2}\ in[/tex]
substitute the given value of d
[tex]9=b\sqrt{2}[/tex]
solve for b
[tex]b=\frac{9}{\sqrt{2}}\ in[/tex]
Find the total length
[tex]L=4(\frac{9}{\sqrt{2}})+2(9)=43.5\ in[/tex]
Answer:
43.5 in
Step-by-step explanation:
ed said it was right lol
what is the positive solution to the equation 4x^2 + 12x = 135
The positive solution to the equation 4x^2 + 12x = 135 is; x = 9/2
By quadratic formula;
x = {-b ±√(b² - 4ac)}/2awhere, a = 4, b = 12 and c = -135.
By solving the equation quadratically;
The solutions are;
x = 9/2. OR. x = -15/2In essence, the positive solution of the equation is; x = 9/2
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The positive solution to the equation 4x^2 + 12x = 135 is found using the quadratic formula, resulting in a positive root of approximately x ≈ 3.375.
Explanation:The positive solution to the equation 4x^2 + 12x = 135 can be found by first rearranging the equation into the standard quadratic form of ax^2 + bx + c = 0. Bringing all terms to one side gives us 4x^2 + 12x - 135 = 0. This equation can be solved by either factoring, completing the square or using the quadratic formula. Since the original equation does not easily factor into a product of binomials, and the instructions indicate a preference for recognizing a perfect square when possible, we should attempt to complete the square or use the quadratic formula.
To complete the square, we would add (b/2a)^2 to both sides of the equation after dividing the linear coefficient by 2 and squaring the result. However, in this case, it's more straightforward to employ the quadratic formula, which is x = (-b ± sqrt(b^2 - 4ac)) / (2a). Plugging in the values from our equation gives two roots, but since we are only interested in the positive root, we take the solution where the square root term is added to the negative b value.
After calculating, we find that the positive root is x ≈ 3.375, which is the solution to the equation in question.
Two triangles have a scale factor of 5:7, If the area of the smaller triangle is 225cm squared what is the area of the larger triangle
Answer:
441
Step-by-step explanation:
The ratio of sidelengths squares is the ratio of the areas, so the ratio of the area of the smaller triangle's area to the larger triangle's is 25:49.
Using ratios, you figure out that the area of the larger triangle must be 225/25 *49, which is equal to 9*49 = 441
Final answer:
The area of the larger triangle, given a scale factor of 5:7 and the smaller triangle's area of 225cm squared, is 441cm squared. The areas scale as the square of the scale factor, in this case, 25:49.
Explanation:
The question involves working with the scaling of the area of a triangle when given a scale factor between two similar triangles. Since the scale factor of the linear dimensions between the two triangles is 5:7, the ratio of the areas is the square of the scale factor, which is (5:7)2 or 25:49.
If the area of the smaller triangle is 225 cm², to find the area of the larger triangle, we need to use the area ratio. Given that 25 parts correspond to 225 cm²in the smaller triangle, we can calculate the value of 1 part as 225 cm² / 25 = 9 cm2. Hence, the area of the larger triangle corresponds to 49 parts, which gives us 49 * 9 cm² = 441 cm².
What was the population density per square meter ?
Answer:
The population density in people per square meter is 0.005377 people per square meter.
Answer: [tex]0.005377\frac{people}{m^{2}}[/tex]
Step-by-step explanation:
You want to convert [tex]\frac{people}{km^{2} }[/tex] to [tex]\frac{people}{m^{2}}[/tex]
To do this, multiply [tex]\frac{people}{km^{2} }[/tex] * [tex]\frac{1 km}{1000 m}[/tex] * [tex]\frac{1 km}{1000 m}[/tex]=[tex]\frac{people}{1000 * 1000 m^{2}}[/tex]
sub in 5377 for people to get
[tex]\frac{5377people}{1000 * 1000 m^{2}}=0.005377\frac{people}{m^{2}}[/tex]
can someone answer 8-11 please
Answer:
7.9
4.2
9.3
17.8
Step-by-step explanation:
8. √63
the square of 8 is 64 √63 is close to 64 so we can say it's 7.9 approximately
9. √18
the square of 4 is 16, √18 is greater than 16 so we can say it's 4.2 approximately
10. √87
the square of 9 is 81, √87 is greater than 81 so we can say the value of it is approximately 9.3
11. √319
the square of 18 is 324, √319 is smaller than 324 so we can say it's 17.8
Jeremy wants to buy a desktop
computer that costs $1,600. He has
already saved $1,280. What percent
of the total has he saved?
Answer:
80%
Step-by-step explanation:
1280/1600=0.8=80%
An item on sale costs 30% of the original price. The original price was $17.
Answer:
$11.90
Step-by-step explanation:
30% of 17 is 5.10 which means you have to subtract 5.10 from 17
Simplify this algebraic expression completely 9x-6(x+4)
Answer:
3x - 24
Step-by-step explanation:
9x - 6x - 24
3x - 24
write an equation that is parallel to 3x-2y=14 and passes through point (-6,-11)
y = ([tex]\frac{3}{2}[/tex])x -2 is the equation of the required line
Step-by-step explanation:
Step 1 :
Equation of the given line is 3x-2y=14
Re writing this in the form y = mx + c , we have
-2y = -3x +14
y = ([tex]\frac{3}{2}[/tex])x - 7
The co efficient of x , m is the slope of the line. So for the given line the slope is [tex]\frac{3}{2}[/tex]
Step 2 :
We have to find equation of a line which is parallel to this line. All parallel lines will have the same slope. Hence the required line has a slope of [tex]\frac{3}{2}[/tex].
Step 3 :
Equation of line with slope m and passing through a point ([tex]x_{1} ,y_{1}[/tex]) is
(y-[tex]y_{1}[/tex]) = m((x-[tex]x_{1}[/tex])
So equation of line passing through (-6,-11) and with a slope of [tex]\frac{3}{2}[/tex] is
(y-(-11)) = [tex]\frac{3}{2}[/tex] ( x - (-6))
y + 11 = [tex]\frac{3}{2}[/tex] ( x + 6)
y = ([tex]\frac{3}{2}[/tex])x + 9 - 11
y = ([tex]\frac{3}{2}[/tex])x -2
Step 4 :
Answer :
y = ([tex]\frac{3}{2}[/tex])x -2 is the required equation
The given equation has the slope 3/2 after converting to the slope-intercept form. Because parallel lines share the same slope, the equation for the line parallel to the given line, passing through the point (-6,-11), is found to be y = (3/2)x - 9 using the point-slope form.
Explanation:To find an equation that is parallel to a given equation, we must first find the slope of the given line. The equation provided is in the form Ax + By = C. To convert this into slope-intercept form (y = mx + b), where m is the slope, we rearrange the equation to get y = (3/2)x - 7. Therefore, the slope of the given line is 3/2.
Parallel lines share the same slope, the equation of the line parallel to the given one that passes through point (-6,-11) will also have the slope 3/2. We stick this and our point into the point-slope form of a line (y - y1 = m(x - x1)) to get: y + 11 = 3/2(x + 6). Simplifying, we get y = (3/2)x - 9 which is the equation of the line parallel to the given equation that passes through the point (-6,-11).
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Chloe is a pharmacist and wants to know the
height of a medicine bottle received from a
supplier. The supplier informed her that the
radius of the medicine bottle is one-fourth its
height. Chloe knows that the medicine bottle
has a volume of V cubic inches.
Which of the following functions would best model the situation above?
O
cube root
O
square root
O
exponential
O
step
The given situation would be a best model of cube root.
Solution:
Generally, medicine bottles will be cylindrical in shape. Since the shape of the bottle is not given we can assume that the bottle is in cylindrical shape.
Given information:
Radius of the bottle (r) = one fourth of its height (h)
[tex]\Rightarrow r=\frac{1}{4}\times h[/tex]
Volume of the bottle = V cubic inches
The formula of the volume of a cylinder is as follows,
[tex]\Rightarrow V=\pi r^{2} h[/tex]
This can be re-written as [tex]h=\frac{V}{\pi r^{2}}[/tex] as we do not know the height.
On plugging-in the given values we get,
[tex]\Rightarrow h=\frac{V}{\pi \times(\frac{h}{4})^{2}}\rightarrow \frac{V}{\pi \times\frac{h^2}{16}}\rightarrow \frac{16V}{\pi\times h^2}[/tex]
On solving we get,
[tex]\Rightarrow h\times h^2 = \frac{V}{\pi}[/tex]
[tex]\Rightarrow h^3 = \frac{V}{\pi}[/tex]
On taking the cube root on both sides we get,
[tex]\Rightarrow h=\sqrt[3]{\frac{V}{\pi}}[/tex]
Therefore, cube root would be the best model of the given solution.
Combine like terms to simplify the expression: 9 + 3b − 1 + 7b − 2 = ______ 9 − 10b 6 + 10b 8 + 10b 16b 9 + 10b
Answer:6 +10b
Step-by-step explanation:
Like terms 9-1-2 =6 and 3b + 7b = 10b
How many cubic meters of material are there in a conical pile of dirt that has radius 11 meters and height 6 meters? Use 3.14 for pi.
The volume of a conical pile of dirt with an 11-meter radius and a 6-meter height is approximately 754.24 cubic meters.
The question is asking for help in calculating the volume of a conical pile of dirt.
The formula for finding the volume of a cone is [tex]V = (1/3) \pi r^2h[/tex], where V is the volume, r is the radius, and h is the height of the cone.
Substituting the given values, the radius r is 11 meters, the height h is 6 meters, and using 3.14 for
π, the calculation would be -
V = (1/3) * 3.14 * 112 * 6.
To find the volume: V = (1/3) * 3.14 * 121 * 6
= 3.14 * 40.333333 * 6
= 754.24 cubic meters.
So, there are approximately 754.24 cubic meters of material in the conical pile of dirt.
The measure of an angle is 63.7°. What is the measure of its supplementary angle?
Answer:
116.3
Step-by-step explanation:
Supplementary angles add to 180
One angle is 63.7, the other is x
63.7+x = 180
Subtract 63.7 from each side
63.7-63.7+x = 180-63.7
x = 116.3