Answers
Answer:
Step-by-step explanation:
Related Questions
if BC=5x-9 and AB =2x+21 solve for x
Answers
Answer:
1st one x = BC/5 +9/5
2nd one x = AB/2 - 21/2
Step-by-step explanation:
Solve 2/5x-1/5>1 x>? pls help I'm timed!!
Answers
Answer:
[tex]2/5x-1/5>1 x>[/tex]
= [tex]\:x<-\frac{1}{3}\:[/tex]
It takes the window washing crew 15 minutes to wash 18 windows. Based on this, how long does it take them to wash all 24,348 windows?
Answers
Answer:
Step-by-step explanation:
34321.2 min
Step-by-step explanation:
The Burj Khalifa has in total 28601 windows. On the other hand, we are told the window-washing crew can wash 15 windows in 18 minutes. So, we can use the Rule of three to solve this problem:
If:
15 windows ---- 18 min
28601 windows ---- ?
Then:
? = (28601windows)(18min)/15windows
? = 34321.2min
To wash all 24,348 windows the washing crew needs 20290 minutes.
What is unitary method ?Unitary method a tool for first determining the value of a single unit from there we can find values of any given unit.If we multiply the value of single unit with the give data we can obtain our result.
According to the given question It takes the window washing crew 15 minutes to wash 18 windows.
∴ To wash 1 window by the window washing crew is
= 15/18 minutes.
= 5/6 minutes.
So, To wash 24348 windows the time required is
= (5/6)×24348 minutes.
= 20290 minutes.
learn more about unitary method here :
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The temperature of a cup of coffee varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T minus A, where T is the temperature of the coffee, A is the room temperature, and k is a positive constant. If the coffee cools from 100°C to 90°C in 1 minute at a room temperature of 25°C, find the temperature, to the nearest degree Celsius of the coffee after 4 minutes.
74
67
60
42
Answers
Answer:
67
Step-by-step explanation:
A = 25, T(0) = 100, T(1) = 90, find T(4)
dT/dt = -k(T - A)
d(T - A)/dt = -k(T - A)
d(T - A)/(T - A) = -k dt
ln(T - A) = lnC - kt
[tex]T(t) -A=Ce^{-kt}\\T(t) = A + Ce^{-kt} = 25 + Ce^{-kt}\\T(0) = 25 + C = 100\\C=75[/tex]
[tex]T(t) = 25 + 75e^{-kt}\\T(1) = 25 + 75e^{-k} = 90\\75e^{-k} = 65\\e^{-k} = \frac{65}{75}, k = ln\frac{75}{65} = 0.1431\\T(t) = 25+75e^{-0.1431t}\\T(4) = 25+75e^{-0.1431\times4} = 67.3[/tex]
langston has 45 greeting cards.he gives 18 of the card to his frinds. What percentil of this greeting card does he give to his frinds.?
Answers
Answer:
40%
Step-by-step explanation:
Convert the fraction to a decimal, then multiply by 100.
A coach buys 15 basketball uniforms for $546.
Which relationship relates the price to uniforms. Circle
all that apply.
a. 1:15
b. 15 to 546
c. 36.4071
d. 1 to 36.40
e.546 to 15
Answers
Answer:
d
Step-by-step explanation:
Multiply $81$ by the sum of $2$ and $3$.
Answers
Steps:
Note, S = Sum
(2 + 3) * 81= S
Starts with the parenthesis.
2 + 3 = 5
5 * 81 = 405
Please help (21 points)
Answers
Answer:
|a^13| / 10
Step-by-step explanation:
√(0.01)=1/10
√(x^26)= |a^13|
[Answer]= |a^13| / 10
Please rate 5 stars if correct!!!
I hope this helps!!!
The Bank of France sells U.S. The bank of France sells U.S dollars ($) at a rate of ($1.40)/(€1) and buys U.S. dollars
at a rate of ($1.80)/(€1). At the beginning of a trip, Sandra exchanged $420 to get
€233.33. At the end of the trip, she is left with €36, so she exchanges the €36 back to
U.S. dollars. How many U.S. dollars will Sandra receive in exchange?
Answers
Answer:
Sandra will receive 50.4$
Step-by-step explanation:
1.40 x 36 = 50.4
Hope this helps! Please let me know if you need more help or think my answer is incorrect. Brainliest would be MUCH appreciated. Have a wonderful day!
Sandra will receive $50.4 in exchange of her currency.
What is exchange rate?
" Exchange rate is the process of changing currency of one country at the rate of other country."
According to the question,
Bank of France sells U.S dollars ($) at a exchange rate of = ($1.40)/(€1)
Bank of France buys U.S. dollars at a exchange rate of = ($1.80)/(€1).
Sandra needs to exchange currency back to U.S. dollars. = €36
U.S. dollars received by Sandra in exchange currency = $ ( 1.40 × 36)
= $ 50.4
Hence, Sandra will receive $50.4 in exchange of her currency.
Learn more about exchange rate here
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Find the vertex, the equation of the axis of symmetry, and the y-intercept of each function.
7) y = -2x-4x+5
Answers
Answer:
Vertex: (-1,7)
Equation of the axis of symmetry: x = -1
y-intercept: (0, 5)
Step-by-step explanation:
I will assume that the function is quadratic where it is supposed to be y = -2x² - 4x + 5.
The standard form of quadratic functions can be written as
y = ax² + bx + c
To find the vertex of this function, we need the axis of symmetry (aos).
aos = - b/2a
= - ( -4/-4)
= - 1
Axis of symmetry: x = -1
For the vertex, simply plug in the aos into the function.
f(x) = -2x² - 4x + 5
f(-1) = -2(-1)² -4(-1) + 5
= -2 + 4 + 5
= 7
Vertex: (-1, 7)
Now the y-intercept is the easiest part, since the function is written in standard form. When it is, the y-intercept is always (0, c), which in this case is (0, 5).
y-intercept: (0,5)
Researchers for a local marketing firm have a sample size of 24 , and they are using the Student's t-distribution. What are the degrees of freedom and how would they notate this distribution
Answers
Answer:
df=23, T∼t23
Step-by-step explanation:
The degrees of freedom would be calculated as df = n-1 = 24-1 = 23, and the distribution notation would be T∼t23 from the degrees of freedom.
its 2.2 km from charlie's house to the nearest mailbox. how far is it in meters
Answers
Answer:
2200
Step-by-step explanation:
Kilo means 1000, so kilometers are 1000 meters, therefore 2.2 kilometers = 2200 meters.
Answer: 2,200
Step-by-step explanation:
Multiply 2.2 with 1,000 because the km to meters conversion is 1,000.
Reflect the given triangle over the line y= -x
[0 7 -1]
[0 -3 -4]
Answers
Answer:
9514 1404 393
Answer:
[ 0 -3 4 ]
[ 0 -7 1 ]
Step-by-step explanation:
Reflection over the line y=-x swaps the coefficients and negates both of them.
(x, y) ⇒ (-y, -x)
Dont take my word for it ...
Answer: 0 3 4
0 -7 1
Step-by-step explanation:
Look at image, I need help as soon as possible!
Answers
Answer:
I predict 1,008 people may have cookies as their favorite snack.
Step-by-step explanation:
27 + 21 + 63 + 64 = 175
63 x
---- = -------
175 2800
Multiply both sides by 16
63 x 16 = 1,008
What is P44 ? 16 24 4 1
Answers
Answer:
Page 44? you mean
Step-by-step explanation:
Answer:
24
Step-by-step explanation:
i just took the test
Find f(-2) for f(x)=-4x-7
Answers
Explanation:
f(-2) = -4(-2) - 7
f(-2) = 8 - 7
f(-2) = 1
con el azucar de un saco enpaco bolsas de 250 cada una.¿cuantas bolsas en paco
Answers
Esta pregunta esta incompleta
Pregunta completa
El señor Juan tiene una tienda de abarrotes y sus ventas son al mayoreo y al menudeo. La semana pasada recibió dos toneladas de azúcar en 40 sacos de 50 kg cada uno.
Con el azúcar de un saco empacó bolsas de 250 cada una.¿cuantas bolsas en paco
Answer:
200 bolsas.
Step-by-step explanation:
Se nos dice en la pregunta,
La semana pasada recibió dos toneladas de azúcar en 40 bolsas de 50 kg cada una.
Esto significa
1 bolsa = 50 kg de azúcar.
1 kg = 1000 gramos
50 kg = 50 × 1000 gramos
= 50000 gramos
Por tanto, 1 bolsa contiene = 50000 gramos de azúcar.
A partir de la pregunta anterior, se nos pregunta cuántas bolsas de azúcar obtendría si cada bolsa contuviera 250 gramos.
Por lo tanto:
50000/250 gramos
= 200 bolsas.
Por lo tanto, obtendría 200 bolsas.
By your cell phone contract, you pay a monthly fee plus some money for each minute you use the phone during the month. In one month, you spent 290 minutes on the phone, and paid $22.25. In another month, you spent 360 minutes on the phone, and paid $24.00.
Let x be the number of minutes you talk over the phone in a month, and let y be your cell phone bill for that month. Use a linear equation to model your monthly bill based on the number of minutes you talk over the phone.
a. This linear model's slope-intercept equation is_____________.
b. If you spent 140 minutes over the phone in a month, you would pay________________ .
c. If in a month, you paid $26.25 of cell phone bill, you must have spent ______________minutes on the phone in that month.
Answers
Answer:
(a) [tex]y = 0.025x+15[/tex]
(b) 18.5 minutes
(c) 450.4 minutes
Step-by-step explanation:
Given
[tex]290\ minutes = \$22.25[/tex]
[tex]360\ minutes = \$24.00[/tex]
Solving (a): Determine the linear equation
First, we need to calculate the slope (m)
[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
Where
[tex](x_1,y_1) = (290,22.25)[/tex]
[tex](x_2,y_2) = (360,24.00)[/tex]
So, we have:
[tex]m = \frac{24.00 - 22.25}{360 - 290}[/tex]
[tex]m = \frac{1.75}{70}[/tex]
Multiply through by 100
[tex]m = \frac{1.75 * 100}{70 * 100}[/tex]
[tex]m = \frac{175}{7000}[/tex]
Next, is to calculate the equation of the line using:
[tex]y - y_1 = m(x - x_1)[/tex]
Recall that:
[tex](x_1,y_1) = (290,22.25)[/tex]
[tex]m = \frac{175}{7000}[/tex]
[tex]y - 22.25 = \frac{175}{7000}(x - 290)[/tex]
[tex]y - 22.25 = \frac{175x}{7000} - \frac{175}{7000} * 290[/tex]
[tex]y - 22.25 = \frac{175x}{7000} - \frac{50750}{7000}[/tex]
Add 22.25 to both sides
[tex]y = \frac{175x}{7000} - \frac{5075}{700} + 22.25[/tex]
[tex]y = \frac{175x}{7000} + \frac{-5075 + 15575}{700}[/tex]
[tex]y = \frac{175x}{7000} + \frac{10500}{700}[/tex]
[tex]y = 0.025x+15[/tex]
(b) Solve for y when x = 140
[tex]y = 0.025x+15[/tex]
Substitute 140 for x
[tex]y = 0.025 * 140 + 15[/tex]
[tex]y = 3.5 + 15[/tex]
[tex]y = 18.5[/tex]
(c) Solve for x when y = 26.25
[tex]y = 0.025x+15[/tex]
Substitute 26.25 for y
[tex]26.25 = 0.025x + 15[/tex]
Solve for 0.025x
[tex]0.025x = 26.26 - 15[/tex]
[tex]0.025x = 11.26[/tex]
Solve for x
[tex]x = 11.26/0.025[/tex]
[tex]x = 450.4\ minutes[/tex]
What are the effects of low‑fat food labels on food consumption? Do people eat more of a snack food when the food is labeled as low‑fat? The answer may depend both on whether the snack food is labeled low‑fat and whether the label includes serving‑size information. An experiment investigated this question using university staff, graduate students, and undergraduate students at a large university as subjects. Subjects were asked to evaluate a pilot episode for an upcoming TV show in a theater on campus and were given a cold 24‑ounce bottle of water and a bag of granola from a respected campus restaurant called The Spice Box. They were told to enjoy as much or as little of the granola as they wanted. Depending on the condition randomly assigned to the subjects, the granola was labeled as either "Regular Rocky Mountain Granola" or "Low‑Fat Rocky Mountain Granola." Below this, the label indicated "Contains 1 Serving" or "Contains 2 Servings" or it provided no serving‑size information. Twenty subjects were assigned to each treatment, and their granola bags were weighed at the end of the session to determine how much granola was eaten. (a) How many factors and treatments are there?
Answers
Answer:
There are six factors and two treatments.
Step-by-step explanation:
We can make this conclusion because treatments in experimentation refer to something that researchers use or administer to their subjects, while factors simply refer to the category of treatments; in other words, the number of various types of treatments.
Remember, the researchers stated that "the condition [treatments] randomly assigned to the subjects", is that the granola was labeled as either "Regular Rocky Mountain Granola" or "Low‑Fat Rocky Mountain Granola," which shows that the treatments are two (Rocky Mountain Granola and Low‑Fat Rocky Mountain Granola). Summing the factors (various types/categories of treatments) gives us six factors.
what is the mode of the following data 1,2,1,1,3,2,2,2
Answers
Answer:
2
Step-by-step explanation:
the mode is the one that appears the most, most common one
Answer:
2
Step-by-step explanation:
mode means the most common number in the set.
I hope this helps....
Which relationships describe angles 1 and 2?
Select each correct answer.
vertical angles
complementary angles
adjacent angles
supplementary angles
Answers
Answer:
Supplementary angles
Step-by-step explanation:
Those kind of angles are next to each other.
Answer:
adjacent and complimentary angles
Step-by-step explanation:
what I got
Complete the pattern below in the list of numbers. 5, 15, 9, 19, 13,
Answers
Answer:
23
Step-by-step explanation:
5+10=15
15-6=9
9+10=19
19-6=13
So, we should do:
13+10=23
(−2/3)(1/6) I need to know how to do fraction accurately
Answers
Answer && Step-by-step explanation:
Simple.
- 2/3 1/6 line up together, we already know end result is neg since only one neg sign
2*1 = 2
6*3 == 18
ans == -2/18
Three times a number decreased by 9
Answers
Answer:
I do not know what you want, but the equation is 3x - 9
Step-by-step explanation:
Answer:
3a - 9
Step-by-step explanation:
Three times a number decreased by 9:
3a - 9
What two numbers has a sum of 18 and a difference of 8?
Answers
13 and 5
let's say the two numbers are x and y
x+y = 18
x-y= 8
x+y+x-y= 18+8
18+8 = 26
2x = 26
x = 13
18-13 = 5
y = 5
Which of the following is the equation of a nonlinear function?
A. y = 25
B. y = x −
C. y = 10x
D. y = x 2 + 15
Answers
Answer:
A
Step-by-step explanation:
y = 25 is a zero slope function and is also not in the form of y=mx+b, unlike the others.
write the EQ of circle i find center and radius given
x² + y²-4x+12y =-4
Answers
Answer:
CENTER :(2,-6)
RADIUS: 6
FOLLOW ME❤️✨FOR M0RE QUESTION
THAT YOU WHAT ME TO ANSWER
Step-by-step explanation:
Hey there!
Given;
[tex] {x}^{2} + {y}^{2} - 4x + 12y = \: - 4[/tex]
Now, Try to make it a perfect square.
[tex] {x}^{2} - 4x + {(2)}^{2} - ( { 2)}^{2} + {y}^{2} + 12y + ( {6)}^{2} - ( {6)}^{2} = - 4 [/tex]
Make perfect square and shift -(2)^2 and -(6)^2 on right side.
[tex]( {x - 2)}^{2} ( {y + 6)}^{2} = - 4 + 40[/tex]
[tex]( {x - 2)}^{2} ( {y + 6)}^{2} = 36[/tex]
Comparing the equation with (x-h)^2(y-h)^2= r^2.
We get,
Centre (h,k)= (2,-6)
Radius (r) = 6
Hope it helps...
Solve the literal equation for E.
LaTeX: G=\frac{2b^2E}{F}
Answers
Answer:
[tex]E=\dfrac{FG}{2b^2}[/tex]
Step-by-step explanation:
Multiply by the inverse of the coefficient of E.
[tex]G=\dfrac{2b^2E}{F}\\\\\boxed{E=\dfrac{FG}{2b^2}}[/tex]
could someone help me?
Answers
Answer:
∠B = 65°
Step-by-step explanation:
Complementary angles are angles that add up to 90°. So if there is 90 total degrees - 25 degrees of ∠A, then ∠B = 65°.
26. Which of the following DO NOT illustrates independent events?
A. Landing on heads after tossing a coin and rolling a 5 on a single 6-sided die.
B. Choosing a marble from a jar and landing on heads after tossing a coin.
C. Rolling a die and getting an even number.
D. Choosing a 3 from a deck of cards, replacing it and then choosing an ace as the second card.
Answers
Answer:
C. obtaining an even number when rolling a die
Step-by-step explanation:
Two events are independent when neither depends on the other. That is, the probability that one occurs is not affected by the occurrence, or lack of occurrence, of the other event. Their joint probability is the product of their individual probabilities.
__
Among the answer choices, all describe two independent events except C. Choice C describes one (1) event, so does NOT illustrate independent events.