Answers
Related Questions
does anyone know the answer?
Answers
Answer:
£0.60
Step-by-step explanation:
If each pack costs £1.59 and Nadia orders 15 packs,
then the total order before discount = 1.59 x 15 = £23.85
From the table given, we can see that for an order of £23.85 a 2.5% discount will be applied.
Divide £23.85 by 100 to get 1%: £23.85 ÷ 100 = £0.2385
Now multiply by 2.5 to get 2.5%: £0.2385 × 2.5 = £0.59625 = £0.60
Alternatively, the calculation in one expression is:
(1.59 × 15) × 0.025 = 0.59625
The circular floor of a teepee has a diameter of 9 yards. What is the circumference of the floor?
30 points pls show ur work thank u so much!!! :)
Answers
Answer:
28.26
Step-by-step explanation:
[tex]3.14\times9[/tex]
Calculate the product or quotient
[tex]28.26[/tex]
I hope this helps you
:)
Can someone PLS HELP
Answers
Answer: 72 square feet
Step-by-step explanation: just multiply 8* 7 = 56 then 8*2 = 16 and add = 72
Consider the following. (A computer algebra system is recommended.) y'' + 3y' = 2t4 + t2e−3t + sin 3t (a) Determine a suitable form for Y(t) if the method of undetermined coefficients is to be used. Y(t) = t(A0t4 + A1t3 + A2t2 + A3t + A4) + (B0t2 + B1t + B2)e−t + C sin 3t + D cos 3t Y(t) = t(A1t3 + A2t2 + A3t + A4) + t(B0t3 + B1t2 + B2t + B3)e−3t + C sin 3t + D cos 3t Y(t) = (A0t4 + A1t3 + A2t2 + A3t + A4) + t(B0t2 + B1t + B2)e−3t + C sin t + D cos t Y(t) = t(A0t4 + A1t3 + A2t2 + A3t + A4) + t(B1t + B2)e−3t + C sin 3t + D cos 3t Y(t) = t(A0t4 + A1t3 + A2t2 + A3t + A4) + t(B0t2 + B1t + B2)e−3t + C sin 3t + D cos 3t (b) Use a computer algebra system to find a particular solution of the given equation. Y(t) =
Answers
First look for the fundamental solutions by solving the homogeneous version of the ODE:
[tex]y''+3y'=0[/tex]
The characteristic equation is
[tex]r^2+3r=r(r+3)=0[/tex]
with roots [tex]r=0[/tex] and [tex]r=-3[/tex], giving the two solutions [tex]C_1[/tex] and [tex]C_2e^{-3t}[/tex].
For the non-homogeneous version, you can exploit the superposition principle and consider one term from the right side at a time.
[tex]y''+3y'=2t^4[/tex]
Assume the ansatz solution,
[tex]{y_p}=at^5+bt^4+ct^3+dt^2+et[/tex]
[tex]\implies {y_p}'=5at^4+4bt^3+3ct^2+2dt+e[/tex]
[tex]\implies {y_p}''=20at^3+12bt^2+6ct+2d[/tex]
(You could include a constant term f here, but it would get absorbed by the first solution [tex]C_1[/tex] anyway.)
Substitute these into the ODE:
[tex](20at^3+12bt^2+6ct+2d)+3(5at^4+4bt^3+3ct^2+2dt+e)=2t^4[/tex]
[tex]15at^4+(20a+12b)t^3+(12b+9c)t^2+(6c+6d)t+(2d+e)=2t^4[/tex]
[tex]\implies\begin{cases}15a=2\\20a+12b=0\\12b+9c=0\\6c+6d=0\\2d+e=0\end{cases}\implies a=\dfrac2{15},b=-\dfrac29,c=\dfrac8{27},d=-\dfrac8{27},e=\dfrac{16}{81}[/tex]
[tex]y''+3y'=t^2e^{-3t}[/tex]
[tex]e^{-3t}[/tex] is already accounted for, so assume an ansatz of the form
[tex]y_p=(at^3+bt^2+ct)e^{-3t}[/tex]
[tex]\implies {y_p}'=(-3at^3+(3a-3b)t^2+(2b-3c)t+c)e^{-3t}[/tex]
[tex]\implies {y_p}''=(9at^3+(9b-18a)t^2+(9c-12b+6a)t+2b-6c)e^{-3t}[/tex]
Substitute into the ODE:
[tex](9at^3+(9b-18a)t^2+(9c-12b+6a)t+2b-6c)e^{-3t}+3(-3at^3+(3a-3b)t^2+(2b-3c)t+c)e^{-3t}=t^2e^{-3t}[/tex]
[tex]9at^3+(9b-18a)t^2+(9c-12b+6a)t+2b-6c-9at^3+(9a-9b)t^2+(6b-9c)t+3c=t^2[/tex]
[tex]-9at^2+(6a-6b)t+2b-3c=t^2[/tex]
[tex]\implies\begin{cases}-9a=1\\6a-6b=0\\2b-3c=0\end{cases}\implies a=-\dfrac19,b=-\dfrac19,c=-\dfrac2{27}[/tex]
[tex]y''+3y'=\sin(3t)[/tex]
Assume an ansatz solution
[tex]y_p=a\sin(3t)+b\cos(3t)[/tex]
[tex]\implies {y_p}'=3a\cos(3t)-3b\sin(3t)[/tex]
[tex]\implies {y_p}''=-9a\sin(3t)-9b\cos(3t)[/tex]
Substitute into the ODE:
[tex](-9a\sin(3t)-9b\cos(3t))+3(3a\cos(3t)-3b\sin(3t))=\sin(3t)[/tex]
[tex](-9a-9b)\sin(3t)+(9a-9b)\cos(3t)=\sin(3t)[/tex]
[tex]\implies\begin{cases}-9a-9b=1\\9a-9b=0\end{cases}\implies a=-\dfrac1{18},b=-\dfrac1{18}[/tex]
So, the general solution of the original ODE is
[tex]y(t)=\dfrac{54t^5 - 90t^4 + 120t^3 - 120t^2 + 80t}{405}\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,-\dfrac{3t^3+3t^2+2t}{27}e^{-3t}-\dfrac{\sin(3t)+\cos(3t)}{18}[/tex]
HELPPP PLS
Find the value of the variable.
Answers
Answer:
y = 90[tex]\sqrt{2}[/tex]
Step-by-step explanation:
using the sine ratio in the right triangle and the exact value
sin45° = [tex]\frac{1}{\sqrt{2} }[/tex] , then using the 45° angle on the lower left
sin45° = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{90}{y}[/tex] = [tex]\frac{1}{\sqrt{2} }[/tex] ( cross- multiply )
y = 90[tex]\sqrt{2}[/tex]
The average time it takes a group of students to complete a certain statistics exam is 55.6 minutes. The standard deviation is 9 minutes. Assume the exam completion times are normally distributed. If 40 randomly selected students take the exam, what is the probability that the mean completion time for the group will be less than 45 minutes?
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What is the value of 17^0
Answers
Answer:
1
Step-by-step explanation:
Anything to the exponent of 0 is 1.
Please answer this question I don't have time please.
Answers
Answer:
The juice bar can sell 3 more cups of the passion juice than the berry juice (last one)
Step-by-step explanation:
Passion: 768/16=48
Berry: 810/18=45
passion can fill 48 cups while berry can fill 45 cups, so passion fills +3
:)
Explanation:
wo mechanics worked on a car. The first mechanic charged $95 per hour, and the second mechanic charged $75per hour. The mechanics worked for a combined total of 20 hours, and together they charged a total of $1800. How long did each mechanic work?
Answers
Answer:
he first one worked 15 hours, the second one worked 5 hours.
Step-by-step explanation:
First mechanic worked x hours, then second one worked 20 - x hours
First one charged $95*x, second one charged $75*(20-x)
Total charge = 95x + 75(20 - x) = 1800
95x + 1500 - 75x = 1800
20x = 300
x = 15, 20 - x = 5
So the first one worked 15 hours, the second one worked 5 hours.
write and solve and equation to find ABE
Answers
Answer:
77
Step-by-step explanation:
<DBE and <ABE are supplementary angles so their sum is equal to 180
<DBE is given as 103
103 + <ABE = 180 subtract 103 from both sides
<ABE = 77
Could you please help me on this
Answers
Answer:
-x^2 +10x + 7
[tex]-x^2 +10x + 7[/tex]
Step-by-step explanation:
its the gray shaded area [(x+1)*(x+7)] minus the white area [(x-1)*(2x)]
AKA: [(x+1)*(x+7)] - [(x-1)*(2x)]
so first you foil to get both areas
gray region: (x+1)*(x+7) = x^2 + 8x + 7
white region: (x-1)*(2x) = 2x^2 - 2x
and then you subtract the white from the gray
[tex](x^2 + 8x + 7) - (2x^2 - 2x)[/tex]
-x^2 +10x + 7
In 2017, it was estimated that the average amount spent on winter holiday gifts in the United States was $906. Based on the estimate from the Waldfogel study, how much of this would be deadweight loss
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Based on the estimate from the Waldfogel study, 10[tex]\%[/tex] of this would be a deadweight loss, i.e., [tex]\[/tex]90.6 would be the deadweight loss.
Deadweight loss means the economic inefficiency that takes place when the allotment of resources in a market isn't at the optimal position.
The study suggested that the average recipient's valuation of the gift received was approximately 90[tex]\%[/tex] of the actual purchase price of the gift.
This means that 10[tex]\%[/tex] of the value of the gift gets lost in between.
This loss of 10[tex]\%[/tex] in value constitutes the deadweight loss.
The average amount spent on gifts = $906
Percentage loss in value = 10[tex]\%[/tex] or 0.10
Calculation of the deadweight loss,
DWL = Average amount spent on gifts × Percentage loss in value
DWL = [tex]\[/tex]906 × 0.10
Thus, the deadweight loss would be [tex]\[/tex]90.6.
Learn more about a deadweight loss here:
https://brainly.com/question/32082652
#SPJ12
I need help with this math question
Answers
Answer:
-1/4x+3/4
or
-0.25x+0.75
Step-by-step explanation:
g(x) = mx + b
m = slope
b = initial value
m = -1/4
b = 3/4
g(x) = -1/4x+3/4
Hope this helped, let me know if you need more help!
What is the value of x in this triangle?
Enter your answer as a decimal in the box. Round only your final
answer to the nearest hundredth. 5, 20, x
Answers
Answer:
[tex]\sf x= 14.04^{\circ \:}[/tex]
using tan rule:
[tex]\sf tan(x)= \dfrac{opposite}{adjacent}[/tex]
solve:
[tex]\rightarrow \sf tan(x)= \dfrac{5}{20}[/tex]
[tex]\rightarrow \sf x= tan^{-1}(\dfrac{5}{20})[/tex]
[tex]\rightarrow \sf x= 14.04^{\circ \:}[/tex]
Answer:
x = 14.04° (nearest hundredth)
Step-by-step explanation:
Use the tan trig ratio:
[tex]\mathsf{\tan(\theta)=\dfrac{O}{A}}[/tex]
where:
[tex]\theta[/tex] is the angleO is the side opposite the angleA is the side adjacent the angleGiven:
[tex]\theta=x[/tex]O = 5A = 20[tex]\implies \mathsf{\tan(x)=\dfrac{5}{20}}[/tex]
[tex]\implies \mathsf{x=\arctan\left(\dfrac{5}{20}\right)}[/tex]
[tex]\implies \mathsf{x=14.04\textdegree \ (nearest \ hundredth)}[/tex]
A very large gardening business grows rose bushes for sale to garden stores around the world. The most popular colors are red, pink, and white. The business decides on 50% red roses, 30% pink, and 20% white. A gardener orders 10 rose bushes selected randomly from a huge field. Her primary interest is in pink roses. A good model for the number of bushes with pink roses is given by the binomial distribution. Probability calculations are quicker when using the Normal approximation to the binomial distribution. Which of the following is false
a. The approximation requires np 10 and n(1 â p) 10.
b. The sample size here is too small to use the Normal approximation to the binomial.
c. The approximation requires np 30.
d. The Normal approximation works better if the success probability p is close to p = 0.5.
Answers
Complete options are;
a. The approximation requires np > 10 and n(1 - p) > 10.
b. The sample size here is too small to use the Normal approximation to the binomial.
c. The approximation requires np > 30.
d. The Normal approximation works better if the success probability p is close to p = 0.5.
Answer:
Option C is false
Step-by-step explanation:
Looking at the options,
In normal approximation to the binomial,
n is the sample size,
p is the given probability.
q = 1 - p
Now, one of the conditions for using normal approximation to the binomial is that; np and nq or n(1 - p) must be greater than 10.
This means that option A is true because we require np or n(1 - p) to be greater than 10.
From Central limit theorem, the sample size needs to be more than 30 for us to use normal approximation. Our sample is 10. Thus, option B is true.
The approximation doesn't require np > 30. Rather it's the sample size that needs to be more than 30. Thus, option C is false.
Generally, when the value of p in a binomial is close to 0.5, the normal approximations will work better than when the value of p is closer to either 0 or 1. The reason is that: for p = 0.5, the binomial distribution will be symmetrical. Thus, option D is correct.
1 Suppose that $61,000 is invested at 55% interest, compounded quarterly. a) Find the function for the amount to which the investment grows after t years b) Find the amount of money in the account at t=0.3.7, and 10 years. 12 %
a) The function for the amount to which the investment grows after t years is A(t) = (Simplify your answer. Type an expression using t as the variable )
Answers
Answer:
i think its a
Step-by-step explanation:
2/5×6/7= in simplist or mixed form
Answers
Answer:
2/5x6/7 = 12/35
Step-by-step explanation:
when we multiply fractions we multiply the denominators together and the numerators as well, so 2 x 6 = 12. and 5 x 7 =35
12/35
At Ariel's family reunion, Ariel hands out watermelon for the annual seed-spitting contest.
She gives a watermelon slice to each kid at the reunion. She also gives a slice to 40 adults.
Ariel hands out 90 watermelon slices in all.
Which equation can you use to find how many kids k are at the reunion?
k
90
K-40 = 90
k + 40 = 90
40k = 90
40
Solve this equation for k to find how many kids are at the reunion.
kids
Answers
Find the length of cable 1 in the diagram below
Answers
Answer:
cable 1 ≈ 54.63 ft
Step-by-step explanation:
using Pythagoras' identity in the right triangle having cable 1 as its hypotenuse.
let cable 1 be x , then
x² = 22² + 50² = 484 + 2500 = 2984 ( take square root of both sides )
x = [tex]\sqrt{2984}[/tex] ≈ 54.63 ft ( to 2 dec. places )
Arc length and sector area question
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Answer:
<aob=1/2(can + ab)
<aob=1/2(25+46)
<aob=1/2(71)
<aob=35.5
Find the equation of a line that passes through the point (0,4) and has a gradient of 2.
Leave your answer in the form
y
=
m
x
+
c
Answers
Answer:
[tex]y = \frac{x}{2} + 4[/tex]
Help me with this please I gave you 30 points
Answers
To be a reflection it needs to be on the opposite side.
-two to 1 is where it’s supposed to be.
Hope this helps out!
- Bambi
Answer:
a reflection over the vertical axis, the coordinates would be (-2,5) the first number being the horizontal, second vertical
The total distance an ant crawls varies directly with the time in seconds. The ant crawls a total distance of 160 centimeters in 20 seconds.
What is the time in seconds the ant crawls when the total distance is 216 centimeters?
8 s
11 s
25 s
27 s
Answers
Answer:
27sStep-by-step explanation:
Given data
total distance=160 cm
time taken =20seconds
We know that speed =distance/time
So let us solve for the speed of the ant
speed=160/20
speed= 8cm/s
Also when the distance is 216,and the ant uses the same speed,it will take the ant
time=distance/speed
time=216/8
time= 27seconds
The sum of the measures of the three interior angles of any triangle is always 180°. The unmarked angles of the triangle below total 150°. angle A triangle.gif What is the measure of an angle that would be complementary to ∠ A ? A. 30° B. 60° C. 90° D. 150°
Answers
As rest angles have sum 150°
Using angle sum property
x+150=180x=30°Now
Complementary angles have sum 90°
So the complementary angle is 90-30=60°
Option B
The order of the first term more than 100 in the sequence (Tn)=(2+5n) is ……
Answers
Answer:
20
Step-by-step explanation:
T19 = 97
T20 = 102
The 20th term is the first term more than 100.
__
You can find the value of n from ...
2 +5n > 100
5n > 98
n > 19.6
The 20th term is the first term more than 100.
Which table of ordered pairs represents a proportional relationship?
Whoever answers correctly and first-will be marked brainiest :)
Answers
area of a trapezoid 6 mm 2 mm 4 mm
Answers
Answer:48 mm
Step-by-step explanation:
6 x 2 x 4= 48mm
The standard unit of measurement for length is the:
mile
centimeter
meter
yard
Answers
Answer:
meter (m) is the standard unit measurement for length .
Answer:
it is meter just to let yall know
Step-by-step explanation:
Lucy invested for 15 years at 2.8%, compounded annually and ended with an account balance of $2250. What was her initial deposit?
Answers
Answer:1244
Step-by-step explanation:
Answer:
Step-by-step explanation:
Use the formula for calculating compound interest PN=P0(1+rk)Nk where N is the unknown, PN=2250, k=1, N=15, and r=0.028. Substitute the values into the formula and simplify.
2250=P(1+0.0281)1⋅15
2250=P(1.028)15
2250=P(1.5132...)
1486.91=P
Rounded to the nearest dollar, Lucy's initial deposit was $1487.
Please answer quickly
The inequality below is equivalent to which of the following? 7−23x 9 B.x>−35 C.x<9 D.x<−35
WORTH ALL MY POINTS
If answers right i will give Brainliest
Answers
Answer:
?
Step-by-step explanation: