Answers
Answer:
I don't know the answer but ik how to do it
Step-by-step explanation:
you find how many metres there are in 48km and how many seconds there are in a hour then you divided and times it by 3 and thats the speed of the cat in 3 seconds
Related Questions
-6x+5y=1
6x+4y=-10
solve using system of equation elimination
Answers
Answer:
[tex]x=-1,\:y=-1[/tex]
Step-by-step explanation:
[tex]\begin{bmatrix}-6x+5y=1\\ 6x+4y=-10\end{bmatrix}[/tex]
[tex]\mathrm{Add\:the\:equations}[/tex]
[tex]6x+4y=-10[/tex]
[tex]+[/tex]
[tex]\underline{-6x+5y=1}[/tex]
[tex]9y=-9[/tex]
[tex]\begin{bmatrix}-6x+5y=1\\ 9y=-9\end{bmatrix}[/tex]
Solve 9y=-9 for y: y=-1
[tex]\mathrm{For\:}-6x+5y=1\mathrm{\:plug\:in\:}y=-1[/tex]
Solve -6x+5(-1)=1 for x: x=-1
[tex]\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}[/tex]
[tex]x=-1,\:y=-1[/tex]
Lena starts a spelling test at 12:15 P.M. The test is 35 minutes long. After the spelling test, Lena has art class for 1 hour. What time does Lena's art class end?
Answers
Answer:
1:50 P.M
Step-by-step explanation:
12:15+35 = 12:50
1 hour = 60 minutes
60 + 12:50 = 1:50
WILL GIVE BRAINLIEST Mr. and Mrs. Bailey hope to send their son to college in eleven years. How much money should they invest now at an interest rate of 9% per year, compounded continuously, in order to be able to contribute $7500 to his education?
Do not round any intermediate computations, and round your answer to the nearest cent.
Answers
Mr. and Mrs. Bailey need to invest $2906.50 so as to send their son to college.
Compound interestCompound interest is given by:
[tex]A=P(1+\frac{r}{n})^{nt}[/tex]
where A is the amount after t years, P is initial amount, r is the rate and n is the times compounded per period
Given that n = 1, r = 9% = 0.09, A = $7500 t = 11. Hence:
[tex]7500=P(1+\frac{0.09}{1} )^{1*11}\\\\P=\$2906.50[/tex]
Mr. and Mrs. Bailey need to invest $2906.50 so as to send their son to college.
Find out more on Compound interest at: https://brainly.com/question/24924853
one year the population of a city was 354000. several years later it was 407100. find the percent increase
Answers
Answer:
15% increase
Step-by-step explanation:
Subtract 407100 minus 354000
Divide that amount by the absolute value of the starting value
Multiply by 100 to get a percent increase
Dan selected a random sample of 100 students from the 1,200 at his school to investigate preferences for making up school days lost due to emergency closings. The results are shown in the table.
Preference Number of Students
Extend the school year into the summer 58
Go to school on Saturdays in the spring 42
Dan incorrectly performed a large sample test of the difference in two proportions using 58/100 and 42/100 and calculated a p-value of 0.02. Consequently, he concluded that there was a significant difference in preference for the two options. Which of the following best describes his error in the analysis of these data?
A. No statistical test was necessary because 0.58 is clearly larger than 0.42.
B. The results of the test were invalid because less than 10% of the population was sampled.
C. Dan performed a two-tailed test and should have performed a one-tailed test.
D. A one-sample test for a proportion should have been performed because only one sample was used.
E. More options should have been included, and a chi-square test should have been performed.
Answers
A one-sample test for a proportion should have been performed because only one sample was used.
=========================================================
Explanation:
As the problem states at the very top, "Dan selected a random sample" which is paraphrased to "Dan selected ONE random sample". That keyword "one" means Dan should have used a one-sample test for a proportion. Not a difference in proportions test. This may seem like a trick question, but it's not.
If Dan had 2 samples, then he would go for the difference in proportions of course.
is that not right? or am I just wrong cause it says that it is not right please help
Answers
Answer:
98 cm²
Step-by-step explanation:
The area of a circle is:
[tex]A=\pi r^2[/tex]
A semicircle is half a circle therefore the area of a semicircle would be:
[tex]A=\frac{1}{2}\pi r^2[/tex]
We can plug in the given values into the equation:
[tex]A=\frac{1}{2}*3.142*(7.9)^2\\A=\frac{1}{2}*3.142*62.41\\A=\frac{1}{2}*196.09222 \\A=98.04611[/tex]
We need to round to TWO sigfigs meaning...
[tex]A=98 \ cm^2[/tex]
Sigfig rules:
Nonzero numbers are significant
Trailing zeros are significant (only if there is a decimal point)
Any sandwiched zero is signification (Ex: 405 --> 3 sigfigs)
PLS HELP QUICK!!!
8 x five sixths
fifty three sixths
forty sixths
thirteen forty eighths
five forty eighths
Answers
Answer:
B
Step-by-step explanation:
8*5/6= 20/3 which is equal to 40/6 or forty sixths
Please mark brainlest
First try was incorrect Convert the following number to a percent. 9/ 7 If needed, round to the nearest tenth.
Answers
Answer:
128.6
Step-by-step explanation:
9/7 = 1.28571428571
1.28571428571 x 100 = 128.571428571
rounded = 128.6
look on digit to the right of tenths place (5). Its 5 or higher, its 7, so round the 5 to 6
A rectangle has an area of 32 square feet and a perimeter of 24 feet. What is the shortest of the side lengths, in feet, of the rectangle?
Answers
Answer:
8 ft or 4 ft
Step-by-step explanation:
I`m not sure but I think it might be 8 ft
For which values of x is the expression undefined?
x^2-64 x^2-9
Answers
Answer:
-3, -6
Step-by-step explanation:
Any number of x that makes the bottom 0 makes the expression undefined.
Factor the polynomial in the denominator:
(x+3)(x+6)
Values of x that makes the expression undefined are -3 and -6
Support me by choosing my answer as the brainiest :)
Jessica has $80,000 in a savings account that earns 15% interest per year. The interest is
not compounded. How much will she have in total in 2 years?
Answers
Answer:
24,000
Step-by-step explanation:
first multiply 80,000 and 30 because 15 + 15 from two years is 30.
Then you get 2400000 then divide that by 100 which gives you
24,000 as your answer.
help..................
Answers
Answer:
B
Step-by-step explanation:
Electrons are outstide the shell and hence the nucleas have a charge of protons and neutrons. That's why they say the nucleas of an atom is positive.
Answer:
B
Step-by-step explanation:
The quotient of a number and -8 is -16 equation and solution
Answers
Answer:
x = 128
Step-by-step explanation:
x*(-8) = -16. multiply both sides by -8 to get x by itself
x = 128
helpppppppppppppppppppp
Answers
Answer:
Choose C
Step-by-step explanation:
because one change in the X axis = 8 units up in the Y axis
Solve this please, I really need help.
Answers
For this equation, the bottom part of the equation cannot be zero, so the domain at the moment is:
[tex]x > 4[/tex]
However, also on top, the numerator includes a square root which can equal zero but cannot be negative, thus the domain is
(6, ∞)
Hope that helps!
He has seen 2 vultures out of 12 total birds. What is the experimental probability that the next bird Nate sees will be a vulture?
Answers
Answer:
1/6 based on the given conditions
The table shows some of Mr. Puhas's household expenses for the month of February. Mr. Puhas has 500 set aside for utilities. Use an equation to determine how much money he will have left after he pays for February's utilities
Answers
Money left = money saved - cost of utilities.
Money left = 500 - 319.45
Money left = 180.55
ex. Find the value of x that makes FGH = QRS find HG
Answers
Answer:
x = 6
HG = 9
Step-by-step explanation:
[tex] \frac{10}{25} = \frac{2x - 3}{22.5} \\ \\ 2x - 3 = \frac{22.5 \times 10}{25} = \frac{225}{25} = 9 \\ \\ 2x = 9 + 3 = 12 \\ \\ x = 6[/tex]
HG = 2x - 3 = 2(6) - 3 = 12 - 3 = 9
-3x+4y=7 y=3x-5 I NEED HELP PL Z HELP ME
Answers
[tex] - 3x + 4y = 7 \\ y = 3x - 5[/tex]
[Substitute the given value of y into the first equation][tex] - 3x + 4 \times (3x - 5) = 7[/tex]
[Distribute 4 through the parentheses][tex] - 3x + 12x - 20 = 7[/tex]
[Collect like terms][tex]9x - 20 = 7[/tex]
[Move the constant to the right-hand side and change its sign][tex]9x = 7 + 20[/tex]
[Add the numbers][tex]9x = 27[/tex]
[Divide both sides of the equation by 9][tex]x = 3[/tex]
[Substitute the given value of x into the second equation][tex]y = 3 \times 3 - 5[/tex]
[Multiply the numbers][tex]y = 9 - 5[/tex]
[Subtract the numbers][tex]y = 4[/tex]
[The possible solution of the system is the ordered pair (x,y)][tex](x,y)=(3,4)[/tex]
The president of the student council wants to survey the student population. She decides to take a random sample of
100 students. She puts every student's name on a rectangular slip of paper, each with the same length and width.
Then she places the slips of paper into a hat and, without looking, selects 100 slips of paper. Is this a simple random
sample?
Yes, because the slips of paper were all the same shape and size.
O No, because she did not look into the hat while she was selecting the sample.
O Yes, because she did not look into the hat while she was selecting the sample.
O No, because she did not mix the pieces of paper in the hat before selecting the sample.
Answers
Using sampling concepts, it is found that the correct option regarding if this is a random sample is given by:
Yes, because the slips of paper were all the same shape and size.
How are samples classified?Samples may be classified as:
Convenient: Drawn from a conveniently available pool.Random: All the options into a hat and drawn some of them.Systematic: Every kth element is taken. Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed.Stratified: Also divides the population into groups. Then, a equal proportion of each group is surveyed.In this problem, since the slips have the same shape and size, each name has an equal probability of being chosen, hence it is a random sample and the correct option is:
Yes, because the slips of paper were all the same shape and size.
More can be learned about sampling concepts at https://brainly.com/question/25122507
Answer:
D. No, because she did not mix the pieces of paper in the hat before selecting the sample.
Step-by-step explanation:
let F(x) = x^2 + ax + b when a and b are integers, if F(3+root5) = 0 then what is value of F(4) ?
Answers
Answer:
f(4)=-4
Step-by-step explanation:
WILL GIVE BRAINLIEST
a(down)1 = 2
a(down)n=-3a(down)n-1 + 2
Answers
It looks like you're given a recursive sequence [tex]\{a_n\}[/tex] defined by
[tex]\begin{cases}a_1 = 2 \\ a_n = -3a_{n-1} + 2 & \text{for }n>1 \end{cases}[/tex]
and I assume you wish to solve it.
By definition of the n-th term [tex]a_n[/tex], we have
[tex]a_2 = -3a_1 + 2[/tex]
[tex]a_3 = -3a_2+2 = -3(-3a_1+2)+2 = (-3)^2a_1 - 3\times2 + 2[/tex]
[tex]a_4 = -3a_3+2 = -3((-3)^2a_1 - 3\times2 + 2) + 2 = (-3)^3a_1 +(-3)^2\times2-3\times2+2[/tex]
and so on.
Notice the patterns:
• the exponent of -3 in the coefficient of [tex]a_1[/tex] on the right side is always 1 less than the subscript on the left side
• the sum of terms not involving [tex]a_1[/tex] is a geometric sum of (subscript - 1) terms,
[tex]2 = 2 \times(-3)^0[/tex]
[tex]-3\times2+2 = 2 ((-3)^0 + (-3)^1)[/tex]
[tex](-3)^2\times2-3\times2+2 = 2 ((-3)^0 + (-3)^1 + (-3)^2)[/tex]
This suggests that the general n-th term is
[tex]a_n = (-3)^{n-1}a_1 + 2((-3)^0 + (-3)^1 + (-3)^2 + \cdots + (-3)^{n-2})[/tex]
and with [tex]a_1=2[/tex], this becomes
[tex]a_n = 2(-3)^{n-1} + 2((-3)^0 + (-3)^1 + (-3)^2 + \cdots + (-3)^{n-2})[/tex]
[tex]a_n = 2((-3)^0 + (-3)^1 + (-3)^2 + \cdots + (-3)^{n-2} + (-3)^{n-1})[/tex]
or more compactly in sigma notation,
[tex]a_n = 2 \displaystyle \sum_{k=0}^{n-1} (-3)^k[/tex]
We can go on to get a closed form for [tex]a_n[/tex]. Let S denote the sum,
[tex]S = (-3)^0 + (-3)^1 + (-3)^2 + \cdots + (-3)^{n-2} + (-3)^{n-1}[/tex]
Multiply both sides by -3 :
[tex]-3S = (-3)^1 + (-3)^2 + (-3)^3 + \cdots + (-3)^{n-1} + (-3)^{n}[/tex]
Subtract this from S - lots of terms will cancel:
[tex]S - (-3S) = (-3)^0 - (-3)^{n}[/tex]
[tex]S + 3S = 1 - (-3)^n[/tex]
[tex]4S = 1 - (-3)^n[/tex]
[tex]S = \dfrac{1 - (-3)^n}4[/tex]
It follows that the n-th term of the sequence is explicitly given by
[tex]a_n = 2S = \boxed{\dfrac{1 - (-3)^n}2}[/tex]
Edit: Just noticed your comment. You can get the 5th term by plugging the 4th term back into the recurrence:
[tex]a_1 = 2[/tex]
[tex]a_2 = -3a_1 + 2 = -3\times2 + 2 = -4[/tex]
[tex]a_3 = -3a_2 + 2 = -3\times(-4) + 2 = 14[/tex]
[tex]a_4 = -3a_3 + 2 = -3\times14 + 2 = -40[/tex]
[tex]a_5 = -3a_4 + 2 = -3\times(-40) + 2 = \boxed{122}[/tex]
Or, using the n-th term we found above,
[tex]a_5 = \dfrac{1 - (-3)^5}2 = \dfrac{1 - (-243)}2 = \dfrac{244}2 = \boxed{122}[/tex]
Two sets of three consecutive integers have a property that the product of the larger two is one less than seven times the smallest.set up and solve an equation that can be used to find both sets of integers
Answers
Answer:
(x + 1)(x + 2) = 7x - 1
{1, 2, 3} and {3, 4, 5}
Step-by-step explanation:
Let the three consecutive integers be x, x + 1, and x + 2.
(x + 1)(x + 2) = 7x - 1
x² + 3x + 2 - 7x + 1 = 0
x² - 4x + 3 = 0
(x - 3)(x - 1) = 0
x - 3 = 0 or x - 1 = 0
x = 3 or x = 1
For x = 1,
x = 1, x + 1 = 2, x + 2 = 3
For x = 3,
x = 3, x + 1 = 4, x + 2 = 5
Answer: {1, 2, 3} and {3, 4, 5}
Angle a and b are supplementary angles. If m a = (x – 40)0 and m b = (x + 20)0, find the value of x, m a and m b
Answers
Answer:
∠ a = 60° , ∠ b = 120°
Step-by-step explanation:
Supplementary angles sum to 180° then
x - 40 + x + 20 = 180 , that is
2x - 20 = 180 ( add 20 to both sides )
2x = 200 ( divide both sides by 2 )
x = 100
Then
∠ a = x - 40 = 100 - 40 = 60°
∠ b = x + 20 = 100 + 20 = 120°
Answer:
x=100 a=60 b=120
Step-by-step explanation:
Supplementary angles add 180 degrees
(x-40) + (x+20) = 180
2x-20 =180
2x =100
x = 100
100-40 = 60
100+20 = 120
60+120 +180
Some students are going on a field trip. The cost of the trip is $100, in addition to $7per student. Write an equation that relates the total cost of the trip, C, to the number of students attending,n.
Answers
Answer: C= 100+7n
Step-by-step explanation:
There are 128 balls in a bucket. The balls are numbered from 1 to 128. One ball is randomly selected from the bucket. What is the probability that ball #92 is chosen
Answers
Answer:
1 in 128
Step-by-step explanation:
This may be wrong but wouldn't it be however many balls? It's chose at random?
Answer:
The probability is 1/128
Step-by-step explanation:
There is only ONE ball out of 128 with the #92. The chances it will be chosen is 1 in 128.
solve similar triangles advanced
Answers
Answer: 28/3
Step-by-step explanation:
Triangle ACB is similar to Triangle AED because of AA.
Therefore AB/BC = AD/DE
x/7 = (x+8)/13
We can cross-multiply.
13x = 7(x+8)
We can distribute the 7.
13x = 7x + 56
6x = 56
x = 28/3
Which of the following is important to do when planning an experiment? (1 point)
Make sure that your friends will be there when you do the experiment.
Make sure that the experiment is safe to conduct.
Make sure that nobody else can copy the experiment.
Make sure that you don't know what the experiment is testing.
Answers
Answer:
B
Step-by-step explanation:
Because none of the other answers make sense
Answer:
Make sure that the experiment is safe to conduct.
Step-by-step explanation:
If it is noy safe do not conduct it because you could get hurt.
Hope this helps!
Find and fix the incorrect statement
Answers
Do this question if you are interested
[tex] - 2x ^{2} + x + 21 [/tex]
:)
Answers
[tex]-2x² + x + 21[/tex]
Common factor
[tex]-2x² + x + 21[/tex]
[tex]-1(2x²-x-21)[/tex]
Use the sum-product pattern
[tex]-1(2x²-x-21)[/tex]
[tex]-1(2x² +6x-7x - 21)[/tex]
Common factor from the two pairs
[tex]-1(2x² + 6x - 7x - 21)[/tex]
[tex]-1(2x(x + 3) - 7(x+3))[/tex]
Rewrite in factored form
[tex]-1(2x(x + 3) - 7(x+3))[/tex]
[tex]-1(2x-7)(x+3)[/tex]
Answer :-[tex]{\large{ \red{{{-1(2x-7)(x+3)}}}}}[/tex]
