A teacher has 25 students in a class. Each student has to pay $12.50 for a workbook to use in class. During the
first week of school, 7 students paid for their workbook. The remaining students paid for their workbook during the
second week of school. How much money did the teacher collect during the second week of school, what is the number problem
What value of x is a solution to the equation?
X - 2 = 16 (1 point)
A. 14
B. 18
C. 21
D. 12
Answer:
B. 18
Step-by-step explanation:
we need to isolate x to find the solution
x -2 +2 = 16 + 2
x = 18
Courtney needs to find 2,495 ÷ 48. In which place should she write the first digit of the quotient?
Answer:
On the inside of the "box" (long division).
Step-by-step explanation:
Whenever you are dividing, the first quotient goes inside the "box", and the second quotient goes on the outside.
(I am not sure what the symbol is called, that is why I called it a box.)
Hope this helps!
Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations. Kathy and her brother Clay recently ran in a local marathon. The distribution of finishing time for women was approximately normal with mean 259 minutes and standard deviation 32 minutes. The distribution of finishing time for men was approximately normal with mean 242 minutes and standard deviation 29 minutes. The finishing time for Clay was 289 minutes. Calculate and interpret the standardized score for Clayâs marathon time. Show your work.
Answer:
Clay's finishing time is 1.68 standard deviation above the mean finishing time for men.
Step-by-step explanation:
In statistics, a standardized score is the number of standard deviations an observation or data point is from the mean.
Let us consider a random variable, X that follows a normal distribution, N (µ, σ²).
Then Z is a standard normal variate with mean, E (Z) = 0 and Var (Z) = 1. That is,
[tex]Z=\frac{x-\mu}{\sigma}\sim N(0, 1)[/tex]
This, z-score is known as the standardized score.
It is provided that the distribution of finishing time for men (say, X) was approximately normal with mean µ = 242 minutes and standard deviation σ = 29 minutes.
The finishing time for Clay was x = 289 minutes.
Compute Clay's z-score as follows:
[tex]Z=\frac{x-\mu}{\sigma}[/tex]
[tex]=\frac{289-242}{29}\\\\=1.67857143\\\\\approx 1.68[/tex]
Thus, Clay's standardized score is 1.68.
That is, Clay's finishing time is 1.68 standard deviation above the mean finishing time for men.
the price of a bookcase including 8% sales tax is $378 what is the price of the bookcase before sales tax
Answer:
$347.76
Step-by-step explanation:
sales tax= $30.24
378 - 30.24 = 347.76
It took Jed 2/4 of an hour to complete his math homework on Friday, 2/3 of an hour on Saturday, and 3/6 of an hour on Sunday.How many hours did he take to complete his homework altogether?
It took Jed a total of 1 2/3 hours to complete his homework altogether
In 2012 Staci invested $14,500 in a savings account for her newborn son. The account pays 3.6% interest each year. Determine the accrued value of the account in the year 2030, when her son will go to college. Round your answer the nearest cent.
In the year 2030, the accrued value will be $
Answer: $23,896
Step-by-step explanation:
In the year 2030, the number of years since the investment would be;
= 2030 - 2012
= 18 years.
As the question does not mention that the interest paid is compounded, simple interest will be used;
= Amount + (Amount * interest rate * number of years).
= 14,500 + ( 14,500 * 0.036 * 18)
= $23,896
The baker has 42 kilograms of flour. She uses 8 kilograms each day.after how many days will she need to buy more flour?
Answer:
5 days 6hours
Step-by-step explanation:
Given data
total amount of flour=42kg
number of kg used per day=8kg
Since we are expected to know when she will need more, we need to divide the total flour by the daily usage, to know when the flour we be exhausted
divide 42 by 8 we have
42/8=5.25------0.25 days to hours is 6hours
So it will take 5 days 6hours
Y = 3x(x -4) how many solutions
-50<7k+6<-8 show the steps
Answer:
-8 is less than k is less than -2
Step-by-step explanation:
I think we are trying to find k
-50 is less than 7k+6 is less than -8
-6 -6 -6
-56 is less than 7k is less than -14
-56/7 is less than 7k/7 is less than -14/7
-8 is less than k is less than -2
Hope this helps!
Answer:
Step-by-step explanation:
-50 - 6 < 7k < -8-6
-56 < 7k < -14
-8 < k < -2
Can someone please help and explain this to what the answer is I’ll give brainliest
Answer:
BOTH THE QUESTIONS ARE SAME!!
When finding a perpendicular slope, you need to change the signs and flip the reciprocal
The answer to your question is:
m = -2
I always get this one wrong I just need help finding out the right answer
Answer:
b,c,d,f
Step-by-step explanation:
ur welcome
brainliest appreciated
PLSSS HELP YA GIRL OUTTT , ( imma mark brainliest) (35 points)
The Air Quality Index, or AQI, measures how polluted the air is in your city and assigns a number based on the quality of the air. Over 100 is “Unhealthy”.
The following quadratic regression equation gives us an estimate of n, which is the number of days the AQI exceeded 100 a particular year. We will use this equation to estimate the number of days the AQI was over 100 in the year 1995.
n = 1.76 t squared minus 13.32 t + 41.00
(Let t represent the number of years since 1990. Therefore, t = 0 corresponds to the year 1990. For the estimate of n, round to the nearest whole day.)
a. 18 days
b. 24 days
c. 182 days
d. 72 days
Answer:
its either B or C
Step-by-step explanation:
hope it helps
sorry if its wrong
Answer:
a
Step-by-step explanation:
If the area of a circle is 64 ft2. What is the radius of the circle?
Answer:
4.51
Step-by-step explanation:
Answer:
r=4.51 ft
Step-by-step explanation:
John bought a car for $36,000, he didn't have enough money to buy the car totally, so he gave $1000 monthly, how much money did he give after 1 year, and how much does he has to give more?
There are twelve months in a year, and he pays $1000 a month, so we get [tex]\$1000*12 = $12,000[/tex] spent in a year. He originally needed to spend $36,000, so he has [tex]\$36,000-\$12,000 = \$24,000[/tex] left.
Please mark as Brainliest if you found this helpful.
Answer:
He payed 12,000 in one year
John has to pay $24000
Step-by-step explanation:
Car cost = $36,000
He gave Monthly = $1000
How much money did he give in a year?
1 year = 12 months
So
$1000 x 12 = 12,000
How does he have balance?
$36,000 - $12,000 = $24,000
John payed $12000 in one year, and has to pay $24000 more to own the car.
Hope you understand
:-)
What is -9.5-(-8)-6.5
Answer:
-8
Step-by-step explanation:
What is 4589 rounded to the nearest thousand
Answer:
35000
Step-by-step explanation:
n 34519, the hundredth digit is 5 and so, rounding off 34519 to the nearest 1000 result in 35000.
The first aircraft has 89 more seats than the second aircraft. The third aircraft has 45 fewer seats than the second aircraft. If their total number of seats is 401, find the number of seats for each aircraft
Answer: The first aircraft has 208 seats.
The second aircraft has 119 and the third has 74.
Step-by-step explanation:
The equation is x+89 + x + x-45 = 401
combine terms: 3x + 44 = 401 Subtract 44 from both sides 3x=357
divide both sides by 3
x= 119
substitute x in each term of the equation to find the number of seats on each aircraft
119 + 89 = 208 for #1 x= 119 for #2 119- 45= 74 for #3
In the following diagram which is not drawn to scale, why can't both line AB and line AC be perpendicular to line BC?
Answer:
AC and AB both can't be perpendicular to line BC because if they were, then AB and AC would be parallel to each other and would never intersect. In this diagram, AB and AC intersect, so it it not possible.
Perpendicular lines meet at a right angle.
AB and AC cannot be perpendicular to BC because AB and AC are not parallel
From the diagram, we can see that line AB and line AC intersects at point A.
This means that both lines are not parallel
For any two lines to be perpendicular to a third line, the two lines must be parallel to each other.
So, we can conclude that:
Lines AB and AC cannot be perpendicular to line BC because both lines are not parallel.
Read more about parallel and perpendicular lines at:
https://brainly.com/question/12731518
Solve the following compound inequality 5y + 7 13.
Answer:
= 5y + 91
Step-by-step explanation:
because you multiply 13 * 7 which equals to 91
and then leave the 5y by yourself because there is no y to add or multiply
***hope the help***
Can anyone help with these? I appreciate and I will award 5 stars and brainliest
Graph 1
coordinates : (0,-5) (-6,-2)
m = (y2-y1)/(x2-x1)
m = (-2-(-5))/(-6-0)
m = 3/-6 = -1/2
Substitute the values,
y = mx + c
-2 = (-1/2)(-6) + c
-2 = 3 + c
c = -5
Thus, equation is y = -1/2x -5
Graph 2
coordinates : ( 4,-2) (-5,3)
m = (y2-y1)/(x2-x1)
m = (3-(-2))/(-5-4)
m = 5/-9
Substitute the values,
y = mx + c
-2 = (-5/9)(4) + c
-2 = -20/9 + c
c = 2/9
Thus, the equation is y = -5/9 + (2/9)
Hope it helps :)
PLEASE HELP!
Thank you! :)
Answer:
1. W'(-4,2), X'(-1,2), Y' (-1,4), Z' (-4,4).
2. W"(4,-2), X"(1,-2), Y"(1,-4), Z"(4,-4)
RULE:
- If reflected an image over x-axis:
x stay the same, y change.
Ex: A(1,2)>>>x-axis= A'(1,-2)
- If reflected an image over y-axis:
x change, y stay the same.
Ex: B(3,4)>>>y-axis= B'(-3,4)
Hope you understand.
The state of Minnesota covers an area of 51 million acres, while the state of Vermont covers 6 million acres. How many times larger is the state of Minnesota as compared to Vermont
Answer: 8.5
Step 1: Multiply by 6 until you reach 51.
6 x 8 = 48.
Step 2: Subtract.
51 - 48 = 3.
Step 3: Convert 3/6 to decimal.
3/6 = .5
Answer = 8.5 times larger
Answer: 8.5
Step-by-step explanation:
please help me with this questions
Answer:
See attached
Step-by-step explanation:
The answers added on the picture
2. Which of the following relations is/are function/s?
a. x = {(1,2), (3,4), (1,7), (5,1)}
b. g = {(3,2), (2,1), (8,2), (5,7)
c. h = {(4,1), (2,3), (2, 6), (7, 2)}
d. y = {(2,9), (3,4), (9,2), (6,7)}
Which of the following is equivalent to the expression 8x+30/10
1. 8x+3
2. 8x+20
3. 4/5x+3
4. 4/5x+30
A koala bear is approximately 25 6 feet tall. Which point on the number line represents this value?
Answer:
A.
Step-by-step explanation:
2 and 5/6 = 2.833
The point closest is A.
Answer:
Step-by-step explanation:
Hello friend!!!!!!
The answer is A
2 5/6 is 17/6 as am improper fraction
17/6 can be written as 2.83.....
It lies between 2.8 and 2.9
so A is the correct answer.
Hope this helps
plz mark as brainliest!!!!!!!!!
= – 1 is a solution of the equation
(a) x – 5 = 6 (b) 2x + 5 = 7 (c) 2(x – 2) + 6 = 0 (d) 3x + 5 = 4
Answer:
c) 2(x-2)+6=0
2(x-2)+6=0
Distribute
2x - 4 + 6 = 0
Combine like terms -4 + 6
2x + 2 = 0
Subtract both sides
2x = -2
Divide both sides
x = -1
If f(x) = 6x + 2, which of the following values would complete the table shown?
Answer:
38
Step-by-step explanation:
f(x)=6x+2
6x6 (6 sqaured)
f(36)=36x+2
Now we add 36+2
38
Answer:
14 and 50 :)
Step-by-step explanation:
Laura sells beaded necklaces each large necklace sells for $6.80 and each small necklace sells for $5.10 how much will she earn from selling three large necklace and one small necklace
Answer:
25.5
Step-by-step explanation:
3 large necklaces equals 20.4 plus 5.10 equals 25.5
