5% or 5percent can be thought of 5 per 100.
5 per 100 or 5 out of 100 can be written as 5/100 or 1/20.
An hour have 60 minutes and 1/20 of an hour is 60*1/20=3 minutes.
Therefore Sara can work 3 minutes every hour.
I need some help with this and with the other 6 question! Help this girl in need
Answer:
i think it is y=15x-6
Step-by-step explanation:
if it is correct plz plz mark as brainliest
thank you
19NBoli
Answer:
y = 2x-6
Step-by-step explanation:
Slope intercept form:
y = mx+b
m = slope
In this case the slope is 2/1 or 2.b = The point where the line crosses the y-axis
In this case -6 is the exact point the line crosses the y-axisSo if you put it all together you get the answer of:
y = 2x-6
I hope this helped!
P.S. I am so sorry I couldn't respond earlier :(
Sincerely,
Rekifromsk8theinfinity
:D
find the number n of hours you need to study on Saturday so that mean number of hours you study per day is 1.5
Days Hours
Sunday 0
Monday 1.5
Tuesday 2.5
Wednesday 2.5
Thursday 3
Friday 0
Sunday N
Answer:
1 hour
Step-by-step explanation:
We are given that
Day Hours
Sunday 0
Monday 1.5
Tuesday 2.5
Wednesday 2.5
Thursday 3
Friday 0
Saturday n
Mean number of hours of study per day=1.5
Mean=[tex]\frac{sum\;of\;data\;}{total\;number\;of\;data\;points}[/tex]
Total number of days=7
Using the formula
[tex]1.5=\frac{0+1.5+2.5+2.5+3+0+n}{7}[/tex]
[tex]1.5\times 7=9.5+n[/tex]
[tex]10.5-9.5=n[/tex]
[tex]n=1[/tex]
Hence, number of hours you need to study on Saturday=n=1
If a family has 8 children , in how many ways could the parents have 5 boys and 3 girls
That depends on what you mean by a "way" of having children. Some of the more obvious answers: One. Four boys and four girls, there's no other way of getting that many boys or that many girls. 40320. Usually each child has its own distinct DNA. The information in DNA can be converted into a number, and there are 8-factorial = 8! = 40320 orderings for eight numbers. 70. If each boy is considered to be the same until it is born and then named, so that the first four boys will always be named the same way and the same for the girls, then you can find the number of ways using binomial coefficients. The number of ways of arranging four equal boys and four equal girls into an order, is the same as the number of ways of choosing four numbers from 1 to 8 representing the position of the boys in that order. The number of ways of choosing a set of 4 numbers from 8 is called "8 choose 4" sometimes written 8C4 and is calculated as (8*7*6*5)/(4*3*2*1) (The numererator product in nCr stops when you have r numbers) (8*7*6*5)/(4*3*2*1) = 70
Answer:
As parents have 5b and 3 g
so if we add them it becomes 8
hence family has 8 children
Find the curved surface area of a cylinder if it's base circumference is 36 cm and it's height is 4 cm
Answer:
CSA of a cylinder = 144cm²
Step-by-step explanation:
Given the following data;
Base circumference = 36cm
Height = 4cm
To find the curved surface area (CSA) of the cylinder;
CSA of a cylinder = 2πr * h
But 2πr = 36cm
Substituting the values into the equation, we have;
CSA of a cylinder = 36 * 4
CSA of a cylinder = 144cm²
can someone please solve this?
I'm stuck and I don't know how
Answer:
D
Step-by-step explanation:
If im inncorect you can check this with "Mathaway"
Answer: D
Hope this helps!
Help ASAP!!! Very confused
Answer:
Angle JKM = ANGLE JKL - MKL
= 155 - 39
= 116
Using eight eights and addition only, can you make 1000?
Answer:
888 + 88 + 8 + 8 + 8 = 1000
simple
Translate and solve: −5 times b is no less than −35.
William is thinking of a number, n and he wants his sister to guess the number. His first clue is that five less than two times his number is at least negative three and at most fifteen. Write and solve a compound inequality that shows the range of numbers that William might be thinking of.
Answer:
-3[tex]\leq \\[/tex]2n-5[tex]\leq[/tex]15
Step-by-step explanation:
2n-5 at least -3, at most 155. Amy, Beth and Colin share some sweets in the ratio 2:3:4
Amy received 8 sweets.
Work out the number of sweets Beth receives.
Answer:
let the rati be x
2x=8
x=4sweets
beth=3x=3×8=24 sweets
Step-by-step explanation:
plz make me brainliest
Ira bought a t-shirt that was discounted 50%. He used a coupon for 50% off at the cash register. Why was he charged $6.50 instead of $0?
50% off makes the new price half of the original, then another 50 % would be half off the discounted price, so they actually end up paying 25 % of the original price:
50 % x 50 % = 25 %
Answer:
she was charged for 50% of the 50% off
Step-by-step explanation:
Lets say the original price was 100$ The store discounted it by 50% so it is now 50$ but the coupon take 50% off of that 50 so it would be 25$
2. The water rate for Charlotte, North Carolina, is $1.33 per 748 gallons of water used.
a. What is the water bill if 30,000 gallons of water are used?
b. How many gallons of water can be used for the water bill to be $150.
Answer:
I'm only here cause of the pfp haha
Step-by-step explanation:
you look good if that's you
Answer:
a) $53.34
b) 84,360.9 gallons
Step-by-step explanation:
let 'x' = cost of bill for 30,000 gallons
a) i set up a proportion as follows:
$1.33/748g = x/30,000
i cross-multiplied and got $53.34
b) i set up a proportion as follows:
let 'y' = how many gallons $150 can buy
$1.33/748g = 150/y
i cross-multiplied and got 84,360.9 gallons
A set of 6 number cards contain the numbers 2, 5, 7, 8, 9, and 11. Which ratio is less than the ratio of odd number cards to total cards in this set?
Answer:
[tex]Ratio = 2:3[/tex]
Step-by-step explanation:
Given
[tex]Cards = \{2,5,7,8,9,11\}[/tex]
Required
Ratio of odd numbers to total
First, list out the odd numbers
[tex]Odd = \{5,7,9,11\}[/tex]
The card has 4 odd numbers out of a total of 6.
So, the ratio is:
[tex]Ratio = Odd : Total[/tex]
[tex]Ratio = 4:6[/tex]
Divide by 2
[tex]Ratio = 2:3[/tex]
Hence, the ratio of odd to total is 2 to 3
what is the area of a rectangle that is 4 inches long and 1 3/4 inches wide
Answer: 7 inches
Step-by-step explanation:
4 times 1 3/4 is 7
1. The average attendance at a local high school this year was 950
students. Each year the attendance decreases at a rate of 0.5% per year.
What will the average attendance be in three years? *
find the logarism of 6395
Answer:
this is clear that answer
The median household income in the US grew linearly from approximately $30, 000 in 1990 to $48, 000 in 2006. Let x be the number of years since 1990. Express the median income as a function of x. Use this function to approximate the median income in 2030. What is the significance of the slope of this function
Answer:
[tex]y = 1125x+30000[/tex] --- The equation
The median income in 2030 is $75000
Step-by-step explanation:
Given
Represent years since 1990 with x and the income with y.
So, we have:
[tex](x_1,y_1) = (0,30000)[/tex] --- In 1990
[tex](x_2,y_2) = (16,48000)[/tex] --- In 2006
Solving (a): Express as a function.
First, we calculate the slope
[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
[tex]m = \frac{48000-30000}{16-0}[/tex]
[tex]m = \frac{18000}{16}[/tex]
[tex]m = 1125[/tex]
The equation is then calculated as:
[tex]y = m(x-x_1)+y_1[/tex]
This gives:
[tex]y = 1125(x-0)+30000[/tex]
Open bracket
[tex]y = 1125x-0+30000[/tex]
[tex]y = 1125x+30000[/tex]
Solving (b): Income in 2030.
In 2030, x = 40.
Substitute 40 for x in [tex]y = 1125x+30000[/tex]
[tex]y = 1125*40 +30000[/tex]
[tex]y = 45000 +30000[/tex]
[tex]y = 75000[/tex]
Solving (c): The significance of the slope.
In (a), the slope is calculated as 1125.
This implies that the yearly rate is $1125
what is the constant of proportionality in y=3 and x=46.50
plsssssssss help its for homework
Answer:
58y is the correct answer to this question
Find the third term of a proportional if the first, second and fourth terms are 24, 36, 126, pls help me :(
Answer:
84
Step-by-step explanation:
Let the third term be x.
So, the numbers will be:
24, 36, x, 126
Since, all the four terms are in proportion.
Therefore,
[tex] \frac{24}{36} = \frac{x}{126} \\ \\ x = \frac{24 \times 126}{36} \\ \\ x = \frac{3,024}{36} \\ \\ x = 84[/tex]
Can someone help on this please?
Answer:
The mean is 8.4
Step-by-step explanation:
First you find the class centers.
3-6 = 4.5
7-10 = 8.5
11-14 = 12.5
15-18 = 16.5
The sum of all the scores = 4.5 * 7 + 8.5 * 10 + 12.5 * 6 + 16.5 + 2 = 210
The sum of the number of scores = 7 + 10 + 6 + 2 = 25
The mean = 210/25 = 42/5 = 8.4
A motor cyclist completes a journey at an average speed of 65 mph in 3½ hours. Calculate the distance travelled.
Answer:
227.5
Step-by-step explanation:
65 mhp
after 3.5 h
Just multiply
65 x 3.5 = 227.5
Answer:
227.5
Step-by-step explanation:
multiply 65 mph to 3 1/2 [3.5 (estimated)] to calculate the distanbce travelled
Kyla sold her laptop to Fely in a condition that Fely should give he a downpayment of Php8,000 and Fely will pay her Php1,000 every month for 1 year .if the money ears 0.5% compound monthly what is the market value of Fely's offer?
Plz help me solve this!!-
Amy drove her hoverboard 3 miles in 40 minutes. Jim hopped 2 miles in 20 minutes. Who traveled at a greater average speed? Define an appropriate unit of speed and provide mathematical justification for your answer
Answer:
Amy traveled at 4.5 mph, while Jim traveled at 6 mph. Therefore, Jim traveled at a greater average speed.
Step-by-step explanation:
Given that Amy drove her hoverboard 3 miles in 40 minutes, while Jim hopped 2 miles in 20 minutes, to determine who traveled at a greater average speed, the following calculation must be performed:
(3/40) x 60 = Amy's speed
0.075 x 60 = Amy's speed
4.5 = Amy's speed
So Amy traveled 4.5 miles per hour.
(2/20) x 60 = Jim's speed
0.1 x 60 = Jim's velocity
6 = Jim's speed
Instead, Jim traveled 6 miles per hour.
Therefore, Jim was the one who traveled at a greater average speed.
Without making any calculations, which distribution of data has the largest standard deviation?
1, 1, 1, 1, 4, 4, 7, 7, 7, 7
1, 1, 1, 4, 4, 4, 4, 7, 7, 7
1, 1, 4, 4, 4, 4, 4, 4, 7, 7
1, 4, 4, 4, 4, 4, 4, 4, 4, 7
Answer:
#4 it makes the most sense.
Step-by-step explanation:
Sorry if i'm wrong
Answer:
It's the first one, A
Step-by-step explanation:
Plugged each one into a SD calculator, the first one is the largest
PLEASE HELP ME WITH GEOMETRY. I need help with this problem but I don't just want the answer, I want to know how to do it. Thank you.
Answer:
Pythagorean theorm
Step-by-step explanation:
A^2+B^2=C^2
c is the long line, a and b are the outside lines
A 12-m ladder is leaning against a wall.
The foot of the ladder is 3 m from the base of
the building. How far up the wall is the top
of the ladder?
Answer:
Step-by-step explanation:
Use Pythagorean's Theorem for a right triangle. Your best bet when learning/visualizing word problems is to draw a picture, then learn how to visualize in your head over time.
[tex]3^2+x^2=12^2\\9+x^2=144\\x=\sqrt{135}[/tex]
The radical can be further simplified because 135 is the product of 9 and 15. 9 has a perfect root of 3.
[tex]x=3\sqrt{15}[/tex] meters or 11.62 meters
1. The average police office writes 40 tickets each week (with a standard deviation of 12). If the number of tickets a police officer writes in a week is normally distributed, what is the probability that an officer writes more than 60 tickets in a week?
Answer:
3/5
Step-by-step explanation:
7 1/3 : 2 4/9= what does it equal?
Answer:
3/1 or 3
Step-by-step explanation:
7 1/3 = 7x3 + 1/3 =21 + 1/3 =22/3
7x3/3 = 21/3
-------------------------------------------------
2 4/9 2x9 + 4/9 = 18 + 4 /9= 22/9
2x9/9 = 18/9
Divide: 22/3 : 22/9 =22/3 x9/22 =
22/3 x 9/22 = 198/66 66/66 x 3/1 = 3
A rocket is launched from a tower. The height of the rocket, y in feet, is related to the
time after launch, x in seconds, by the given equation. Using this equation, find the
time that the rocket will hit the ground, to the nearest 100th of second.
y = -16x^2 + 232x + 134
Answer:
15.06 seconds.
Step-by-step explanation:
Hit Ground→Height=0
−16x^2 +232x + 134=0
PLS HELP TIMED QUESTION!!!
A quantity with an initial value of 9800 decays exponentially at a rate such that the quantity cuts in half every 6 days. What is the value of the quantity after 138 hours, to the nearest hundredth?
Answer:
About 5043.58
Step-by-step explanation:
The standard form for an exponential decay after t time is:
[tex]\displaystyle f(t)=a(r)^{t/d}[/tex]
Where a is the initial value, r is the rate decay, t is the time that has passed, and d is the amount of time it takes for 1 cycle.
The initial value is 9800. So a = 9800.
The quantity cuts in half. So, r = 1/2.
And it cuts in half every 6 days. For this question, we will convert this to hours. 6 days = 144 hours. So, we can let d = 144, where t will be in hours.
Therefore, our function is:
[tex]\displaystyle f(t)=9800\Big(\frac{1}{2}\Big)^{t/144}[/tex]
Where t is the amount of time that has passed, in hours.
Then the quantity left after 138 hours will be:
[tex]\displaystyle f(138)=9800\Big(\frac{1}{2}\Big)^{138/144}\approx 5043.58[/tex]
Anna purchased a phone with a rectangular screen that measures 6,5 centimeters in width and 12 centimeters in length. She wants to know the diagonal measure of
the screen. Round your answer to the nearest tenth of a centimeter
6.5 cm
12 cm
Answer:
78? pls correct me if I'm wrong
Step-by-step explanation:
Length times Width equals Area.
6.5×12=78
Answer:
anywhere within 13.5 < cm < 14.5 ie) 13.7cm
Step-by-step explanation:
Pythagoras for all diagonals or right angle sides.
12^2 + 6.5^2 = c^2
sqrt 144 + sq rt 42.25 = c^2
c^2 = sq rt 186.25 = 13.6473441 = 13.7cm
nearest 10th of a cm = 13.5<cm<14.5