Rachel travelled 240 km in 4 hours by train and then travelled 120
km in 3 hours by car. What is the average speed during the whole
journey?
A. 60.9 km/hr
B. 55 km/hr
C. 51.42 km/hr
D. 78 km/hr
Answer:
B I believe.
Step-by-step explanation:
How many \frac{1}{3} 3 1 inch cubes does it take to fill a box with width 22 \frac{2}{3} 3 2 inches, length 33 \frac{1}{3} 3 1 inches, and height 22 \frac{1}{3} 3 1 inches?
Answer:
560Step-by-step explanation:
First we need to find the volume of the cube;
Volume = Length * Width * height
Given;
Length = 3 1/3 in
Width = 2 2/3 in
Height = 2 1/3 in
Volume = 3 1/3 * 2 2/3 * 2 1/3
Volume = 10/3 * 8/3 * 7/3
Volume = 560/3 in^3
To know thw amount of 1/3 in^3 it takes to fill the box, we will take the ratio of the volume to the unit volume;
Ratio = 560/3÷1/3
Ratio = 560/3 * 3/1
Ratio = 560
Hence it will take 560 1/3 in^3 to fill a box with that volume
POSSIBLE POINT
Ms. Gomer-Weyh loves to ski! She joined a local ski club which is featuring a special $20 registration fee plus $30 per visit for up to 4 visits.
Write the equation and make a graph that models the situation.
Answer:
I can only make an equation
20+30(4)+y(z)=X
Step-by-step explanation:
SO we know the registration fee is 20 dollars so that can’t change
We know that its 30 dollars for up to 4 visits so 30*4
THe Y is for the amount it take to ski after the 4 times
The Z is for the amount of times you went after the 4 times
So yeah
three times a number, less 4 is
2
Answer:
2
Step-by-step explanation:
The radius of a cone is decreasing at a constant rate of 5 centimeters per minute, and the volume is decreasing at a rate of 148 cubic centimeters per minute. At the instant when the radius of the cone is 222 centimeters and the volume is 21 cubic centimeters, what is the rate of change of the height? The volume of a cone can be found with the equation V=1/3πr^2h. Round your answer to three decimal places.
Answer:
The rate of change for the height of the cone is [tex]-2.849\times 10^{-3}[/tex] centimeters per minute.
Step-by-step explanation:
We derive an expression for the rate of change for the height of the cone by differentiating the volume formula given on statement:
[tex]\dot V = \frac{\pi}{3}\cdot (2\cdot r\cdot h \cdot \dot r + r^{2}\cdot \dot h)[/tex] (1)
Where:
[tex]\dot V[/tex] - Rate of change for the volume of the cone, measured in cubic centimeters per minute.
[tex]r[/tex] - Radius of the cone, measured in centimeters.
[tex]h[/tex] - Height of the cone, measured in centimeters.
[tex]\dot r[/tex] - Rate of change for the radius of the cone, measured in centimeters per minute.
[tex]\dot h[/tex] - Rate of change for the height of the cone, measured in centimeters per minute.
If we know that [tex]\dot V = -148\,\frac{cm^{2}}{min}[/tex], [tex]r = 222\,cm[/tex], [tex]V = 21\,cm^{3}[/tex], [tex]\dot r = -5\,\frac{cm}{min}[/tex], then the rate of change for the height is:
[tex]h = \frac{3\cdot V}{\pi\cdot r^{2}}[/tex] (2)
Where [tex]V[/tex] is the volume of the cone, measured in cubic centimeters.
[tex]h = \frac{3\cdot (21\,cm^{3})}{\pi\cdot (222\,cm)^{2}}[/tex]
[tex]h \approx 4.069\times 10^{-4}\,cm[/tex]
From (1):
[tex]\frac{3\cdot \dot V}{\pi} = 2\cdot r\cdot h\cdot \dot r + r^{2}\cdot \dot h[/tex]
[tex]r^{2}\cdot \dot h = \frac{3\cdot \dot V}{\pi}-2\cdot r\cdot h\cdot \dot r[/tex]
[tex]\dot h = \frac{3\cdot \dot V}{\pi\cdot r^{2}}-\frac{2\cdot h\cdot \dot r}{r}[/tex]
[tex]\dot h = \frac{3\cdot \left(-148\,\frac{cm^{3}}{min} \right)}{\pi\cdot (222\,cm)^{2}} -\frac{2\cdot (4.069\times 10^{-4}\,cm)\cdot \left(-5\,\frac{cm}{min} \right)}{222\,cm}[/tex]
[tex]\dot h = -2.849\times 10^{-3}\,\frac{cm}{min}[/tex]
The rate of change for the height of the cone is [tex]-2.849\times 10^{-3}[/tex] centimeters per minute.
plssss helpppp !!!! find the missing side length me in the rectangular prism
Find the value of x in the parallelogram.
Answer:
x=2/3
Step-by-step explanation:
6x=3x+2
3x=2
x=2/3
Please help need this fast I’m timed.
-28
-3
3
15
Answer:
-28
Step-by-step explanation:
-28
What was the difference in the starting temperature and the ending temperature
Answer:
You subtract the final temperature from the starting temperature to find the difference. So if something starts at 50 degrees Celsius and finishes at 75 degrees C, then the change in temperature is 75 degrees C – 50 degrees C = 25 degrees C. For decreases in temperature, the result is negative.
Step-by-step explanation: really not sure how to explain but in my understood thats my answer
Find the value of x..........
Answer:
23
Step-by-step explanation:
4x+3=95
4x=92
x=23
A jar contains 444 red marbles, 444 green marbles, and 555 blue marbles.
If we choose a marble, then another marble without putting the first one back in the jar, what is the probability that the first marble will be blue and the second will be green?
Answer:
5/39
Step-by-step explanation:
solve for x... Please i need help!
Answer:
6
Step-by-step explanation:
x=6
ax+bx=cx
10+bx=16
10+6=16
x=6
pls help ill give extra points
Answer:
13x
Step-by-step explanation:
Answer:
13x
Step-by-step explanation:
So we need to make the denominator equal in order to collect like terms.
25x^2/5x+8x^2/x =?
Denominator needs to be 5x so multiply the second quotient by 5.
25x^2/5x + 40x^2/5x = ?
=65x^2/5x
=13x^2/x <---- x^2/x is like 2-1 which is exponent 1, x to the exponent 1 is x
=13x
Your answer is 13x
If a projectile is fired straight upward from the ground with an initial speed of 64 feet per
h(t) = - 16t? + 64t. Find the maximum height of the projectile.
The maximum height of the projectile is
(Simplify your answer.)
Answer:
h = 64 feet
Step-by-step explanation:
If you graph the function you see that 64 feet is the maximum of the parabola so this is the max height that the projectile reaches.
Pleaseeeee helpppp !!!!!!! Will mark Brianliest !!!!!!!!!!!!!!
Answer:
x = 6
Step-by-step explanation:
This means that they are equivalent to each other.
10 = 30 *Multiply by 3
2 = x
Since we multiplied by 3 to get 30, x is just 2 mulitplied by 3.
x = 6
Answer:
Hi
the answer would be:
10/40 = 2/2+x => if you solve the equation, it'll be equal to : x = 6
I hope that it's correct.
Step-by-step explanation:
{(2,2),Is this a function?
what is 16/20 to the nearest hundreth
Answer:
First, we convert the fraction to a decimal number by dividing the numerator by the denominator:
16 / 20 = 0.800
There are two parts to the decimal number above:
Integer Part: 0
Fractional Part: 800
Now, we will make the Fractional Part just two digits (nearest hundredth) by using our rounding rules.*
In this case, Rule I applies, so 16/20 (or 0.800) rounded to the nearest hundredth in decimal format is:
0.80
Next, we will make 16/20 rounded to the nearest hundredth in fraction format. Since you can divide our decimal format answer above by 1 and keep the same value, you can make it like this:
0.80 = 0.80/1
Then, we multiply the numerator and denominator by 100 to get rid of the decimal point:
(0.80 x 100) / (1 x 100) = 80/100
That's it. 16/20 rounded to the nearest hundredth is displayed below (simplified if necessary):
4/5
Robert run the 100 meter dash in 13.5. later he run same distance in 10.3 seconds. how many seconds less did it take him to run the same distance the second time?
Answer:
3.2seconds
Step-by-step explanation:
Step one:
Robert run the 100 meter dash in 13.5 seconds
We are told that he later run same distance in 10.3 seconds
Required.
The time difference in the first dash and the second
Step two:
The first dash took 13.5 seconds
the second took 10.3 seconds
the difference = 13.5-10.3= 3.2seconds
Renee spent 1/8 of the day landscaping around the house. She spent half of the time pulling weeds. What fraction of the day did rehne spend pulling weeds?
Answer:
The fraction of the day Rehee spent pulling weeds = 1/16
Step-by-step explanation:
Let us take the fraction representing a whole day to be a whole number - 1
Renee spent 1/8 of the day landscaping around the house.
This means she spent 1/8 X 1 landscaping around the house = 1/8
She spent half of the time pulling weeds.
This means she spent 1/2 of 1/8 of 1 landscaping around the house = 1/16
1/2 X 1/8 X 1 = 1/16
The fraction of the day Rehee spent pulling weeds = 1/16
The radius of a circle is 6 yards. What is the circle's area?
Use 3.14 for PI
Answer:
113.04
Step-by-step explanation:
To calculate a circle's area, the formula is Pi R Squared. R is radius. Radius squared would be 36. (6*6) Now, multiplied by Pi, the area would be: 113.04. (36*3.14)
Answer:
113.04
Step-by-step explanation:
The radius of a circle is 6 yards. What is the circle's area?
r=6 yd
Use 3.14 for .
square yards
You answered:
113.1
square yards
remember
Use this formula to find the area from the radius.
A=r2
Use 3.14 as an approximation for .
≈3.14
solve
The radius is 6 yards. Replace r by 6 in the formula.
A
= r2
≈ 3.1462
≈ 3.1466
≈ 113.04
The area is about 113.04 square yards.
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HELP PLEASE
g(1)=5
g(n)=-1 x g(n-1)-4
g(2)=
I WILL GIVE 30 POINTS (if its right)
Answer:
g(2) = -9
Step-by-step explanation:
g(2) = -1 x g(1) - 4
g(2) = -1 x 5 - 4
g(2) = -5 - 4
g(2) = -9
20 points-
I need help
Answer:
11 is 150
12 is 168 lectures and 70 professers
Step-by-step explanation:
Why does -30 - - 50 equal 20? What steps are being done?
Answer:
Step-by-step explain
1. 30-50=20
2. Two negatives equal a positive
So first you subtract 30 by 50 and get 20 then you look at the signs which are both negative. Meaning both of the negative signs become a positive. (-30)-(-50)=20
After w weeks , a student has saved 100 + 15w dollars. How much money has the student saved after 3 weeks ?
A$105
B$65
C$120
D$145
Answer:
The student will have $145
Step-by-step explanation:
The student would already have $100 and if you take 15 times the number of weeks, 3 weeks. 15 times 3 is $45. $100 + $45 = $145
Answer:
D. $145
Step-by-step explanation:
In order to find out the answer to the equation 100 + 15w = ? we have to multiply 15 by the 3 weeks the student has saved up 15 dollars to get the total money they have saved by saving 15 dollars per week:
15 * 3 = 45
we then add the 100 dollars that was already saved up to 45
100 + 45 = $145
So after 3 weeks $145 have been saved up
Hope this helps!!!
Which list shows these numbers in order from least to greatest?
Answer:
-3,-2,0,2,3 [c]
Step-by-step explanation:
I had that quiston on my warm up [edge 2021] and got it right
i first tried b and that didnt work
15t +95 + 5 - 9
i need help asap
What is the surface area of the rectangular prism?
3 in.
12 in.
9 in
A
358 in
B
342 in?
315 in
D
306 in
Answer: the answer is b
Step-by-step explanation:
Answer:
Oh im doing my star 360 test rn too!
Step-by-step explanation:
1.873, 1.9, 1.78, 1.84, 1.779, 1.742
LESSER GREATER
ASAP PLEASE
Answer:
Lesser to greater
Step-by-step explanation:
1.742
1.779
1.78
1.84
1.873
1.9
Pls answer if u know :)
This is a very important homework and i was gone for days so idk
Answer:
Option B
Step-by-step explanation:
Slope of the line is calculated by the formula:
[tex]m=\frac{y_2-y_1}{x_2-x_1}\\\\[/tex]
We have the points ( -2 , 4) and (3 , -5) so plug in the values in the formula:
[tex]m=\frac{y_2-y_1}{x_2-x_1}\\\\m=\frac{-5-4}{3-(-2)}\\\\m=\frac{-9}{5}\\[/tex]
so the slope(m) equals -9/5
The rug in Diana's dining room is 216 inches by 240 inches. She wants to put a similar-sized rug in her living room. What size rug would be similar to the dining room rug?
A. 84 inches by 96 inches
B. 108 inches by 110 inches
C. 96 inches by 118 inches
D. 72 inches by 80 inches
I"LL GIVE BRAINLIEST!!!!
Answer:
D
Step-by-step explanation:
In order for the rug to be similar to the first rug, the measurements must have the same ratio as the original measurements.
Longer over shorter: 240/216 = 10/9
Let's look at A: 96/84 = 8/7 (NOT 10/9)
Let's look at B: 110/108 = 55/54 (NOT 10/9)
Let's look at C: 118/96 = 59/48 (NOT 10/9)
Let's look at D: 80/72 = 10/9 (= 10/9)
D is similar
Hope this helps!