1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kakasveta [241]
3 years ago
6

please provider answer? A train travels 160160 km in the same time that a plane covers 720720 km. If the speed of the plane is 2

020 km per hr less than 55 times the speed of the? train, find both speeds
Mathematics
1 answer:
lys-0071 [83]3 years ago
3 0
T=time
d=st
r=train speed
p=plane speed

<span>160=rt
</span><span>720=pt

speed of plan is 20kmph less than 5 times speed of train
p=5r-20

we notice that 160 times 4.5=720
times first equaton by 4.5

720=4.5rt
720=pt
set equal
4.5rt=pt
divide both sides by t
4.5r=p
sub </span><span>p=5r-20 for p
4.5r=5r-20
minus 4.5r from both sides
0=0.5r-20
add 20 to both sides
20=0.5r
times 2 both sides
40=r

sub back</span><span>
p=5r-20
p=5(40)-20
p=200-20
p=180

plane is 180kmph
train is 40kmph
</span>
You might be interested in
Can I have help with 9 it’s seems easy but I need help
victus00 [196]
A number coming out of an absolute value is ALWAYS positive.
A. 45
B. 8
C. -22
D. -4
3 0
3 years ago
Please help me I tried multiplying it, dividing it, etc.... and it wouldn't work? This is my final chance to get this question r
Yuliya22 [10]

Answer:

let t=9    =1296

let t= 10  =1600

let t=11   =1936

let t = 12  =2304

Step-by-step explanation:

16t^2

let t=9

16(9)^2 = 16*81=1296

let t= 10

16 *10^2 = 16*100=1600

let t=11

16*11^2 =16*121=1936

let t = 12

16*12^2 =16*144=2304

6 0
4 years ago
The volume of a cone is 62.8 cubic inches. The height of the cone is 15 inches. What is the radius of the cone, rounded to the n
SOVA2 [1]
Recall the formula for volume of a cone:  V = (1/3)(base)(height).

Here the volume is V = 62.8 cu in. = (1/3)(pi* r^2)(15 in)
              
                   62.8 cu in      
or, r^2 = --------------------------  = 4 in^2
                (1/3)(3.14)(15 in)

Then the radius of the base is sqrt(4 in^2) = 2 in.
7 0
4 years ago
Read 2 more answers
A man's average of daily income from Sunday to Thursday is Rs 75 . If he earns Rs 93 on Friday , find his average income of 6 da
MA_775_DIABLO [31]

Answer:

78

Step-by-step explanation:

Average income from Sunday to Thursday = Rs 75.

There are 5 days .

So average = sum / 5

= sum = 5 average

= sum = 5 × 75

= sum = 375

He earns Rs 93 on Friday .

So adding this sum = Rs 375 + 93

= Rs 468

Average = sum / number of terms

= Average = 468/6

= Average = 78

Hence the average is 78 .

5 0
3 years ago
Find the surface area of the net below.
Hatshy [7]

Answer:

okay so first to find the surface area of the net below you should always start from the line that is pointing at the end of the the i n u m so you see that is between 8 1/8 and 2 so you see the line you draw a line in the middle between 8 and then when you look and then you draw another line were 19 years and then you draw another line so you can see that at the top of 19 and there at the bottom of 918 you see that you can find the Nets below because you can see me you draw your line it shows you Drawing the Line because when you draw a circle in the middle and then you draw a another little circle in the middle is shows the surface area of the net below so bye

5 0
3 years ago
Other questions:
  • I NEED HELP ASAP PLEASE PLOT IT
    8·1 answer
  • A pizza shop charged $49.57 for 3 large pepperoni pizza's. The price included a $2.50 delivery fee
    10·1 answer
  • Janice paints a flat stone red on one side and blue on the other. She tosses the stone 200 times, and it lands red side up 150 o
    15·1 answer
  • Is 3y=-2x+6 proportional or nonpropotional
    8·2 answers
  • Between wich two consecutive whole numbers would 12 be located at?
    9·1 answer
  • QUICKKKKKKKKFor what values of a is the sum of the fractions (2a−1)/4 and (a−1)/3 positive?
    15·1 answer
  • Anita burger purchased 14 gallons of gas for $34.72. How much did she pay for each gallon
    9·1 answer
  • Two friends, Neil and Charlie, are going to depart from their houses and ride their bikes towards each other until they meet, an
    9·1 answer
  • 1. A line goes through the points (4, 5) and (2, -6). Write the equation of the line in point-slope form. Show your work for ful
    6·1 answer
  • Write the equation of the parabola in standard form.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!