2 years ago

:14=15:21lololololol i have to put 20 characters lolol

Mathematics

1 answer:

Lana71 [14]2 years ago

8 0

Answer:

Step-by-step explanation:

x:14=15:21

14/21 = 2/3

Multiply each term by 2/3

15 *2/3 :21*2/3

10:14

The missing number is 10

You might be interested in

Question 3 Unsaved

bazaltina [42]

Answer:

Step-by-step explanation:

DE given is

y''+8y'+15y=0, y(0)=0, y'(0)=1

Take Laplace on the DE

We get

$s^2 Y(s) -sY(0) -y'(0)+8(sY(s)-y(0))+15Y(s) =0\\s^2 Y(s) -s(0) -1+8(sY(s)-0)+15Y(s) =0\\Y(s)(s^2+8s+15)-1=0\\Y(s) = \frac{1}{s^2+8s+15}$

Simplify to get

Y(s) = $\frac{1}{2}[ {\frac{1}{s+3} -\frac{1}{s+5} }]$

Take inverse

$y(t) = \frac{e^{-3t} -e^{-5t}}{2}$

8 0

2 years ago

A black-tailed jackrabbit hops about 7 feet in a single hop how far can a hop in 5 seconds

valkas [14]

The answer for this is 35 you have to multiply 5 by 7 and you will get your answer

4 0

2 years ago

Read 2 more answers

What is the value of x?

andrew11 [14]

Hope this will help you .

answer is 68

given than 2 sides are equal therefor 2 angles are also equal ,

so, angle 1 + angle2 + angleX = 180 [ASP]

2angle1 + angle X = 180
angle x = 150 - [56][2]
angle x = 180-112

ANGLE x = 68 DEGREE
MARK IT BRAINIEST IF IT WAS REALLY HELPFUL.

4 0

3 years ago

The reflection pool is 1 meter deep, 10 meters wide, and 20.5 meters long. What is the volume of the pool

gtnhenbr [62]

Volume = length x width x height
Volume = 1 x 10 x 20.5
Volume = 205 m^3

3 0

3 years ago

Charles wants to determine which car is the fastest. The actual speed of four cars is shown below: Car A B C D Speed (in km/h) 6

marysya [2.9K]

it would be car d because of what the time was on the chart (i did the test and it was correct)

5 0

3 years ago