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3 years ago

I need help please

Mathematics

2 answers:

Paul [167]3 years ago

6 0

Answer:

Step-by-step explanation:

55+71=126

180-126=54

Yuki888 [10]3 years ago

5 0

The answer for this is 54

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HELP ASAP WILL PUT FIRST AS 5 STAR, THANK YOU AND ALSO A BRAINLEIST!!<br><br><br><br>

kifflom [539]

Answer:

17. 13 miles : 1 hour

19. 12 saved : 1 week

21. $0.47 : 1 pound

23. $1.33 : 1 gallon

Step-by-step explanation:

Your goal is to make the second numbers, "1." So divide the first numbers by the second number to simplify.

Ex: 104 ÷ 8 = 13 Therefore, 13 miles per 1 hour (13 miles : 1 hour)

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butalik [34]

Answer:

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Step-by-step explanation:

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2 years ago

Please help me with this math problem

Nitella [24]

Answer:

g(7) = 4

Step-by-step explanation:

The question is what is g(7). So to find that you go on the $x$ axis and go to 7. When you get there, $y$ is 4.

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3 years ago

Find the lcm 15 and 20

Anestetic [448]

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

A 29-meter ladder is sliding down a vertical wall so the distance between the top of the ladder and the ground is decreasing at

vitfil [10]

Complete question

A 29-meter ladder is sliding down a vertical wall so the distance between the top of the ladder and the ground is decreasing at 7 meters per minute. At a certain instant, the bottom of the ladder is 21 meters from the wall.

What is the rate of change of the distance between the bottom of the ladder and the wall at that instant(in meters per minute)

Answer:

$\frac{dx}{dt}=11.94m/min$

Step-by-step explanation:

From the question we are told that

Slant height $z=29m$

Change in Vertical height $\triangle y=7m/s$

Horizontal length $x=21$

Generally in finding the distance form the top to the bottom of the wall it is mathematically given by

$x^2+y^2=z^2$

$21^2+y^2=29^2$

$y^2=29^2+21^2$

$y=35.81$

Generally solving for the differential equation is mathematically represented as

$x^2+y^2=29^2$

$2x*\frac{dx}{dt} +2y*\frac{dy}{dt} =0$

$x*\frac{dx}{dt} +y*\frac{dy}{dt} =0$

$(21)*\frac{dx}{dt} +(35.81)*(-7) =0$

$(21)*\frac{dx}{dt} -250.64 =0$

$\frac{dx}{dt}=\frac{250.64}{21}$

$\frac{dx}{dt}=11.94m/min$

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3 years ago