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2 years ago

I NEED HELP!! NO LINKS OR I WILL REPORT

Mathematics

1 answer:

Rufina [12.5K]2 years ago

7 0

49degrees
60meters
24meters

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Developmental norms are used as a benchmark to determine where one should be developmentally. Please select the best answer from

Sati [7]

Answer:

True

Step-by-step explanation:

ed 2020. I went back to check the answer so 100% right.

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2. 30 minutes to 18 minutes

Gemiola [76]

Ratio: 30:18

If you were asking for the ratio-

Compare: 30 minutes is 12 more minutes than 18

If you were asking which one is grater-

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2 years ago

PLEASE HELP ILL GIVE BRAINLIEST AND THANKS

Natalka [10]

Answer:

Step-by-step explanation:

3y=6x+3

solve by substitution for 3y=6x+3

3y=4x+6

6x+3=4x+6

6x-4x=6-3

2x=3

3y=6x+3 ⇒ y=6x/3 + 3/3 ⇒ y=2x+1

y=2x+1 ( substitute x=3/2)

y=2(3/2)+1

y=3+1

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2 years ago

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zalisa [80]

Answer:

always one of them gotta be ugly

Step-by-step explanation:

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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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2 years ago