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3 years ago

Bruce recorded how many chocolates hate cach day at Worle last week

Mathematics

1 answer:

Kobotan [32]3 years ago

4 0

If you add them all up then the answer is 19!

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Is (-2, 11) a solution to the following system of equations: y = 2x - 5, y = 4x - 3? Explain.

diamong [38]

Answer:no

Step-by-step explanation:

The answer is (-1,-7)

Y=4x-3

(4x-3)-2x=-5

2x=-2

X=-1

Y=4(-1)-3=

-7

(-1,-7)

6 0

2 years ago

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

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

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

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

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

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

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

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

5 0

3 years ago

Write down an (in)equality which describes the solid ball of radius 3 centered at (7,1,−1). It should have a form like x2+y2+(z−

masya89 [10]

Answer:

$(x-7)^2+(y-1)^2+(z+1)^2-9\le 0$

Step-by-step explanation:

A ball is the solid inside a surface which is a sphere.

The equation of a sphere has the form:

$(x-h)^2+(y-k)^2+(z-s)^2= r^2$

Where (h,k,s) is the center and r is the radius.

When we plug the given center (7,1,-1) and radius 3 we get:

$(x-7)^2+(y-1)^2+(z+1)^2= 3^2$

Then we turn this into an inequality: Since the ball is inside the surface we must use the $\le$ symbol.

$(x-7)^2+(y-1)^2+(z+1)^2\le 9$

Then we just subtract 9 from both sides to get:

$(x-7)^2+(y-1)^2+(z+1)^2-9\le 0$

6 0

3 years ago

What are 2 fractions between 3/5 and 4/5?

jeyben [28]

3/5 = 12/20
4/5 = 16/20

two fractions between 3/5 and 4/5 can be 13/20 and 14/20

hope this helps

6 0

3 years ago

HELPPPPPPP BRAINLIESTTT

ahrayia [7]

Answer:

7n+5 would get u the perimeter because you can add like terms together so I added all the ns to get that- hope that helps you ❣️

Step-by-step explanation:

6 0

3 years ago