3 years ago

Can someone help me with this topic

1 answer:

6 0

You can take the mean of each category (assuming it is evenly distributed) and calculate the mean as (10x4 + 30x3 + 50x2 + 70x1) / (4+3+2+1) = 300/10 = 30

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Pleas someone help me with this it's my last question

ruslelena [56]

Answer:

we need to find out if the following get x = 2 as a final product

-2(x-4) = 4

-2x + 8 = 4

-2x = -4

x = 2

so it is a solution

26/x = 13

26 = 13x

x = 26/13

x = 2

so it’s a solution

-3.8x = -7.4

x = 7.4/3.8 ≠ 2

you get ≈ 1.95

so it’s not a solution

4(x-1) - 3(x-2) = -8

4x - 4 - 3x + 6 = -8

x + 2 = -8

x = -10

so it’s not a solution

5 0

2 years ago

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An office building casts a 90 foot shadow. At the same time of day, a 5 foot woman standing near the building casts an 8 foot sh

Rainbow [258]

The building is about 56 feet tall

8 0

2 years ago

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A raindrop falls at 200m per minute. how long will it take a raindrop to travel 6000m?

Kryger [21]

The first thing you should know is that by definition:
d = v * t
Where
d: distance
v: speed
t: time
We then have to clear the time:
t = (d) / (v)
Substituting the values:
t = (6000) / (200)
t = 30 minutes
Answer:
It will take a raindrop to travel 6000m about:
t = 30 minutes

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3 years ago

A SPHERICAL BALL HAS A DIAMETER OF 8 INCHES.THE BALL HAS A SLOW LEAK IN WHICH AIR ESCAPES AT THE RATE OF 2.5 CUBIC INCHES PER SE

Anit [1.1K]

107.52 seconds for the ball to deflate.

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3 years ago

Find the equation of the axis of symmetry and the coordinates of vertex of the functions =2x^2+4x-3

SVEN [57.7K]

Hello,

Find the equation of the axis of symmetry is like find the maximum or minimum point of this function.

$f(x)=2x^2+4x-3\\\\\alpha=-\dfrac{b}{2a}=-\dfrac{4}{4}=-1\\\\$

The equation of the axis of symmetry is then : $x=-1$

$\beta=f(\alpha)=2(-1)^2+4(-1)-3=2-4-3=-5$

Coordinates of vertex : $(\alpha,\beta)=(-1;-5)$

8 0

3 years ago