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2 years ago

What is the value of the digit 4 in the number 84230

Mathematics

2 answers:

Ratling [72]2 years ago

8 0

The value of the digit 4 is worth 4,000 in the number 84,230.

olganol [36]2 years ago

5 0

The value of the digit 4 in the number 84230 is 4,000.

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Solve the following equation for all values of x: 10x^2 - 5x = 0

kirill115 [55]

Using the quadratic formula works but if you know there are 2 answers (highest power of problem tells you how many solutions) then
10x^2 = 5x
So either x = 0, giving 0=0. Or divide by 5x
2x = 1
x = 0.5

8 0

2 years ago

15% of 20 is ____ find the percentage of the number

Aliun [14]

The answer is 3, just do 20*0.15 (covert 15% into a decimal).

6 0

2 years ago

Read 2 more answers

21 POINTS!! Thank you so much!! There’s also things on my page worth lots points points as well! So if you could help with those

Art [367]

Answer:

Second one

third one

fifth one

last one

Step-by-step explanation:

Based on the x intercepts we can write

a(x+1)(x-5)

where a is some constant

solve for a by plugging in some coordinates

let's plug in (1,-8)

-8=a(1+1)(1-5)

-8= -8a

a=1

therefore the quadratic is (x+1)(x-5)

expand this

x²-4x-5

To find out where something is decreasing/increasing it's easiest to take the first derivative

x²-4x-5= 2x-4

set this equal to 0

2x-4=0

2x=4

x=2

Which means that our two intervals are

(-∞,2)U(2,∞)

plug in any values in the intervals to see whether or not the function is increasing/decreation

Let's plug in 0 for (-∞,2)

2(0)-4

-4

It's negative so it's decreasing on this interval

DO the same thing with the other one

let's plug in x=3

2(3)-4

this is positive so it's increasing on this interval

Go back to the critical value of x=2 and plug this into the equation to find the max/min

(2+1)(x-5)= -9

This is a minimum because the cofeccient for the degree is positive

For the limit one notice that we have a positive, even degree which means the end behavior is positive, positive

what this means is as x approaches negative infinity it's infinity

and as x approaches infinity it's infinity

6 0

2 years ago

How far, D, does a vehicle travel if it is moving at a rate, r, of 60 km/h and it travels for t =150 minutes? Use the formula D=

strojnjashka [21]

The distance of a vehicle travel is 150 km, at a moving rate of 60 km/h for 150 minutes.

Step-by-step explanation:

The given is,

Moving rate, r = 60 km/h

Time, t = 150 minutes

Step:1

We need to find the distance traveled by the vehicle,

From given the formula is

D = rt

Where,

D = Distance in Km

r = Moving rate in Km/h

t = Time in hours

Step:2

We need to convert the time minutes to hours

t = $\frac{150}{60}$ hours

t = 2.5 hours

Step:3

Distance traveled by the vehicle is,

D = 60 × 2.5

= 150

D = 150 Km

Result:

The distance traveled by the vehicle is 150 Km at a moving rate of 60 km/h for 150 minutes.

5 0

3 years ago

Three workers arrive at work 15 minutes late at a cost of $11.00/hour

const2013 [10]

The answer is 2.75 dollars cz 11 dollars divided by 60 mins is .18 so 18 cents x 15 mins is 2.75

hope i helped u enough <span />

6 0

2 years ago