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3 years ago

Honest answers please. I need to know how to do it.

Mathematics

2 answers:

Evgen [1.6K]3 years ago

8 0

Hi there! The answer is 3 1/3

$- \frac{2}{y} + x {}^{2}$
We fill in our given numbers x = -2 and y = 3

$- \frac{2}{3} + ( - 2) {}^{2} = - \frac{2}{3} + 4 = 3 \frac{1}{3}$

Alexxandr [17]3 years ago

5 0

Just replace y with 3 and x with -2
$- \frac{2}{ 3} + {( - 2)}^{2} \\ - \frac{2}{3} + 4 \\ - \frac{2}{3} + \frac{12}{3} \\ \frac{10}{3}$

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Write an equation for each context. Draw a model first if necessary, and make sure you define your variable and what it represen

Bad White [126]

Answer:

(a)$2248.8

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Step-by-step explanation:

(a) the model can be represented by the nth term of an arithmetic progression

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L= the amount in his account after 6 month; $12484

a= the amount in his account six month before; $1240

n = 6, being the sixth month of his deposit

d = the amount deposited monthly

12484 = 1240 + 5d:

12484-1240 = 5d

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d = 2248.8

(b) let the 1st box contain = x

2nd = 2x; 3rd = x + 2, 4th = 1/4(2x)

Hence; x + 2x + x +2 + 1/4(2x) = 65

4x + x/2 = 65-2

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The 5 players get in all 5 racket + 5 cans since Simon is a member

Therefore, 5r + 5c = 415

But each can cost $4,

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5r = 395 ; r = 395/5

r = $ 79

The racket cost $79 each.

8 0

3 years ago

The graph below shows the rate that water leaves a tank, in gallons per hour, where t is measured in hours. (Please give exact a

defon

Answer:

Part a) 10 gallons

Part b) 4.59 hours

Step-by-step explanation:

<u><em>The picture of the question in the attached figure</em></u>

Part a) How much water left the tank during the 6 hours shown?

To find out how much water left the tank during the 6 hours, determine the area of the graph in that interval

Calculate the area of the rectangle plus the area of the triangle

$(4)(2)+\frac{1}{2}(6-4)(2)$

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Part b) How many hours did it take for 9 gallons to leave the tank?

we know that

In the interval [0,4]

8 gallons of water leaves the tank in 4 hours (remember that the area in that interval is equal to 8 gallons)

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First determine the equation of the line in the interval (4,6)

we have the points (4,2) and (6,0)

The slope is equal to

$m=(6-2)/(0-4)=-1$

The equation of the line is

$y=-(x-6)\\y=-x+6$

Determine the area of graph in the interval (4,x) (Is the area of trapezoid)

$A=\frac{1}{2}(2+(-x+6))((x-4)$

$A=\frac{1}{2}(8-x)((x-4)$

$A=\frac{1}{2}(-x^2+12x-32)\\\\A=-\frac{1}{2}x^{2}+6x-16$

For A=1 gal

$1=-\frac{1}{2}x^{2}+6x-16$

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see the attached figure N 2

3 0

3 years ago

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Oliga [24]

Answer: 0.21

Step-by-step explanation:

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3 years ago

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zalisa [80]

Answer:

Average speed of Aouita = 6.68 meter per second.

Step-by-step explanation:

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He took the time to cover this distance = 7 minutes 29.45 seconds

= (7×60) + 29.45 seconds

= 449.45 seconds

Since, formula for the average speed is given by,

Average speed = $\frac{\text{Total distance covered}}{\text{Total time taken}}$

Therefor, average speed of Aouita = $\frac{3000}{449.45}$

= 6.675

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3 years ago

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4 1

3 years ago

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