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8_murik_8 [283]
3 years ago
6

50 PONITS! Only help if you know the answer please and thank you!

Mathematics
1 answer:
Ghella [55]3 years ago
6 0

Answer: (-x,y)

Step-by-Step Explanation:

In geometry, when a figure is reflected over particularly the y-axis, one coordinate will change.

The y coordinate will remain the same, not value wise. (positive in your case.)

Wherease the x coordinate will be the opposite additive inverse.

For example if you have (4,3) and it is reflected over the y-axis, the new coordinate will be (-4,y)

Hope this helps! :)

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What is the equation of the line perpendicular to y=3x+2 that passes through the point (0, 2)?
DiKsa [7]
The equation is y = -1/3x + 2.

Point Slope Form : y - y1 = m(x - x1)
Given: (0,2) and y = 3x + 2

When the line is perpendicular, flip the slope upside down and make it into its opposite ( - to +).

Slope: -1/3

y - 2 = -1/3(x - 0)
y - 2 = -1/3x + 0
+ 2 + 2
---------------------------
y = -1/3x + 2
8 0
3 years ago
PLSSS HELLLLLLP????The SAT this year has a mean of 500 and a standard deviation of 50. What percent of students scored between 4
Marta_Voda [28]
The SAT this year has a mean of 500 and a standard deviation of 50.  What percent of students scored between 400 and 600?This is equivalent to a score of 500 ±  2 SD (2 standard deviations)= 0.9545
<span>hopes this helps :) :D :)</span>
8 0
3 years ago
Show that 21^n, n €N can never ends with 0,2,4,6 and 8​
erastovalidia [21]

Answer:

Step-by-step explanation:

21 ^n = (3 \times 7)^n

21 has no 2 in it's prime factorization. So it can never end in 0, 2 , 4 , 6 , 8.

 OR

Odd number raise to any number is always odd, Which does not include 2, 4, 6 , 8.

So 21^n does not end with 0, 2, 4 , 6 , 8.

6 0
3 years ago
Mr. Ratchett, an elderly American, was found murdered in his train compartment on the Orient Express at 7 AM. When his body was
nasty-shy [4]

Answer: Mr. Ratchett died approximately at 2AM.

Step-by-step explanation: <u>Newton's</u> <u>Law</u> <u>of</u> <u>Cooling</u> shows the cooling rate between a body and the environment, by stating that the rate is proportional to the difference in temperatures between them.

Mathematically, it is represented as:

\frac{dQ}{dt}=\alpha.A.(T_{s}-T)

This differential equation solved, gives the solution:

T(t)=T_{s}+(T_{0}-T_{s})e^{-kt}

where

T_{s} is temperature of the environment

T_{0} is the initial temperature of the body

k is a parameter dependent of heat transfer coefficient, heat capacity and area of the body

t is time required to change the temperature

For the murder on the Orient Express, first determine parameter k.

In 1 hour, Mr. Ratchett's body decrease 1°:

27=22+(28-22)e^{-1k}

5=6e^{-k}

e^{-k}=\frac{5}{6}

ln(e^{-k})=ln(0.834)

k = 0.1823

Using the parameter, find estimate time:

28=22+(37-22)e^{-0.1823t}

6=15e^{-0.1823t}

ln(e^{-0.1823t})=ln(0.4)

0.1823t = 0.9163

t=\frac{0.9163}{0.1823}

t ≈ 5 hours

The body was found at 7AM. So, it took approximately 5 hours to cool down to 28° at that time. Therefore, Mr. Ratchett died at 2AM.

5 0
3 years ago
Alpha Mart
seropon [69]

Answer:

answer is gamma mart

Step-by-step explanation:

8 0
3 years ago
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