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worty [1.4K]
3 years ago
7

write an equation in point-slope form for the line through the given point with the given slope. (10, –9); m = –2 a. y – 9 = –2(

x – 10) b. y – 10 = –2(x 9) c. y – 9 = –2(x 10) d. y 9 = –2(x – 10)
Mathematics
1 answer:
Bas_tet [7]3 years ago
3 0
Hello,

y+9=(x-10)*(-2)
==>y=-2x+11

Answer D if you put an "+" betheen y and 9 !!!!!!
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How many terms are in the following algebraic expression?
elixir [45]

Answer:

There are 3 terms

Step-by-step explanation:

5x, 3y, and 10 are terms so there are three. Terms a separated by signs (like + or -)

4 0
2 years ago
What is the greatest common factor of 42 and 50
netineya [11]
The GCF of both 42 & 50 is 2.
7 0
3 years ago
I need help solving this
castortr0y [4]

Answer:

x=10

y=25

Step-by-step explanation:

3x-10+5x+30+6x+20=180

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14x=180-40

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x=10

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90-10=4y-20

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6 0
2 years ago
What is the decibel level of the radio with intensity 10−7 watts per square inch? Use a logarithmic model to solve.
BaLLatris [955]

Answer:

D = 50

Step-by-step explanation:

Given

I = 10^{-7}W/m^2 --- Intensity

Required

Determine the decibel level (D)

This is calculated as:

D = 10 * log(\frac{I}{I_n})

Where:

I_n = The threshold intensity

I_n =1 * 10^{-12}W/m^2

So, we have:

D = 10 * log(\frac{I}{I_n})

This gives:

D = 10 * log(\frac{10^{-7}W/m^2}{1 * 10^{-12}W/m^2})

D = 10 * log(\frac{10^{-7}}{10^{-12}})

Apply law of indices

D = 10 * log(10^{-7--12})

D = 10 * log(10^{5})

Apply law of logarithm

loga^b = b\ log(a)

So, we have:

D = 10 * 5 * log(10)

log(10)  =1

So:

D = 10 * 5 *1

D = 50

<em>Hence, the decibel level is 50</em>

7 0
3 years ago
I had 28 tests to mark and finished 54%. How many do I have left
timama [110]

52 tests because you would multiply 28 by 100 then divide by 54. You would get 51.851, but you cannot have and 8th of a test, so you would round up

6 0
3 years ago
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