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Liula [17]
3 years ago
15

What is the y intercept y=3–4x choose 1 answer

Mathematics
1 answer:
Phoenix [80]3 years ago
4 0

Answer:

3

Step-by-step explanation:

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Answer:

x=40

Step-by-step explanation:

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30 PTS Why is the development of small motor skills so important during the preschool years?
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4 years ago
7 is subtracted from a number y. Then the result is multiplied by 3. The final answer is equal to 12.
Lana71 [14]

Step-by-step explanation:

\bull \:  \bf \: the \: equation \: is \\  \sf \hookrightarrow \: 3(y - 4) = 12 \\  \sf \hookrightarrow \: 3y - 12 = 12 \\  \sf \hookrightarrow \: 3y  = 12 + 12 \\  \sf \hookrightarrow \: 3y = 24 \\  \sf \hookrightarrow \: y =  \frac{24}{3}  \\  \sf \hookrightarrow \: y = 8

4 0
3 years ago
The line AB has midpoint (-2, 4).<br>A has coordinates (3,-2).<br>Find the coordinates of B.​
worty [1.4K]

Answer: B(8, -8 )

Step-by-step explanation: The formula for calculating mid - point between two points is given as :

M = ( \frac{x_{1}+x_{2}}{2} , \frac{y_{1}+y_{2}}{2} )

The mid point has been given from the question .

x_{1} = -2

x_{2} = ?

y_{1} = 4

y_{2} = ?

substituting into the formula , we have

(3 , - 2 ) = (\frac{-2+x_{2}}{2} , \frac{4+y_{2}}{2} )

Equating x -component to x and y component to y , we have

3 = \frac{-2+x_{2}}{2}

cross multiplying , we have

6 = -2 + x_{2}

Therefore:

x_{2} = 8

Also , equating y component to y , we have

-2 = \frac{4+y_{2}}{2}

-4 = 4 + y_{2}

y_{2} = -8

Therefore :

x_{2}  = 8

y_{2}  = -8

check

-2 + 8 / 2 = 3 and

-8 + 4 / 2 = -2

4 0
4 years ago
Initially 100 milligrams of a radioactive substance was present. After 8 hours the mass had decreased by 2%. If the rate of deca
4vir4ik [10]

Answer:

The half life of the radioactive substance is 277 hours.

Step-by-step explanation:

initial mass, No = 100 mg

mass decayed = 2% = 2 mg

Mass remained , N = 98 mg

time, t = 8 hours

Let the half life is T.

Use the equation of radioactivity

N = No\times e^{\frac{-0.693 t}{T}}\\\\98 = 100 \times e^{\frac{-0.693\times 8}{T}}\\\\0.98 = e^{\frac{-5.54}{T}}\\\\ln 0.98 = -\frac{5.54}{T}\\\\-0.02= -\frac{5.54}{T}\\\\T =  277 hours  

5 0
3 years ago
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