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3 years ago

The point (-1,-4) is on the line given by which equation below ?

Mathematics

2 answers:

hammer [34]3 years ago

8 0

Answer:

Step-by-step explanation:

To determine which line the point lies on , substitute the x-coordinate into the equation and if the value of y corresponds to the y-coordinate then the point lies on the line

y = x - 4 = - 1 - 4 = - 5 ⇒ point does not lie on the line

y = - 4x = - 4 × - 1 = 4 ⇒ point does not lie on the line

y = x + 4 = - 1 + 4 = 3 ⇒ point does not lie on the line

y = 4x = 4 × - 1 = - 4 ⇒ point lies on the line

Vlad1618 [11]3 years ago

4 0

Answer:

D. y = 4x

Step-by-step explanation:

y = 4x

Plug in The point (-1,-4) into the equation

when x = -1, y = 4(-1) = -4

So (-1,-4) is the solution of y = 4x

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the Hamilton eighth-grader took a trip to Myrtle beach. They drove a speed of 60 miles per hour. The trip was 570 miles. Write a

Simora [160]

Answer:

9.5

Step-by-step explanation:

$60h = 570$

Divide 60 by both sides

$h = 9.5$

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3 years ago

Evaluate 6h + 20 - 3 if h = 3

8_murik_8 [283]

Answer:

Step-by-step explanation:

6(3)=18

18+20=38

38-3=35

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3 years ago

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Suppose I have an urn with 9 balls: 4 green, 3 yellow and 2 white ones. I draw a ball from the urn repeatedly with replacement.

Mrrafil [7]

Answer:

$E(X_n)=\frac{2(n-1)}{27}$

$E(y)=\frac{14}{9}$

Step-by-step explanation:

From the question we are told that:

Sample size n=9

Number of Green $g=4$

Number of yellow $y=4$

Number of white $w=4$

Probability of Green Followed by yellow P(GY) ball

$P(GY)=\frac{4}{9}*\frac{3}{9}$

$P(GY)=\frac{4}{27}$

Generally the equations for when n is even is mathematically given by

$Probability of success P(S)=\frac{4}{27}$

$Probability of Failure P(F)=\frac{27-4}{27}$

$Probability of Failure P(F)=\frac{23}{27}$

Therefore

$E(X_n)=\frac{n}{2}*P$

$E(X_n)=\frac{n}{2}*\frac{4}{27}$

$E(X_n)=\frac{2n}{27}$

Generally the equations for when n is odd is mathematically given by

$\frac{n-1}{2}$

$E(X_n)=\frac{n-1}{2}*\frac{4}{27}$

$E(X_n)=\frac{2(n-1)}{27}$

Probability of drawing white ball

$P(w)=\frac{2}{9}$

Therefore

$E(w)=\frac{1}{p}$

$E(w)=\frac{1}{\frac{2}{9}}$

$E(w)=\frac{9}{2}$

Therefore

$E(y)=[E(w)-1]\frac{4}{9}$

$E(y)=[\frac{9}{2}-1]\frac{4}{9}$

$E(y)=\frac{14}{9}$

5 0

3 years ago

2(a-7)=a+4<br> 15 6<br>PLS HELPPPPPPPPPPP

muminat

Answer:

a = 18

Step-by-step explanation:

2(a-7)=a+4

Distribute 2 into left side: 2a -14 = a + 4

subtract a from both sides 2a-a-14 = a+4-a

Simplify: a - 14 = 4

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Simplify: a = 18

If wanted, plug a into original to double check work:

plug in: 2 (18-7) = 18+4

do parenthesis first: 2 (11) = 18+4

do multiplication : 22 = 18+4

additions: 22 =22

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3 years ago

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What is the value of for x = 2 and y = –4?

Nata [24]

The answer or value to this question will be D

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3 years ago