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2 years ago

The slope of a line that is perpendicular to a line whose slope is -2/7 is

Mathematics

2 answers:

cestrela7 [59]2 years ago

8 0

Answer:

the slope would be 7/2

Step-by-step explanation:

DIA [1.3K]2 years ago

5 0

The slope would be 7/2

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lara [203]

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2 years ago

On a math test, 30 students earned a B. This number is exactly 40% of the total number of students in the class. How many studen

Tju [1.3M]

There are 75 students in the class. 30*100/40=75

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2 years ago

6x − y + z = −3<br> 4x − 3z = −13<br> 2y + 5z = 15<br> Find the solutions?

Alla [95]

Answer:

The solution of the equation are x = - 1 , y = 0 and z = 3

Step-by-step explanation:

Given three linear equation as :

6 x - y + z = - 3 ......A

4 x - 3 z = - 13 ......B

2 y + 5 z = 15 ......C

Solving eq A and C

I.e 2× (6 x - y + z ) = -3 ×2

or, 12 x - 2 y + 2 z = - 6

So, ( 12 x - 2 y + 2 z ) + ( 2 y + 5 z) = - 6 + 15

Or, 12 x + 7 z = 9 ......D

Solving eq B and D

I.e 3 × ( 4 x - 3 z ) = - 13 × 3

or, 12 x - 9 z = - 39

So, ( 12 x + 7 z ) - ( 12 x - 9 z ) = 9 + 39

or, 16 z = 48

∴ z = $\frac{48}{16}$

i.e z = 3

put the value of z in eq D

So, 12 x + 7×3 = 9

Or, 12 x = 9 - 21

or, 12 x = - 12

∴ x = - $\frac{12}{12}$

I.e x = - 1

Now, Put The value of z in eq C

or, 2 y + 5 z = 15

or, 2 y + 5 × 3 = 15

Or, 2 y = 15 - 15

or, 2 y = 0

∴ y = 0

Hence The solution of the equation are x = - 1 , y = 0 and z = 3 Answer

8 0

3 years ago

Graph the relation shown in the table. Is the relation a function? Why or why not?

fiasKO [112]

The answer is D, on a Graph, no two points can meet when drawn Vertically

8 0

2 years ago

PLEASE HELP!!!!!! This season, the probability that the Yankees will win a game is 0.46 and the probability that the Yankees wil

tatuchka [14]

Answer:

Given:

Probability that the Yankees wins a game is

P(A) = 0.46

Probability that the Yankees loses a game is

P(A') = 1 - P(A') = 1 - 0.46 = 0.54

Probability that the Yankees scores 5 or more runs in a game is

P(B) = 0.59

Probability that the Yankees scores fewer than 5 runs in a game is

P(B') = 1 - P(B) = 1 - 0.59 = 0.41

Probability that the Yankees wins and scores 5 or more runs is

P(A⋂B) = 0.39

Applying the De Morgan's law, the probability that the Yankees scores fewer than 5 runs and they loses the game would satisfy:

1 - P(A'⋂B') = P(A) ⋃ P(B) = P(A) + P(B) - P(A⋂B)

1 - P(A'⋂B') = 0.46 + 0.59 - 0.39

1 - P(A'⋂B') = 0.66

=> P(A'⋂B') = 1 - 0.66 = 0.34

Applying the Bayes theorem, the probability that the Yankees would score fewer than 5 runs, given they lose the game:

P(B'|A') = P(A'⋂B')/P(A')

P(B'|A') = 0.34/0.54 = 0.630

Hope this helps!

7 0

3 years ago