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3 years ago

PLEASE HELP FOR 48 POINTS PLEASE! show/explain your answer and work

Mathematics

2 answers:

Rasek [7]3 years ago

6 0

Answer:

Step-by-step explanation:

The equation you are looking for must look something like y = k*x

The easiest way to find it is to try 2 points to see if k would be equal in both cases. Do this for each choice.

y = kx
x = 5
y = 1
y = kx
1 = k*5
k = 1/5

y = kx
x = 7
y = 2
2 = k*7
k = 2/7

k is not the same in both case. A is not the answer.

==================

Using the steps above

x = 10
y = -6
k = -6/10 = - 0.6

x = 6
y = -3
k = - 3/6
k = -1/2

B is not the answer.

=====================

x = 3
y = 9
y = kx
9 = k*3
k = 9/3
k = 3

x = 6
y = 18
y = kx
18 = 6k
18/6 = 6/6 k
k = 3

C is the answer

====================

You can try D yourself

pentagon [3]3 years ago

4 0

Answer:

c This is the direct variation

Step-by-step explanation:

The equation for direct variation is y= kx

Solving this for k

y/x =k

So y/x must be a constant

a. 9/3 =3

2/7 does not =3 so this is not a direct variation

b 1/2 = .5

-3/6 = -.5

This is not the same so this is not a direct variation

c. 27/9 =3

18/6 =3

9/3 =3

This is a direct variation with a constant of 3

d 5/-7 = -5/7

1/-3 = -1/3

This is not the same so this is not a direct variation

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3 years ago

2/3*x+3/4=8 what is x

matrenka [14]

Answer: x=10 7/8

Step-by-step explanation:

Subtract 3/4 from both sides. Multiply both sides by 3. Divide both sides by 2 (basically just isolate x on one side of the equal sign).

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3 years ago

The function h(x) = 1/2 (x+3)2 +2. How is the graph of the h(x) translated from the parent graph of a quadratic function, F(x) =

Natali5045456 [20]

For this case, the parent function is given by:
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To graph y = f (x) + k, move the graph of k units up.
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3 years ago

At a production process, the produced items are tested for defects. A defective unit is classified as such with probability 0.9,

Snezhnost [94]

Answer:

We use Baye's theorem: P(A)P(B|A) = P(B)P(A|B)

with (A) being defective and

(B) marked as defective

we have to find P(B) = P(A).P(B|A) + P(¬A)P(B|¬A). .......eq(2)

Since P(A) = 0.1 and P(B|A)=0.9,

P(¬A) = 1 - P(A) = 1 - 0.1 = 0.9

and

P(B|A¬) = 1 - P(¬B|¬A) = 1 - 0.85 = 0.15

put these values in eq(2)

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6 0

3 years ago

Plz help i will mark you brainlist this is due in 5 minutes

pshichka [43]

Answer: -10 degress is colder than -4

so the answer will be: C (-10 < -4)

Step-by-step explanation:

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3 years ago

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