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3 years ago

Plz help me on this guys.........

Mathematics

1 answer:

puteri [66]3 years ago

3 0

Answer:

y = 4x

Step-by-step explanation:

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The pairs of numbers below represent the price of different

Ymorist [56]

Answer:

Option C: 2 books for $14, 5 books for $35

Step-by-step explanation:

A proportional relationship between two quantities would always have a constant of proportionality. Thus,

Constant of proportionality, k = y/x

In this case,

x = quantity of books

y = price

Let's see which pair will have a constant of proportionality:

Option A: 4 books for $24,8 books for $40

24/4 = 6;

40/8 = 5.

No constant of proportionality.

Option B: 5 books for $25, 6 books for $36

25/5 = 5

36/6 = 6

No constant of proportionality.

Option C: 2 books for $14, 5 books for $35

14/2 = 7

35/5 = 7

Constant of proportionality, k = 7.

This pair represents a proportional relationship.

Option D: 3 books for $15, 7 books for $28

15/3 = 5

28/7 = 4

No constant of proportionality.

4 0

3 years ago

If ABC is reflected across the y-axis, what are the coordinates of A?

Anon25 [30]

Answer:

A. (2,5)

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Why does the quadratic formula work all the time

Monica [59]

the quadratic formula work all the time because it is suitable for every equation.

3 0

3 years ago

The shape of the distribution of the time required to get an oil change at a 15-minute oil-change facility is unknown. However,

Mars2501 [29]

Answer:

(a) Probability that a random sample of n = 45 oil changes results in a sample mean time < 10 minutes i=0.0001.

(b) The mean oil-change time is 15.55 minutes.

Step-by-step explanation:

Let us denote the sample mean time as x

From the Then x = mean time = 16.2 minutes

The given standard deviation = 3.4 minutes

The value of n sample size = 45

CHECK THE ATTACHMENT FOR DETAILED EXPLANATION

5 0

4 years ago

going down the river a boat went 13 km/h. going up the river it only 1 km/h. Find the speed of the boat in still water and the s

iris [78.8K]

This question looks really tricky, but it's actually just describing a system of equations. We have the equation for the speed of the boat with the current and the speed of the boat against the current. Call the boat speed b and the current speed c:
$b+c=13$
$b-c=1$

Then
$(b+c)+(b-c)=13+1$
$2b=14$
$b=7$

So the boat's speed is 7 km/h. Find the current's speed by plugging the boat speed back into one of the original equations:
$7+c=13$
$c=6$

The current's speed is 6 km/h.

4 0

3 years ago