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3 years ago

Can someone help me

Mathematics

1 answer:

borishaifa [10]3 years ago

5 0

Answer:

See explanation for answer.

Step-by-step explanation:

I'm not sure if this correct but I think the answer is the second one.

I hope this helps!

Have a lovely day!

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Determine if the equation 2x=y represents a proportional relationship.

Romashka-Z-Leto [24]

Answer:

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Proportional Relationships

A proportional relationship is one in which two quantities vary directly with each other. We say the variable y varies directly as x if:

y=kx

for some constant k , called the constant of proportionality .

(Some textbooks describe a proportional relationship by saying that " y varies proportionally with x " or that " y is directly proportional to x .")

This means that as x increases, y increases and as x decreases, y decreases-and that the ratio between them always stays the same.

The graph of the proportional relationship equation is a straight line through the origin.

5 0

3 years ago

4. Find the distance between the two points. Round to the nearest tenth if necessary.

Archy [21]

Answer:

Distance = 7.8 units

Step-by-step explanation:

In coordinate geometry, the distance between the 2 points is given by

$Distance = \sqrt{(x1-x2)^{2} + (y1-y2)^{2} }$

where (x1,y1) and (x2,y2) are coordinates of the 2 points.

Above the 2 points given are, (-2,-1) and (3,5).

x1 = -2 , y1 = -1 , x2 = 3, y2 = 5

 $Distance = \sqrt{((-2)-(3))^{2} + ((-1)-(5))^{2} }$ 

 $Distance = \sqrt{61}$ 

Distance = 7.8102 units

To the nearest tenth, Distance = 7.8 units

3 0

3 years ago

Hi, can you please help me answer this direct proportion question?

Oksanka [162]

Answer:

X = 100

Step-by-step explanation:

In proportion questions, they want you to multiply one of the sides by a variable, (i usually represent it with K) and then change the proportion sign to an equal.
This is because proportional means they have a ratio between them, with one side increasing by "k" for each increase in the other side.

Multiply the left by k, so $y = \frac{k}{\sqrt{x} }$
we know that y= 5, for x = 36, so sub this in the equation
$5 = \frac{k}{\sqrt{36} }$
simplify $5 = \frac{k}{6 }$
re-arrange for k, k = 5*6 = 30
now we know k, we can create the real equation, $y = \frac{30}{\sqrt{x} }$
sub in 3 as y
$3 = \frac{30}{\sqrt{x} }$
x = 100

4 0

2 years ago

Whats the error?Jonah says a common denominator for 3/4 and 2/5 is 9.What is Jonahs error?

sammy [17]

In order to get the common denominator when adding fractions or subtracting fractions, you have to make sure that the denominator of the two items are divisible by each other. In this case, 9 is not divisible by any of the given denominators which is 4 and 5. So in this case, the common denominator will have to be 20. 5 x 4 will equal to 20 and you will also multiply 3 x 5 to get the new numerator. After that, you will multiply 2 x 4 to get the new numerator of the other fraction. The new fractions will be 15/20 and 8/20. From there, you can add or subtract

6 0

3 years ago

What is the median of the following number: 40, 49, 62, 56, 68, 39, 50, 61, 54, 44

Karo-lina-s [1.5K]

Answer:

Step-by-step explanation:

39, 40, 44, 49, 50, 54, 56, 61, 62, 68

39, 40, 44, 49, 50, 54, 56, 61, 62, 68

$\frac{50 + 54}{2}$ = $\frac{104}{2}$ = 52

6 0

3 years ago