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Rom4ik [11]
3 years ago
11

Can some help me, please? ​

Mathematics
1 answer:
kkurt [141]3 years ago
5 0

Since value of k is same for y/x for all values in the table so, y varies directly with x

And equation is: y=-2.25\,x

Step-by-step explanation:

We need to find if y varies directly with x from the values given in the table.

If y varies directly with x then we have the equation:

y=k\,x

where k is constant of proportionality

or we can write

\frac{y}{x}=k

If k is same for all values of x and y when (y/x=k) then we can say that y varies directly with x.

if x = -20 and y=45 then k is:

\frac{45}{-20}=-2.25

So, value of k is -2.25

if x = 1 and y=-2.25 then k is:

\frac{-2.25}{1}=-2.25

So, value of k is -2.25

if x = 12 and y=-27 then k is:

\frac{-27}{12}=-2.25

So, value of k is -2.25

Since value of k is same for y/x for all values in the table so, y varies directly with x

And equation is: y=-2.25\,x

Keywords: Direct Relationship

Learn more about Direct Relationship at:

  • brainly.com/question/10708697
  • brainly.com/question/2678748

#learnwithBrainly

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a stadium with 80 rows has 20 seats in the first rows,30 in the second,and so on.how many total seats are in the stadium​
joja [24]
Answer: there are 2,000 seats in total
5 0
3 years ago
A group of gymnasts were asked to name their favorite piece of equipment. 0.33 of the gymnasts chose the vault,chose the beam, 0
jolli1 [7]

Answer:

beam, vault, uneven bars, floor

Step-by-step explanation:

<u><em>The complete question is</em></u>

A group of gymnasts were asked to name their favorite piece of equipment. 0.33 of the gymnasts chose the vault, 4/9 chose the beam, 0.08 chose the floor exercise, and 1/7 chose the uneven parallel bars. List their choices in order of preference from greatest to least.

step 1

Convert 4/9 and 1/7 to decimals in order to compare with the other values

4/9=0.44

1/7=0.14

step 2

Compare the values

0.44 > 0.33 > 0.14 > 0.08

therefore

The order of preferences from greatest to least is

beam, vault, uneven bars, floor

5 0
3 years ago
Two lines, A and B, are represented by the equations given below:
SashulF [63]
Given:
Line A: 2x +  2y = 8
Line B:    x + y = 4

x = 4 - y
2(4-y) + 2y = 8
8 - 2y + 2y = 0
0 = -8

y = 4 - x
2x + 2(4-x) = 8
2x + 8 - 2x = 8
0 = 0

There is no solution.
4 0
3 years ago
Write the first four terms of the sequence:<br> a = 2<br> an = a(n-1) + 4
eduard

We have sequence equation a_n=a(n-1)+4.

In this case n is a natural number (1, 2, 3, ...).

So start inserting and computing value of a_n given that you know the value of n and a.

a_1=2(1-1)+4=4 (first term)

a_2=2(2-1)+4=6 \\a_3=2(3-1)+4=8 \\a_4=2(4-1)+4=10

Hope this helps.

3 0
3 years ago
Solve please I don’t know how to do this.
nadya68 [22]

Answer:

n=40

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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