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mezya [45]
1 year ago
9

Learn with an example Select the tables that show a proportional relationship between x and y. х y 1 4 3 5 2 8 6 10 4 16 12 20 S

ubmit

Mathematics
1 answer:
koban [17]1 year ago
4 0

The green table shows a proportional relationship between x and y

Here, we want to select the table that shows a propoertional relationship between x and y

In the first table, we can establish that by multiplying the x-values by 4, we get the y-values

Thus, we can establish the relationship that;

\begin{gathered} y\text{ = 4x} \\ or \\ x\text{ = }\frac{y}{4} \end{gathered}

The same cannot be said for the second table as we cannot see a relationship between x and y (a proportional relationship)

With respect to this, we can see that it is the first table that shows the proportional relationship

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Wyatt is working two summer jobs, making $8 per hour walking dogs and making $14 per hour tutoring. In a given week, he can work
VLD [36.1K]

Answer:

he spends 7 hours walking a dog and 6 hours tutoring

Step-by-step explanation:

you multiple 8 by 7 and get 56

then multiple 14 by 6 and get 84

you add 6 and 7 together and get 13 hours

you add 56 and 84 together and get 140

3 0
4 years ago
2x+4y+2z= -8<br> 5y-2z= 0<br> 4z= -20
kondaur [170]

Answer:

The given solution for the system is x = 5, y = -2 and z = -5

Step-by-step explanation:

Here, the given set of equations are:

2 x + 4 y +2 z = -8

5 y- 2 z = 0

4 z = -20

Now, simplifying each question one by one ,we get:

Simplifying third equation for the value of z:

4 z = -20 ⇒ z  = -20 / 4 = - 5

or, z =  -5

Simplifying second equation for the value of y:

Substitute the value of z  = -5 in (2) , we get

5 y- 2 z = 0    ⇒ 5 y - 2(-5)  = 0

or, 5 y + 10 = 0

or, 5 y = -10

or, y  =  -10/5 = -2

⇒ y = -2

Simplifying first equation for the value of x:

Substitute the value of z  = -5 and y  = -2 in (1) , we get

2 x + 4 y + 2 z = -8  ⇒ 2 x + 4 (-2) + 2 (-5) = -8

or,  2 x - 8 - 10 = -8

or, 2 x = 10

x = 10 / 2  = 5, or x  = 5

Hence, the given solution for the system is x = 5, y = -2 and z = -5

7 0
3 years ago
Bob has one sister.
Kobotan [32]

Answer:

Bob is 36

sister is 40

Step-by-step explanation:

76-4=72

72/2=36

8 0
4 years ago
Read 2 more answers
AB<br> Round your answer to the nearest hundredth.<br> с<br> A<br> 25°<br> B<br> ( ANSWER? )
Mkey [24]

Answer:

AB = 4/cos25

Put in calculator and put to the nearest hundredth or 2 dp

Step-by-step explanation:

The angle 25 is the starting point and adjacent is 4 and the unknown or we will call it x is the hypotenuse.

We will use CAH

Cos25 = 4/x

We need x by itself so

x = 4/cos25

Put in calculator and put to the nearest hundredth or 2 dp

= ????

5 0
3 years ago
Five times the sum of 9 and some number is 145. What is the number?
Andrews [41]

Answer:

x=20

Step-by-step explanation:

5(x+9) =145 (watch carefully)

5x + 45 = 145

5x + 45 - 45 = 145 - 45

5x = 100

5x/5 (to cancel eachother out) then --> 100/5

x=20

5 0
4 years ago
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