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3 years ago

Explian how to tell wherher (2,-1) is a solution of the equation y=3x-2

Mathematics

2 answers:

Kruka [31]3 years ago

8 0

Answer:

It is not a solution

Step-by-step explanation:

You have to substitute (2,-1) into y=3x-2

with 2 as X and -1 as y, if it doens't equal 0 then it's not a solution.

another way is to graph it:

If (2,-1) is a point in your line (y=3x-2), it is a solution

jolli1 [7]3 years ago

4 0

Answer:

it is not a solution

Step-by-step explanation:

You would plug them in

-1=3(2)-2

-1=6-2

-1=4

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The table shows a proportional relationship between the number of stars Roberto collects in a game and his total points. A row o

maks197457 [2]

Answer:

1) 20 stars; 30 points.

2) 28 stars, 42 points.

3) 38 stars, 57 points.

Step-by-step explanation:

<h3> The missing table is attached.</h3>

Let be "x" the numbers of stars Roberto collects and "y" his total points.

The proportional relationship has this form:

$y=kx$

Where "k" is the constant of proportionality.

We can choose the point $(8,12$ ) from the table, where:

$x=8\\y=12$

Substituting these values into $y=kx$ and solving for "k", we get:

$12=k(8)\\\\\frac{12}{8}=k\\\\k=1.5$

Knowing the value of "k", we determine that the following Numbers of stars and the Total points could be used as the missing values in the table:

1) For $x=20$ :

$y=(1.5)(20)=30$

2) For $x=28$ :

$y=(1.5)(28)=42$

3) For $x=38$ :

$y=(1.5)(38)=57$

4 0

3 years ago

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Write an equation for the description.A number x increased by 13 is 116

seropon [69]

Answer:

X+13=116

Step-by-step explanation:

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3 years ago

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Samaria has 6 more than three times as many pieces of candy as Sydney. Samaria has 36 pieces of candy. How many does Sydney have

Vlad1618 [11]

Sam=3syd+6 and sam=36, since sam=sam we can say:

3syd+6=36

3syd=30

syd=10

So Sydney has 10 pieces of candy.

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3 years ago

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Omar has 2-5/8 cups of dough to make dumplings. If he uses 3/16 cup of dough for each dumpling, how many whole dumplings can Oma

Arte-miy333 [17]

Answer:

The number of whole dumpling does Omar make is 14 .

Step-by-step explanation:

Given as :

The number of cups does Omar has to make dumplings = x = 2 $\dfrac{5}{8}$

i.e x = $\dfrac{16 + 5}{8}$

or, x = $\dfrac{21}{8}$

Again

The number of cups uses for each dumpling = y = $\dfrac{3}{16}$

i.e y = $\dfrac{3}{16}$

Let The number of whole dumpling does Omar make = z

So, number of whole dumpling does Omar make = $\dfrac{\textrm number of cups does Omar has to make dumplings}{number of cups uses for each dumpling }$

Or, z = $\dfrac{x}{y}$

Or, z = $\frac{\frac{21}{8}}{\frac{3}{16}}$

Or, z = $\frac{21\times 16}{8\times 3}$

∴ z = 7 × 2

i.e z = 14

So, The number of whole dumpling does Omar make = z = 14

Hence, The number of whole dumpling does Omar make is 14 . Answer

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Sarah bought two t-shirts and one sweatshirt. The t-shirts cost $15.22 each. If Sarah spent a total of $67.94,how many dollars d

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Answer:

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Step-by-step explanation:

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