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3 years ago

On which of the following lines does the point (–3, –1) lie? y = −4x − 6 y = 3x + 9 y = −3x − 10 y = 5x − 1

Mathematics

1 answer:

Nesterboy [21]3 years ago

7 0

Answer: $y = -3x - 10$

Step-by-step explanation:

You can substitute the value "-3" for x and "-1" for y in each of the equations given. Whichever equation is correct when simplified is the line that the point (-3, -1) lies on:

$-1 = -4(-3)-6\\\\-1=3(-3)+9\\\\-1=-3(-3)-10\\\\-1=5(-3)-1$

Simplifying the right side of each equation:

First equation: -1 = 6

Second equation: -1 = 0

Third equation: -1 = -1

Fourth equation: -1 = -16

The correct answer is " $y = -3x - 10$ ".

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$7d+3$ Explanation

to solve this we need to translate into math terms, so

Step 1

a) let d represents the number of dimes

let n represents the number of nickles

re write the expressions

$\begin{gathered} number\text{ of dimes=d} \\ seven\text{ times the number of dimes = 7d} \\ \end{gathered}$

The number of nickels is three more than seven times the number of dimes in other words you have to add 7 to seven times the number of dimes to obtain the number of nickles

hence

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therefore , the expression for the number of nickles is

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