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topjm [15]
3 years ago
12

write the equation of the line that is parallel to y = 4x -7 and passes through the point (-2, -5). show your work.​

Mathematics
1 answer:
natita [175]3 years ago
7 0

Answer:

y = 4x + 3

Step-by-step explanation:

To do this, put the new line into the form y = mx + b where m is the slope and b is the y-intercept.

When two lines are parallel, they have the same slope. Since, the slope of the first line is 4, that means the slope of the second line is also 4.

So far, the equation is y = 4x + b.

Then, since you know (-2, -5) is a solution, x = -2, y = -5 is a solution so you can plug this into the equation.

This would be:

-5 = 4 * -2 + b

-5 = -8 + b

3 = b

This means the equation is y = 4x + 3.

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Not sure how to solve this
Hoochie [10]

Answer:

  (x, y) = (0, -14), (2, -8), (3, -5)

Step-by-step explanation:

Put the given values into the equation and solve.

<u>x = 0</u>

  y = 3·0 -14 = -14

<u>y = -8</u>

  -8 = 3x -14

  6 = 3x . . . . . . add 14

  2 = x . . . . . . . divide by 3

<u>x = 3</u>

  y = 3·3 -14 = -5

__

The ordered pairs in your table are ...

  (x, y) = (0, -14), (2, -8), (3, -5)

_____

<em>Comment on the approach</em>

In this problem, you are only asked for one x-value for a given y-value. If there were more, you would solve the equation generically (x = (y+14)/3) and use that to compute the desired values of x.

3 0
4 years ago
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Sue deposited $1,500 into two different accounts.
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$915 I’m pretty sure

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3 years ago
A boy is 6 years older than his sister. In three years time he will be twice her age. What
Masja [62]

Answer:

12 years old

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3 0
3 years ago
Translate this phrase into an algebraic expression.<br> the quotient of 14 and a number
Anna71 [15]

Answer:

Step-by-step explanation:

Let the number be x

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A person invested $200 in an account growing at a rate allowing the money to double every 13 years. How much money would be in t
antiseptic1488 [7]

Answer:

$431

Step-by-step explanation:

Given parameters:

Principal  = $200

Time given for the amount to double  = 13yrs

Unknown:

Amount in the account after 15yrs = ?

Solution:

To solve this problem, we need to find the interest rate on this investment.

    I = \frac{PRT}{100}

I = interest

P = principal

R = Rate

T = time

 Now,

  if the amount should double,

     Interest earned  = $200

So;

         200  = \frac{200 x R x 13}{100}  

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Now, in 15yrs, this amount will be;

 let us find the interest;

           I  = \frac{200 x 7.7 x 15}{100}  

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The amount in the account will be:

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