Write an equation of the line in slope-intercept form.

Mathematics

1 answer:

Paladinen [302]3 years ago

8 0

Answer:

your answer is correct and it is in slope intercept form because it had no intercept.

Step-by-step explanation:

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Mary and dan went to a bookstore. mary bought 2 notebooks and 3 pens for $14.50. dan bought 1 notebook and 2 pens for $7.50. how

never [62]

Let $n,p$ be the cost, respectively, of a notebook and a pen. If you buy 2 notebooks and 3 pens (which we know is a cost of $14.50), you spend $2n+3p$

Similarly, if you buy 1 notebook and 2 pens (which we know is a cost of $7.50), you spend $n+2p$

These two equations form the following system:

$\begin{cases}2n+3p=14.5\\ n+2p=7.5 \end{cases}$

Multiply the second equation by 2:

$\begin{cases}2n+3p=14.5\\ 2n+4p=15 \end{cases}$

Subtract the first equation from the second:

$2n+4p - (2n+3p) = 15-14.5 \iff p=0.5$

So, a pen costs 0.5 dollars. Plug this equation in the second equation:

$n+2p=7.5 \iff n+2\cdot 0.5=7.5\iff n+1 = 7.5 \iff n=6.5$

8 0

4 years ago

D • (-4) = 32 solve for d

RSB [31]

Answer:

d = -8

Step-by-step explanation:

Isolate the variable, d. Note the equal sign, what you do to one side, you do to the other. Divide -4 from both sides of the equation:

$d * -4 = 32\\\frac{d * -4}{-4} = \frac{32}{-4}\\d = \frac{32}{-4}\\d = -8$

d = -8 is your answer.

7 0

3 years ago

Read 2 more answers

Is (0,-2) a solution of x + y = 6? Click on the correct answer?

goldenfox [79]

Answer:That is not the solution explanation: because if you put the 0 in place of the x in the equation, y would have to equal 6. If you put the -2 in place of the y then x would have to equal 8.
Simpler explanation: 0 + -2 = -2 not 6

6 0

4 years ago

Help i really don’t know how to do this

Lynna [10]

so the answer is of option B.

Hope this will help u....