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3 years ago

15

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1 answer:

Bas_tet [7]3 years ago

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Samuel orders DVD’s from an online music store. Each DVD costs $9.99. He has a 20% discount code, and sales tax is 6.75%. What i

ludmilkaskok [199]

Hey You!

Let's solve this step-by-step:

9.99 * 20% = 1.998

9.99 - 1.998 = 7.992

7.992 * 6.75% = 0.53946

7.992 + 0.53946 = 8.53746

The total cost of his order is $8.53

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3 years ago

Solve: negative 1 over 2 x + 3 = −x + 7

nexus9112 [7]

Answer:

Assuming what you meant was $\frac{1}{2}x + 3 = -x +7$ , the answer would be x = 8

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3 years ago

Find the slope intercept form

kherson [118]

fir the x missing think is 11 and for the other f(×) is 24

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3 years ago

One positive number is 9 more than twice another. If their product is 95, find the numbers.

mafiozo [28]

Answer:

The numbers are 19 and 5

Step-by-step explanation:

Given

Let the numbers be $x\ and\ y.$

So:

$x = 9 + 2y$ --- First statement

$x*y = 95$ --- second statement

Required

Find x and y

Substitute $x = 9 + 2y$ in $x*y = 95$

$(9 + 2y) * y = 95$

$9y + 2y^2 = 95$

Rewrite as:

$2y^2 + 9y - 95 = 0$

Expand

$2y^2 -10y +19y- 95 = 0$

Factorize

$2y(y -5) +19(y- 5) = 0$

$(2y +19)(y- 5) = 0$

Solve for y

$2y + 19 =0$ or $y - 5 = 0$

$2y = -19$ or $y = 5$

$y = -\frac{19}{2}$ or $y=5$

Since the numbers are positive, we take only:

$y=5$

Substitute $y=5$ in $x = 9 + 2y$

$x = 9 + 2 * 5$

$x = 9 + 10$

$x = 19$

<em>The numbers are 19 and 5</em>

5 0

3 years ago

-[x-2]=x+2 please help

ELEN [110]

-(x-2) = x + 2
- x + 2 = x + 2
2x = 0
x = 0

i am a mathematics teacher. if anything to ask please pm me

5 0

3 years ago