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I am Lyosha [343]
3 years ago
7

The three walls of Jane's bedroom each measure 8ft by 16ft. The are two windows each measuring 2.5 ft by 4 ft. Jane needs to kno

w how many square feet she needs to cover so she can go to the store and by the right amount of paint. What's the exact square footage that needs to be painted?
Mathematics
1 answer:
Oliga [24]3 years ago
8 0

Answer:

-10

Step-by-step explanation:

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2x+3y=1 and y=-2 - 9 solve using linear combination method. Please explain steps.
kaheart [24]

Answer:

x=17

Step-by-step explanation:

2x+3y=1

y=-2-9

  • In order to combine these two equations, an idea you need to keep in mind is finding a way of setting these equations as equal to each other. I saw that each equation shared a common value, y. In this case, we need to isolate y in the first equation so that both equations =y.

2x+3y=1

3y=-2x+1

\frac{3y}{3}=\frac{-2x+1}{3}

y=-\frac{2}{3}x+\frac{1}{3}

  • With this, we now know that both -2-9 and -\frac{2}{3}x+\frac{1}{3} are equal to y, so we can set them equal to each other.

y=-\frac{2}{3}x+\frac{1}{3}

y=-11

-\frac{2}{3}x+\frac{1}{3}=-11

  • Reply to this if anything I'm saying or doing is confusing in any way, or if you find a mistake. :) Solve for x.

-\frac{2}{3}x+\frac{1}{3}=-11

-\frac{2}{3}x=-11-\frac{1}{3}

-\frac{2}{3}x =-\frac{33}{3}-\frac{1}{3}

-\frac{2}{3}x =-\frac{34}{3}

-\frac{2}{3}x(-\frac{3}{2})=-\frac{34}{3}(-\frac{3}{2})

x=\frac{102}{6}=17

x=17

  • Hopefully this answer is correct AND makes sense in terms of how I achieved it. Again, reply to this with any questions or mistakes I made and I'll do my best to answer or fix them.

 

4 0
3 years ago
If f(x) = e^[3ln(x^2)], then f'(x) = ?
kherson [118]
You might need to give out the choices, if there are any. thanks for asking.
8 0
3 years ago
Read 2 more answers
Someone help me . what’s the infinite solution or just what it says help please make sure right .
Gala2k [10]

Answer:

yes it is right

Step-by-step explanation:

3 0
3 years ago
-5+14x+12=-91<br><br><br> with work plz
Alex777 [14]
14x+7=-91
-7=-91-7
14x=-98
*14 *14
x= -1372
4 0
3 years ago
A standard deck of 52 cards has an additional card—a joker—added to it, making the total number of cards in the deck 53. a singl
Tom [10]
53 cards in total....2 black kings

P(picking a black king) = 2/53 = 0.037 = 3.7%
8 0
3 years ago
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