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Pachacha [2.7K]
3 years ago
7

kims age is twice of her sister when you add to her sisters age you get 3 how old is each sister (a) write an equation that repr

esents thevsituation explain any varible used (b) solve the equation form part a show your work state your solution as a complete sentence
Mathematics
1 answer:
Lina20 [59]3 years ago
6 0
Kim is 2. Her sister is 1 years old. 2+1=3
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The solution system to 3y-2x=-9 and y=-2x+5
Alecsey [184]

Answer:

\boxed{(3,-1)}

Step-by-step explanation:

<em>Hey there!</em>

<em />

Well to find the solution the the given system,

3y - 2x = -9

y = -2x + 5

So to find x lets plug in -2x + 5 for y in 3y - 2x = -9.

3(-2x + 5) - 2x = -9

Distribute

-6x + 15 - 2x = -9

-8x + 15 = -9

-15 to both sides

-8x = -24

Divide -8 to both sides

<u>x = 3</u>

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Now that we have x which is 3, we can plug in 3 for x in y = -2x + 5.

y = -2(3) + 5

y = -6 + 5

<u>y = -1</u>

<u><em /></u>

So the solution is (3,-1).

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<em>Hope this helps :)</em>

4 0
3 years ago
PLEASE CAN ANYONE HWLP WITH THIS QUESTION I NEED HELP ASAP!!!!!!
matrenka [14]

Answer: C.) $51

Step-by-step explanation:

$85.00 x 40%

85.00 x 0.40= 34

85.00-34=51.00

$51

3 0
3 years ago
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A train travels from Washington DC to new york(225 miles). The train departs at 4:55 PM and arrives in New York at 7:55 PM. What
mylen [45]

Answer:

The average speed is:

\var{v}=75\: miles/h

Step-by-step explanation:

The average speed equation is given by:

\var{v}=\frac{\Delta x}{\Delta t}

Were:

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Then we have:

\var{v}=\frac{225}{3}

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I hope it helps you!

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2 years ago
Carter is solving for x by the process of completing the square for the following
Ksenya-84 [330]

Answer:

The number that goes in place of the question mark is 2.

Step-by-step explanation:

Let's solve it!

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First we can factor 3 out of each term:

x² + 4x - 8 = 0

Now we'll add 12 to both sides to complete the square:

x² + 4x + 4 = 12

And finish it off:

(x + 2)² = 12

So the answer to the question is 2

Bonus:

We can also now solve this for x:

(x + 2)² = 12

x = √12 - 2

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OleMash [197]

Answer:

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2 years ago
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