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siniylev [52]
3 years ago
8

PLSSSSS HELP ME!!! 80 Points!!

Mathematics
2 answers:
PIT_PIT [208]3 years ago
8 0

Answer: <em> (-1; 3)</em>

Step-by-step explanation:

<em>y = -x + 2</em>

<em>y = 4x + 7</em>

<em />

<em>4x + 7 = -x + 2</em>

<em>4x + 7 + x - 7 = - x + 2 + x - 7</em>

<em>5x = - 5</em>

<em>x = - 1</em>

<em />

<em>y = 4(-1) + 7</em>

<em>y = 3</em>

<em>Intersection point: (-1; 3)</em>

<u><em>See the solution on the photo</em></u>

maks197457 [2]3 years ago
7 0

Answer:

y=−x+2y=4x+7   NO

y=−x+2               YES

y=4x+7            

Multiply the first equation by 4, obtaining:              4y = -4x + 8

Add the 2nd equation to this result:                          y = 4x  + 7

                                                                            --------------------

                                                                                5y = 15, and y = 3

Then, using the first equation, determine x:

y = 3 = -x + 2

      1 = -x, so x = -1

The solution is (-1, 3)

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12-2(n-1)=-18<br><br> aa help plzz
Luda [366]

Answer:

n=16

Step-by-step explanation:

Let's solve your equation step-by-step.

12−2(n−1)=−18

Step 1: Simplify both sides of the equation.

12−2(n−1)=−18

12+(−2)(n)+(−2)(−1)=−18(Distribute)

12+−2n+2=−18

(−2n)+(12+2)=−18(Combine Like Terms)

−2n+14=−18

−2n+14=−18

Step 2: Subtract 14 from both sides.

−2n+14−14=−18−14

−2n=−32

Step 3: Divide both sides by -2.

−2n /−2  =  −32 /−2

n=16

8 0
3 years ago
Can someone please help me
Leno4ka [110]
The bank account owner is withdrawing money at the rate of $50/month.  The account balance is steadily declining.
8 0
4 years ago
A bicycle was originally sold for $400 was on sale for $320. what percent was the bike marked down?
Eva8 [605]
100% of the price = $400
x % of the price = $320
we need to find x

using a proportion
100 : 400 = x : 320
100 * 320 = 400 * x
32000 = 400x
x = 32000 / 400
x = 80

That means the new price is 80% of the previous price.
100% - 80% = 20%
and based on this we can make a conclusion that the discount was 20%

I hope it is clear to you, feel free to ask anything about it :)

6 0
3 years ago
Read 2 more answers
Please help me with this!!! I am very lost and don't know what it means. It is on a computer I have to finish this question PLEA
Lady_Fox [76]
8 kilometers=8000 meters          1.5 kilometers=1500 meters                         500 meters                                    8000+1500+500=10000 meters
4 0
3 years ago
What is the area????
Ad libitum [116K]

Answer:

49.1 cm^2

Step-by-step explanation:

The appropriate area formula is ...

area = (1/2)(side 1)(side 2)(sin(angle between))

= (1/2)(10 cm)(12 cm)·sin(55°) = 60·sin(55°) cm^2

area ≈ 49.1 cm^2

6 0
3 years ago
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