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Iteru [2.4K]
4 years ago
8

Solve the system by graphing. y=x−22 x+y=1

Mathematics
2 answers:
trapecia [35]4 years ago
6 0

Answer:

C

Step-by-step explanation:

raketka [301]4 years ago
4 0
1.\\y=x-2\\\\for\ x=0\to y=0-2=-2\to(0;-2)\\for\ x=2\to y=2-2=0\to(2;\ 0)\\\\2x+y=1\to y=1-2x\\\\for\ x=0\to y=1-2\cdot0=1\to(0;\ 1)\\for\ x=1\to y=1-2\cdot1=-1\to(1;-1)\\\\Look\ at\ the\ picture.\\\\Answer:\boxed{(1;-1)}\to\fbox{A.}


x^2+x=12\\x^2+x-12=0\\\\a=1;\ b=1;\ c=-12\\\Delta=b^2-4ac\\if\ \Delta \ \textgreater \  0\ then\ x_1=\dfrac{-b-\sqrt\Delta}{2a}\ and\ x_2=\dfrac{-b+\sqrt\Delta}{2a}\\\\\Delta=1^2-4\cdot1\cdot(-12)=1+48=49 \ \textgreater \  0\\\sqrt\Delta=\sqrt{49}=7\\\\x_1=\dfrac{-1-7}{2\cdot1}=\dfrac{-8}{2}=-4\\\\x_2=\dfrac{-1+7}{2\cdot1}=\dfrac{6}{2}=3\\\\Answer:\boxed{-4;\ 3}\to\fbox{A.}


-14+x^2=5x\to x^2-5x-14=0\\\\x^2-7x+2x-14=0\\x(x-7)+2(x-7)=0\\(x-7)(x+2)=0\iff x-7=0\ or\ x+2=0\\x=7\ or\ x=-2\\\\Answer:\boxed{-2;\ 7}\to\fbox{C.}
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A 12-pint bucket of paint costs $51.60. What is the price per quart?
My name is Ann [436]

Answer: $8.60

Step-by-step explanation:

1 pint = 0.5 quart

12 pint = 6

51.6/6 = 8.6

6 0
3 years ago
June is working on an addition problem and starts with 17,985. After she adds she still has 17,985. Which property of addition d
julsineya [31]
U start with 17,985...u add a number and the result is still 17,985. There is only 1 way this can happen and that is if the number u added was 0.

17,985 + 0 = 17,985....this is the additive identity property...which simply states that u can add 0 to a number and it still keeps its identity.
6 0
3 years ago
Read 2 more answers
A Scientist had a bottle that contains 56.6 mL of solution.She used 3.2 mL of the solution for an experiment.She poured half of
mario62 [17]
56.6 - 3.2 = 53.4
53.4 / 2 = 26.7
26.7 - 6 = 20.7ml
For the final answer she has 20.7ml of solution left.

Please mark as brainliest if you can
7 0
3 years ago
Which expression shows the result of applying the distributive property to -2(1/3x - 1/5) ?
Alexeev081 [22]

Answer:

A. -2/3x - 2/5

Step-by-step explanation:

-2 x 1/3x = -2/3x

-2 x 1/5 = 2/5

-2/3x - 2/5

7 0
4 years ago
Solve the systems of equations. <br>​
rewona [7]

Answer:

x = -1 and y = -1

Step-by-step explanation:

Solve 3x+3y=−6;−x+y=0

Steps:

I will solve your system by substitution.

−x+y=0;3x+3y=−6

Step: Solve−x+y=0for y:

−x+y+x=0+x(Add x to both sides)

y=x

Step: Substitutexforyin3x+3y=−6:

3x+3y=−6

3x+3x=−6

6x=−6(Simplify both sides of the equation)

6x

6

=

−6

6

(Divide both sides by 6)

x=−1

Step: Substitute−1forxiny=x:

y=x

y=−1

Answer:

x=−1 and y=−1

8 0
4 years ago
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