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SpyIntel [72]
4 years ago
9

Please answer all the questions w explanations!!

Mathematics
1 answer:
lys-0071 [83]4 years ago
4 0
Answer- 40% not the other numbers
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I need help now plz​
Romashka-Z-Leto [24]

Answer:

C

Step-by-step explanation:

The picture is a bit blurry, but from what i can see, i'd say C (whichever one has -4 x 3 x 1 under the square root.)

So for this, you need to know the quadratic formula, which is:

\frac{-b ± \sqrt{b^{2} -4ac} }{2a}

<em>*ignore the weird capital A, it keeps coming up when i try to use the ± symbol</em>

They have given you the equation of a quadratic, so the first thing you have to do is rearrange it, so that x^{2} comes first.

<u>So now we have the equation: 3</u>x^{2}<u> - 2x +1</u>

*the quadratic formula uses a, b and c, but they are specific. a is always the coefficient of x^{2} , b is always the coefficient of x and c is always the constant (number without an x)

<u>So, i can find that, in this case:</u>

a = 3      b= -2    c=1

<u>Now substitute each of those values it into the original quadratic equation:</u>

<u />

\frac{-(-2) ± \sqrt{(-2)^{2} -4(3)(1)} }{2(3)}

<em>*again, ignore the weird capital A. </em>

That's how you find the answer, which from what i can tell in the picture is C.

Hope that helped : )

6 0
3 years ago
2 divided by 4/5 please help it is due it two minutes please helppppp
S_A_V [24]

Answer: 25/4

Step-by-step explanation:

2 / 4/5 = 2*5/4 = 25/4

To divide fractions, multiply by the reciprocal of the fraction (flip the numerator and denominator, basically)

4 0
3 years ago
Read 2 more answers
What is the complete factorization of the polynomial below?<br> x^3+ 5x^2- x-5
koban [17]

Answer:

(x-1)(x+1)(x+5)

Step-by-step explanation:

x^3+5x^2 - x-5=

x^3-x+5x^2-5=

x(x^2-1) +5(x^2 - 1)=

(x^2- 1)(x+5)=(*)

(x-1)(x+1)(x+5)

(*) A^2 - B^2 =(A-B)(A +B)

7 0
3 years ago
B(7, 2) and C(-1,-9) are the endpoints of a line segment. What is the midpoint M of that line
Oksana_A [137]

Answer:

(3,-3.5)

Step-by-step explanation:

Mid-point formula : \frac{ x_{1} +x_{2}} {2}, \frac{y_{1}+y_{2}  }{2} \\\\x=\frac{7+(-1)}{2}         ,     y=  \frac{2+(-9)}{2} \\x= \frac{6}{2}              ,     y=  \frac{-7}{2} \\x=3                             ,    y= -3.5

Midpoint M of the line segment is (3,-3.5)

4 0
4 years ago
What expression is equivalent to 8x - 2y +x + x​
Arada [10]

Answer:

66

Step-by-step explanation:

3 0
3 years ago
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