Adding 0 to any number leaves it unchanged. For example a + 0 = a.

Mathematics

2 answers:

diamong [38]3 years ago

4 0

Answer:

true

Step-by-step explanation:

❤️✨

m_a_m_a [10]3 years ago

4 0

Yep that's correct XD

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Find the discriminant and determine the nature of the roots to the quadratic equation

Katen [24]

№17
$x^{2} +6x-7=0 \\ D=6 ^{2} -4*(-7)=36+28=64=8 ^{2} \\ \\ x_{1} = \frac{-6+8}{2} =1 \\ \\ x_{2} = \frac{-6-8}{2} =-7$
Answer: x₁ = 1
   x₂ = - 7

№18
$2 x^{2} -3x+4=3 \\ 2 x^{2} -3x+4-3=0 \\ 2 x^{2} -3x+1=0 \\ \\ D= -3 ^{2} -4*2=9-8=1 \\ \\ x_{1} = \frac{3+1}{2*2} = \frac{4}{4} =1 \\ \\ x_{2} = \frac{3-1}{2*2} = \frac{2}{4} =0.5$
Answer: x₁ = 1
     x₂ = 0,5.

№19
$2 x^{2} -4x-5=0 \\ D=-4 ^{2} -4*2*(-5)=16+40=56 \\ \\ x_{1}= \frac{4+ \sqrt{56} }{2*2} = \frac{4}{4} + \sqrt{ \frac{56}{16} } =1+ \sqrt{3.5} \\ \\ x_{2} = \frac{4- \sqrt{56} }{2*2} = \frac{4}{4} - \sqrt{ \frac{56}{16} } =1- \sqrt{3.5} 
$
Answer: x₁ = 1 + √3.5
     x₂ = 1 - √3.5

3 0

4 years ago

GPE.2.6

Darina [25.2K]

Answer:

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Step-by-step explanation:

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7 0

3 years ago

3. Which test do you stretch your muscles by reaching for your toes?

VARVARA [1.3K]

Answer:

I think it's sit and reach sorry if I'm wrong

4 0

2 years ago

-3(x+4)+15=6-4y how to do this

Nataly [62]

Multiply -3 to x and get -3x and multiply 4 and -3 and get -12 so then subtract -12 and 15 and get -3 so now it is -3x-3=6-4y so now. You subtract -3 and 6 and get positive 3 so now the final answer is -3x-4y+3

5 0

3 years ago

Write a complete two-column proof for following information:

Fantom [35]

<span>Given:

AB = x + 16

BC = 4x + 11

AC= 77

We can safely assume that,

AB + BC = AC

x + 16 + 4x + 11 = 77

5x + 27 = 77

5x = 77 - 27

5x = 50

x = </span> $\frac{50}{5}$

x = 10

Hence,

AB = x + 16 = 10 + 16 = 26

Hence, proved.

8 0

4 years ago

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