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3 years ago

Help 53 points to quickest and correct anwser

Mathematics

2 answers:

Serga [27]3 years ago

7 0

Answer:

First Box: If parallel, alternate interior angles are congruent

Second Box: Definition of congruence

Hope this helps ;)

Step-by-step explanation:

Tju [1.3M]3 years ago

5 0

Answer:

First Box: If parallel, alternate interior angles are congruent

Second Box: Definition of congruence

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The equation (x+2) as a parabola goes through the origin (0,0) but since there is a +2 outside. You move this parabola up 2 on the y-axis

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A package of 4 mechanical pencils comes with 2 free erasers and if you get a total of 12 eraser how many packages of pencils did

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3 years ago

In need of some help! Thank you in advance. 100 points <3

Anni [7]

Answer:

the equation (x-4)^2-17=8 has two solutions because it is in a quadratic form.

(x-4)^2-17=8

x²-8x+16-17-8=0

x²-8x-9=0

Doing middle term factorization

x²-9x+x-9=0

x(x-9)+1(x-9)=0

(x-9)(x+1)=0

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x^2+4x+3=0:

Doing middle term factorization

x²+3x+x+3=0

x(x+3)+1(x+3)=0

(x+3)(x+1)=0

either

x=-3

x=-1

Josh’s solution is incorrect because he missed x=-3.

3.

x^2-6x+7=0

By using quadratic equation formula:

Comparing above equation with ax²+bx+c=0

we get

a=1

b=-6

c=7

Now

we have

x= $\frac{ - b ± \sqrt{ {b}^{2} - 4ac} }{2a}$

x= $\frac{ 6± \sqrt{ {-6}^{2} - 4*1*7} }{2}$

x= $\frac{ 6±2\sqrt{ 2}}{2}$

x= ${ 3±\sqrt{ 2}}$

Taking positive

x= ${ 3+\sqrt{ 2}}$

taking negative

x= ${ 3-\sqrt{ 2}}$

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3 years ago

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So after 2 half lives, there is 1/4 of the sample left, which means 3/4 of the sample decayed.

The answer is 3/4

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4 years ago

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