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4 years ago

Alkali metals, alkaline earth metals, and aluminum all form ions with positive charges equal to

2 answers:

4 0

In the periodic table, the group number or elements belonging to the same column are elements with the same charge relating to the number of valence electrons which can react with other atoms in their outside shells. In this case, the positive charges pertain to B. group number.

Ymorist [56]4 years ago

4 0

Answer: The group number.

The group number in the modern periodic table shows the number of valence electrons (or ions) in the outermost shell of an atom. [The valency is the number of electrons present in the outermost shell that is needed to be eliminated or added from outermost shell of an atom to complete its octate. It is defined for atoms for neutral charges while charge (ions) is defined for charged species].

Therefore, Alkali metals, alkaline earth metals, and aluminum all form ions with positive charges equal to the group number.

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What is the rate of change of y with respect to x for this function?

lilavasa [31]

Answer:

Given the function: y=f(x) = 3x+2

when x=-2 at the beginning of the interval [-2, 5],

then;

y = 3x+2 begins at

y= 3(-2)+2 = -6+2= -4.

and

when x=5 at the end of the interval [-2, 5],

y = 3x+2 ends up at

y= 3(5)+2 = 15+2= 17.

So,

y has changed -4 to 17, which is a change of 17-(-4)= 17+4 = 21

and x has changed from -2 to 5, which is a change of 5-(-2)=5+2=7

So, the average rate of change of y with respect to x over the interval

[-2, 5] is given by ;

Therefore, the average rate of change y with respect to x over the interval is, 3

Step-by-step explanation:

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3 years ago

4E-38 in scientific notation

Roman55 [17]

$4 \times {10}^{ - 38}$

6 0

3 years ago

How do I find the answer?

grin007 [14]

Answer:

Step-by-step explanation:

87*

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2 years ago

Which of the fallowing points are the solution to the equation 3x-4y-8=12. Chose all that apply (0,-5) (4,-2) (8,2) (-16,-17) (-

Virty [35]

Answer:

The solutions for the equation are:

(4,-2) and (-16,-17)

Step-by-step explanation:

Given equation:

$3x-4y-8=12$

Given points:

(0,-5), (4,-2), (8,2), (-16,-17), (-1,-8), (-40,-34)

We will check each point by plugging it in the given equation and see if it satisfies the equation or not.

(0,5)

$3(0)-4(5)-8=12$

$0-20-8=12$

$-28=12$

which is not true. Hence, not a solution.

(4,-2)

$3(4)-4(-2)-8=12$

$12+8-8=12$

$12=12$

which is true. Hence, it is a solution.

(8,2)

$3(8)-4(2)-8=12$

$24-8-8=12$

$24-16=12$

$8=12$

which is not true. Hence, not a solution.

(-16,-17)

$3(-16)-4(-17)-8=12$

$-48+68-8=12$

$20-8=12$

$12=12$

which is true. Hence, it is a solution.

(-1,-8)

$3(-1)-4(-8)-8=12$

$-3+32-8=12$

$21=12$

which is not true. Hence, not a solution.

(-40,-34)

$3(-40)-4(-34)-8=12$

$-120+136-8=12$

$8=12$

which is not true. Hence, not a solution.

6 0

3 years ago

PLSS HELPP WILL GIVE BRAINLIEST PLS ANSWER ALL 3

podryga [215]

Answer:

$\large \boxed{\sf non \ linear, \ non \ linear, \ linear, \ linear}$

Step-by-step explanation:

Write the equations in the form y = mx + b

If the equation contains exponents then it is non-linear, if not then it is linear.

2xy = 3

This graph forms a curve so it is non-linear

y = 1x³ + 5

This equation is non-linear because it contains an exponent

y = x/3

y = 1/3x + 0

This equation is linear ( no exponent(s) )

2y = 1/2x

y = 1/4x + 0

This equation is linear ( no exponent(s) )

5 0

3 years ago