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AlekseyPX
3 years ago
8

Help Plz :)

Mathematics
2 answers:
aliina [53]3 years ago
6 0

Remark

An anion is a charged ion that has taken on electrons. So you are talking about an activity that definitely involves electrons. It would seem reasonable to believe that the increase in the size of an ionic radius is caused by an increase in the number of electrons in the valence (outside) ring. The statement is true.


wel3 years ago
5 0

Answer:

True

Step-by-step explanation:

An anion is a charged ion that has taken on electrons.

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In a triangle, one of the angle measures 70°
Tanya [424]

Answer:

the two angles are 55° each

Step-by-step explanation:

Let the two equal angles be y each

Therefore,

70° + y + y = 180°

Collect like terms

2y = 180 — 70

2y = 110

Divide both side by the coefficient of y i.e 2

y = 110/2

y = 55°

Therefore, the two angles are 55° each

4 0
3 years ago
A ball is thrown from a height of 40 meters with an initial downward velocity of 5 m/s
arsen [322]

0=40-10t-5t^2

t^2+2t-8=0

(t+4)(t-2)=0

t=-4 (not a solution) or t=2

Answer: after 2 seconds

7 0
3 years ago
The graph of a quadratic function has roots at -3 and -7 and a vertex at (-5, 4). What is the equation of the function in vertex
melomori [17]

Answer:

y = -(x + 5)² + 4

Step-by-step explanation:

The roots are -3 and -7, so:

y = a (x + 3) (x + 7)

Distribute and complete the square:

y = a (x² + 10x + 21)

y = a (x² + 10x + 25 − 4)

y = a (x² + 10x + 25) − 4a

y = a (x + 5)² − 4a

The vertex is (-5, 4), so a = -1.

y = -(x + 5)² + 4

3 0
3 years ago
PLEASE HELP!!! Use addition to solve the linear system of equations. Include all of your work in your final answer. 2x + y = 5,
Arturiano [62]
I: 2x+y=5
II:3x+2y=4

start by eliminating y

-2*I: -4x-2y=-10
II: 3x+2y=4

add both equations together

-2*I+II: -4x-2y+3x+2y=-10+4
-1x=-6
x=6

insert x=6 into I:
2*6+y=5
y=5-12
y=-7

so the solution is x=6, y=-7
4 0
3 years ago
Sasa bikes 25 miles everyday for two weeks. how many miles does she bike during this time?
kondor19780726 [428]
After two weeks sasa would have bike a total of 350 miles.
7 0
3 years ago
Read 2 more answers
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