Answer:
a 2.68
b 2.01
Step-by-step explanation:
1.34/2 =( 0.67 (F) )
(F)*4 = A
(F)*3 = B
2 solutions. This is because the parabola will cross the x axis twice. We know this because -5 means the vertex will be 5 units below the x axis. and the parabola opens upwards because the first coefficient is positive. Hope this helped :)
If I understand the question correctly, dots are written around the symbol to represent valence electrons, so 7 dots would be in the elements dot diagram. The element is in Group 17 with 4 other elements.
Answer:
It is impossible to have two consecutive integers add up to an even number.
Step-by-step explanation:
x + (x + 1) = 132
2x + 1 = 132
2x = 132
x = 65.5
We can't get two consecutive integers to add up to an even number, as two consecutive integers will always be an odd number and an even number will always add up to an odd number, which 132 is not.
You can of course get two numbers that are 1 apart, and those would be 65.5 and 66.5, but those are not integers.
2 is the lie and 1 and 3 are truths
Step-by-step explanation:
#1 : if you looking for x intercepts make y=0
0=2x^2+4x
0=2(x^2+2x)
Divide both sides by 2
0=x^2+2x
0=x(x+2)
Therefore x=0 or x=-2
1 is true
#2
We can sub in the value to see if it is true
2(-14,70)^2-42(-14.70)=1049,58
Therefore 2 is a lie
#3
we can solve
To find x we make y=0
0=3(x-5)^2-12
0=3(x^2-10x+25)-12
0=3x^2-30x+75-12
0=3x^2-30x+63
0=3(x^2-10x+21)
Divide both sides by 3
x^2-10x+21=0
Factorise
(x-7)(x-3)=0
Therefore x=7 or x=3
Therefore 3 is a truth