I hope this helps ( there is no negatives )
Answer:
<u>The simplest system:</u>
<u>Solve by eliminating y:</u>
- x² = x
- x(x - 1) = 0
- x₁ = 0
- x₂ = 1
<u>Then the value of y:</u>
<em>The graphical solution is attached </em>
The formula for area of a triangle is A= bh/2
So 8•5/2 is 40/2= 20
Then 13•19/2 is 247/2= 123.5
Answer:
Which of the following is NOT true about a rhombus?
options:
lines of symmetry are the perpendicular bisectors
lines of symmetry are the diagonals
a rhombus has four congruent sides
a rhombus is a quadrilateral
Answer:
Below in bold.
Step-by-step explanation:
The identity is of the form
(a + b)^2 = a^2 + 2ab + b^2.
a) Sqrt 49 = 7 and we need + 28 as the middle coefficient . We get this with
2*7 + 2*7 so the first coefficient is 2*2 = 4.
So * = 4a^2.
(2a + 7)^2 = (2a + 7)(2a + 7) = 4x^2 + 14a + 14a + 49.
b) -6 * -6 = 36 -24 = 2*-6 + 2 *-6 so the last term is 4x^2
c) The middle term must be an 'ab' term.
sqrt 6.25 = 2.5 and sqrt 1/4 = 1/2
So the coefficient of the middle term is 2.5 * 1/2 + 2.5 * 1/2
= 2.5
So the middle term is 2.5ab.
d) The first term will be in b^2.
100 = 10* 10 and we need 2 as a middle term so coefficient of the first term
will be 1/100 or 0.01. as the 2 comes from 0.1 * 10 + 0.01 * 10 and (0.1)^2 = 0.01
So it is 0.01b^2.
