This is elemantry but the answer comes out radical. what?,,,
Answer:
Below in bold.
Step-by-step explanation:
Vertex form.
y = a(x - h)^2 + k
The point (h, k) is the vertex so from the graph:
y = a(x - 1)^2 - 8
From the x -interesect we see that x = 6 when y = 0 so
0 = a(6 - 1)^2 - 8
25a - 8 = 0
a = 8/25
So the vertex form is
y = (8/25)(x - 1)^2 - 8.
Factored form:
y = (8/25)(x + 4)(x - 6)
- as -4 and 6 are the zeros of the equation.
Standard form:
From the factored form we have
y = (8/25)(x^2 - 2x - 24)
y = 8/25 x^2 - 16/25 x - 192/25
or (in decimal form):
y = 0.32x^2 - 0.64x - 7.68.
Answer:
not lenguague spanish
Step-by-step explanation:
that bad
Answer:
15 cm
Step-by-step explanation:
Adding 5 cm twice increased the perimeter to 70 cm, so it must have been 60 cm to start with.
A square with perimeter 60 cm will have a side length of (60 cm)/4 = 15 cm.
The side of the original square was 15 cm.
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<em>Check</em>
The rectangle is 15 cm by 20 cm, so has a perimeter of 2(15 +20) = 70 cm.