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Vika [28.1K]
3 years ago
7

Evaluate ab if a = -16 and b = -5.

Mathematics
1 answer:
Kaylis [27]3 years ago
8 0

9514 1404 393

Answer:

  80

Step-by-step explanation:

ab is the product of 'a' and 'b'. For the given values, that is the product ...

  ab = (-16)(-5) = 80

_____

When the number of minus signs is even, the resulting product is positive.

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Which quadratic function has Vertex (-1,4) and passes through (4,19) <br> HELP
hichkok12 [17]

Answer:

f(x)=\frac{3}{5}(x+1)^2+4

Step-by-step explanation:

The equation of a quadratic function in vertex form is given by:

f(x)=a(x-h)^2+k

Where (h,k) is the vertex.

It was given in the question that the vertex of the parabola is (-1,4).

When we substitute the vertex into the formula we get:

f(x)=a(x+1)^2+4

The parabola also passes through (4,19) hence it must satisfy its equation.

19=a(4+1)^2+4

19-4=a(5)^2

15=25a

We divide both sides by 25 to get:

a=\frac{15}{25}= \frac{3}{5}

Hence the quadratic function is:

f(x)=\frac{3}{5}(x+1)^2+4

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