Which expression is equivalent to 1.5a + 2.4 (a + 0.5b) - 0.2b?

Mathematics

2 answers:

Oksana_A [137]2 years ago

8 0

The answer is A, 3.9a + b

Step-by-step explanation:

youre welcome

labwork [276]2 years ago

3 0

A) 3.9a+b hope this helps

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The depth of a scuba diver can be modeled by the equation d 0.5t (3.5t- 28.25), where d is the depth in meters of the diver and

user100 [1]

We know that

using a graph tool
see the attached figure

The diver reaches the surface when d = 0
so
0.5t (3.5t- 28.25)=0---------> the solution is
0.5t=0--------> t=0
and
(3.5t- 28.25)=0----------> 3.5t=28.25--------> t=28.25/3.5--------> t=8.07 minutes


the time it takes for the diver to reach the surface is when the depth is zero
the time is 8 minutes

the answer is
8 minutes

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Which function has a vertex at (2, –9)?

Ivahew [28]

The solutions or roots so-called are really just the x-intercepts, and for a quadratic equation, the vertex is found right half-way between those x-intercepts.

we can get the intercepts by zeroing out "y" or f(x), so let's take a peek at one of those,

$\bf \stackrel{f(x)}{0}=(x-5)(x+1)
\\\\\\
0=x-5\implies \boxed{5=x}\qquad \qquad \qquad \qquad 0=x+1\implies \boxed{-1=x}$

so, the x-intercepts or solutions are at 5 and -1, let's take a peek what's the halfway point.

-1----0----1---- 2 ----3-----4------5

well then, now we know the vertex is at x = 2, but, what's the y-coordinate of it anyway?

y = (x - 5)(x + 1)

y = (2 - 5)(2 + 1)

y = (-3)(3)

y = -9

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The expression 4h−3 factored is

lubasha [3.4K]

Answer:

prime

Step-by-step explanation:

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