3 years ago

BRAINLIEST if right!

Mathematics

1 answer:

murzikaleks [220]3 years ago

7 0

V = PI x r^2 x h/3

v = 3.14 x 4.5^2 x 12/3
v = 3.14 x 20.25 x 4
v = 254.34

Answer = 254 in^3

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Z over 2 equal 6 what does z equal to

Advocard [28]

Answer:

Step-by-step explanation:

$\dfrac{z}{2}=6\qquad\text{multiply both sides by 2}\\\\2\!\!\!\!\diagup\cdot\dfrac{z}{2\!\!\!\!\diagup}=2\cdot6\qquad\text{cancel 2}\\\\z=12$

7 0

3 years ago

50 points!!!! Will give brainliest , thanks ,and 5 star rating to the good answers to this questions! please Help! Show all work

densk [106]

Answer:

1) x ≤ 2 or x ≥ 5

2) -6 < x < 2

Step-by-step explanation:

1) We have x^2 - 7x + 10, so let's factor this as if this were a regular equation:

x^2 - 7x + 10 = (x - 2)(x - 5)

So, we now have (x - 2)(x - 5) ≥ 0

Let's imagine this as a graph (see attachment). Notice that the only place that is above the number line is considered greater than 0, and that's when x ≤ 2 or x ≥ 5 (the shaded region).

2) Again, we have x^2 + 4x - 12, so factor this as if this were a regular equation:

x^2 + 4x - 12 = (x + 6)(x - 2)

So now we have (x + 6)(x - 2) < 0

Now imagine this as a graph again (see second attachment). Notice that the only place that is below 0 (< 0) is when -6 < x < 2 (the shaded region).

Hope this helps!