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Elza [17]
2 years ago
7

Find the value of x. 6 14 8 0 21 x = [ ? ] 3x-12

Mathematics
1 answer:
love history [14]2 years ago
4 0

Answer: 7

Step-by-step explanation:

By the angle bisector theorem,

\frac{21}{14}=\frac{3x-12}{6}\\21(6)=14(3x-12)\\126=14(3x-12)\\9=3x-12\\21=3x\\x=\boxed{7}

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Given f(x) = (3x – 12) +2, what is the domain in set notation?
sattari [20]

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Step-by-step explanation:

6 0
4 years ago
Investing $10,000 in a saving account at 5% annual interest compounded semiannually will result in approximately how much money
zmey [24]

Answer:

156250

Step-by-step explanation:

10000(1+.5/2 )^2*10=156250

4 0
3 years ago
The formula for surface area of a cube is SA = 652, where SA is the surface area and s is the
Aliun [14]

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24p^2q^2?

Step-by-step explanation:

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5 0
2 years ago
when Derek planted a tree it was 36 inches tall the tree grew one and one fourth inches per year the tree is now forty four and
djverab [1.8K]
Suppose that the height of the tree is given by exponential growth. This is the given by the form:
y=abˣ
where:
a is the initial value
b is the growth factor
y is the current value
x is the number of years.
From the question:
a=36 in
b=1 1/4=1.25
y=44 3/4=44.75
plugging the values in the equation we get:
44.75=36(1.25ˣ)
solving for x we shall have:
179/144=1.25ˣ
introducing logs
ln(179/144)=x ln 1.25
hence
x=[ln(179/144)]/ln 1.25
x=0.975~ 1 year

Answer: the tree was planted 1 year ago
8 0
4 years ago
A ball is thrown into the air with an initial upward velocity of 48dt/s. Its height h in feet after t seconds is given by the eq
slavikrds [6]

Answer:

Step-by-step explanation:

The equation used to represent the height of the ball, h in feet after t seconds is expressed as

h = -16t^2 + 48t + 4

A) The height of the ball after 2 seconds would be

h = - 16 × 2² + 48 × 2 + 4

h = - 64 + 96 + 4

h = 36 feet

B)The equation is a quadratic equation. The plot of this equation on a graph would give a parabola whose vertex would be equal to the maximum height travelled by the rocket.

The vertex of the parabola is calculated as follows,

Vertex = -b/2a

From the equation,

a = -16

b = 48

Vertex = - - 48/32= 1.5

So the ball will attain maximum height at 1.5 seconds.

C) The maximum height of the ball would be

h = -16 × 1.5² + 48 × 1.5 + 4

h = - 36 + 72 + 4

h = 40 feet

3 0
3 years ago
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