A small balloon starts at 7 meters off the

Mathematics

2 answers:

polet [3.4K]4 years ago

8 0

Answer:

x = 5

Step-by-step explanation:

7 + 2.5x = 12 + 1.5x

2.5x - `1.5x = 12 - 7

x = 5

KiRa [710]4 years ago

4 0

Answer:

For this awnser the awnser is x5

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A machine that produces ball bearings has initially been set so that the mean diameter of the bearings it produces is 0.500 inch

natali 33 [55]

Answer:

Step-by-step explanation:

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3 years ago

Given tan of theta = -2 and pi/2; find cos(2theta)

Nata [24]

Given tan of theta = -2 and pi/2; find cos(2theta)
The identity of cos (2 theta)= $cos(2\theta )=\frac{1-tan^2\theta }{1+tan^2\theta }$
Given tan of theta = -2 and pi/2.
So, let's plug in tan theta= -2
$cos(2\theta)= \frac{1-(-2)^2}{1+(-2)^2}$
= $\frac{1-4}{1+4}$ (Squaring)
= $\frac{-3}{5}$ (simplifying)
So, cos ( 2 theta) = -3/5.
Now we can plug in tan theta = π/2
$cos(2\theta)= \frac{1-(π/2)^2}{1+(π/2)^2}$
= $\frac{1-pi^2/4}{1+pi^2/4}$ (Squaring)
= $\frac{4-pi^2}{4+pi^2}$ Simplifying
So, cos ( 2 theta)= -3/5 and (4-pi^2)/(4+pi^2)