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3 years ago

Can you anser my screen shot

Mathematics

1 answer:

Free_Kalibri [48]3 years ago

5 0

Answer:

13/28 still need to be mowed

Step-by-step explanation:

Least common denominator: 28

1(7)/4(7)=7/28

2(4)/7(4)=8/28

7/28+8/28=15/28

28-15=13

13/28

Hope this helps!

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Use inverse functions where needed to find all solutions of the equation in the interval [0, 2π). (Enter your answers as a comma

Zina [86]

I'm assuming you meant:

$tan^{2}x + tanx - 30 = 0$
Let $u = tan(x)$

Thus, we can rewrite it into a quadratic.

$u^{2} + u - 30 = 0$
$(u + 6)(u - 5) = 0$
$u = -6 or u = 5$

Hence, $tan(x) = -6$ or $tan(x) = 5$
$x = tan^{-1}(-6)$ or $x = tan^{-1}(5)$

Rewriting it in general form, we get:
$x = \pi \cdot n + tan^{-1}(5), n \in Z$
$x = \pi \cdot n - tan^{-1}(6), n \in Z$

From there, you can find your solutions from $[0, 2\pi)$

6 0

4 years ago

An airplane flies 370 miles in 1/2 hour what is its average speed in miles per hour

Sliva [168]

Answer:

740

Step-by-step explanation:

370 miles in 0.5 hours

370/0.5 = 740 miles per hour

6 0

3 years ago

PLEASE HELP WILL MARK BRAINIEST -see attachment-

TiliK225 [7]

Answer:

f(x) and g(x) are inverses

Step-by-step explanation:

* Lets check the inverse function

- If f(x) = y has a domain = x and a range = y, then f^-1 is the

inverse of f with a domain = y and a range = x

- f(x) = f^-1(x) = x

* Now lets solve the problem

∵ f(x) = 8/x

∵ g(x) = 8/x

∴ fg(x) = f(8/x)

∴ fg(x) = 8/(8/x) = 8 ÷ 8/x ⇒ change division sign to the multiplication

sign and reciprocal the fraction after the division sign

∴ fg(x) = 8 × x/8 = x

* Now lets find gf(x)

∴ gf(x) = g(8/x)

∴ gf(x) = 8/(8/x) = 8 ÷ 8/x

∴ gf(x) = 8 × x/8 = x

∵ f(x) = f^-1(x) = x

* fg(x) = gf(x) = x

∴ f(x) and g(x) are inverses

4 0

3 years ago

Consider triangle ABC as pictured below. If B is transformed according to the rule (x,y) --> (x-4,y), then △AB'C will be a __

inessss [21]

Answer:

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Step-by-step explanation:

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49 + 36 = c^2

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3 years ago

Determine the intercepts of the line

PolarNik [594]

Answer:

y-intercept : -7

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Step-by-step explanation:

FOR Y intercept put x =0 in the equation

FOR x intercept put y=0 in the equation!

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3 years ago

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