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Feliz [49]
3 years ago
9

Jim gets a weekly allowance he keeps $8 for spending money saves $5 and gives $2 to charity how much is Jim's weekly allowance

Mathematics
1 answer:
olga55 [171]3 years ago
3 0

Step-by-step explanation:

$15

He keeps 8. He saves 5 so 8+5=13

He also gives $2 to charity.

8+5+2= $15

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Calculating cos-1 ( help is gladly appreciated :) )
Alekssandra [29.7K]

Answer:

\frac{3\pi}{4}

(Assuming you want your answer in radians)

If you want the answer in degrees just multiply your answer in radians by \frac{180^\circ}{\pi} giving you:

\frac{3\pi}{4} \cdot \frac{180^\circ}{\pi}=\frac{3(180)}{4}=135^{\circ}.

We can do this since \pi \text{ rad }=180^\circ (half the circumference of the unit circle is equivalent to 180 degree rotation).

Step-by-step explanation:

\cos^{-1}(x) is going to output an angle measurement in [0,\pi].

So we are looking to solve the following equation in that interval:

\cos(x)=-\frac{\sqrt{2}}{2}.

This happens in the second quadrant on the given interval.

The solution to the equation is \frac{3\pi}{4}.

So we are saying that \cos(\frac{3\pi}{4})=\frac{-\sqrt{2}}{2} implies \cos^{-1}(\frac{-\sqrt{2}}{2})=\frac{3\pi}{4} since \frac{3\pi}{4} \in [0,\pi].

Answer is \frac{3\pi}{4}.

4 0
3 years ago
Write it in an algebraic expression form!
Phoenix [80]
1.

(x/2) - 7 = 11


2.

2x + 7 = 27


3.

2x - 5 = 25




Hope this helped!! (:
7 0
2 years ago
The parallelogram has the vertices of A (4,4), B (6,4), C(9,9) and D(7,9) on a coordinate plane. Find the area of the parallelog
Ostrovityanka [42]
7,9 is the closest to it (D)
4 0
3 years ago
How to Find the vertex of f(x)=-8x^2-8x+7
charle [14.2K]

Answer:

The answer to your question is: (1/2, 5)

Step-by-step explanation:

Parabola                     f(x) = 8x² - 8x + 7

                                     y = 8x² - 8x + 7

Vertical Parabola equation

( x - h)² = 4p (y - k)            Transform the original equation to this form

8x² - 8x       = y - 7            

8(x² - x  + (   )²)  = y - 7       Complete squares

8 (x² - x + (1/2)²) = y - 7 + 2    Simplification

8 (x² - x + 1/4) = y - 5

                                 (x - 1/2)² = 1/8 (y - 5)

Finally Vertex

                        (1/2 , 5)

7 0
3 years ago
Which of the following statements is true?
bogdanovich [222]

Answer:

(0,0) is a solution to n=m and n=4m

Step-by-step explanation:

For the first equation, If u insert 0 as m into n=m

n=(0) then n will equal 0.

For the second equation, if u insert 0 as m in n=4m

n=4(0) then n will also equal 0.

So the answer is (0,0) is a solution to n=m and to n=4m

Hope this helps :)

3 0
3 years ago
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