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3 years ago

Simplify negative 2 over 3 ÷ negative 7 over 4.

Mathematics

2 answers:

romanna [79]3 years ago

8 0

The answer is B) -8/21

Ber [7]3 years ago

5 0

Answer:

B 8/21

Step-by-step explanation:

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If the values of the supplementary angles are 40 and 2x, what is the value of x? ANSWER QUICKLY PLS!

Zolol [24]

Answer:

140°

Step-by-step explanation:

The value of supplement is 40 and X. We know that the sum of the sumplementary angles is 180. Therefore ,

=> x + 40° = 180°

=> x = 180° - 40°

=> x = 140°

<h3>Hence the value of x is 140° .</h3>

8 0

3 years ago

The space shuttle releases a space telescope into orbit

sergey [27]

Answer: $68 m/s^{2}$

Step-by-step explanation:

The acceleration $a$ of the satellite can be calculated by the following equation:

$V_{f}=V_{o}+at$

Where:

$V_{f}=1700 m/s$ is the final speed of the satellite

$V_{o}=0$ is the initial speed of the satellite (it was "stationary" before the release)

$t=25 s$ is the time

Isolating $a$ :

$a=\frac{V_{f}}{t}$

$a=\frac{1700 m/s}{25 s}$

Finally:

$a=68 m/s^{2}$

4 0

3 years ago

If sin(x) = 0.28, what is cos(90° - x)

vlabodo [156]

$\bf \textit{Cofunction Identities}
\\\\
sin\left(\frac{\pi}{2}-\theta\right)=cos(\theta)
\qquad 
cos\left(\frac{\pi}{2}-\theta\right)=sin(\theta)
\\\\\\
tan\left(\frac{\pi}{2}-\theta\right)=cot(\theta)\qquad 
cot\left(\frac{\pi}{2}-\theta\right)=tan(\theta)
\\\\\\
sec\left(\frac{\pi}{2}-\theta\right)=csc(\theta)\qquad 
csc\left(\frac{\pi}{2}-\theta\right)=sec(\theta)$

therefore, sin(x) = cos(90° - x).

5 0

3 years ago

Which graph represent the equation y=-2

pychu [463]

Answer:

The top left graph.

Step-by-step explanation:

That is because it goes through y=-2

7 0

3 years ago

An animal shelter spends $5.00 per day to care for each bird and $7.50 per day to care for each cat. Jayden noticed that the she

Vilka [71]

Answer:

24 birds

Step-by-step explanation:

Let b represent the number of birds at the shelter on Wednesday. Then the cost of care for the 41 animals is ...

5b +7.5(41 -b) = 247.50

-2.5b +307.50 = 247.50 . . . . . simplify

-2.5b = -60 . . . . . . . . . . . . . . . . subtract 307.50

b = 24 . . . . . . . . . divide by -2.5

The number of birds at the shelter on Wednesday was 24.

7 0

3 years ago