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valina [46]
3 years ago
15

For what x-value(s) does sin(x) = -1?

Mathematics
1 answer:
ioda3 years ago
4 0
\sin x=-1\\
x=-\dfrac{\pi}{2}+2n\pi, n\in\mathbb{Z}
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By what percent will a fraction change if its numerator is decreased by 20% and its denominator is decreased by 60%?
Vedmedyk [2.9K]

Answer:

The fraction will increase by 100%

Step-by-step explanation:

Say the fraction is x/y. The question is telling us to decrease x by 20% (i.e. 0.8x) and to decrease y by 60% (i.e. 0.4y):

= \frac{0.8x}{0.4y}\\= 2 (\frac {x}{y})

You can see that by applying these changes, the new fraction is actually double the old fraction (i.e. will increase by 100%).

6 0
3 years ago
Read 2 more answers
Help me please, i need help with all the questions. My teacher did not explain very well
belka [17]
The questions that are 1-6 above:

Use the term
P- Parenthesis
E- Exponents
M-Multiplying
D-Dividing
A- Addition
S-Subtraction
Do the equations from that order doing Parenthesis first, Exponents second, etc.
If there's none of one of the operations, skip to the next one. Remember to solve the equation starting from parenthesis and then going down the order.
Sorry I can't help you with the bottom 1-6 Good luck
8 0
2 years ago
I need help please :)
kumpel [21]
20² = (8 + 8)² + x²
x = 12
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the missing side has a value of 12, found using pythagorean theorem
6 0
3 years ago
Joe is riding his bicycle. He rides for 3 hours at a speed of 4.8 kilometers per hour. For how many kilometers does he ride?
eduard

Answer:

14.4km

Step-by-step explanation:

<h2>Speed = distance / time </h2>
  • speed = 4.8 km/h
  • time = 3 hrs
  • distance = ?

Distance = speed  * time

Distance = 4.8 * 3 = 14.4km

5 0
2 years ago
Solve the following system of equations graphically on the set of axes below Y= -2x - 7 Y= 3x - 2
elixir [45]

Answer:

x=−1 and y=−5

Step-by-step explanation:

hope this helps

3 0
3 years ago
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