1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
harina [27]
3 years ago
14

1 What is the solution to the system of equations?

Mathematics
1 answer:
WARRIOR [948]3 years ago
4 0
1. The answer is B (4, -1)
2. The answer is B (-2, 5)
You might be interested in
(10 POINTS) find the lengths of segments AD and BD
enyata [817]
26 for ad and bd 13 I believe
7 0
3 years ago
Evaluate the integral using the indicated trigonometric substitution. (use c for the constant of integration.) x^3 / sqrt x^2 +
slava [35]
\displaystyle\int\frac{x^3}{\sqrt{x^2+49}}\,\mathrm dx

Taking x=7\tan\theta gives \mathrm dx=7\sec^2\theta\,\mathrm d\theta, so that the integral becomes

\displaystyle\int\frac{(7\tan\theta)^3}{\sqrt{(7\tan\theta)^2+49}}(7\sec^2\theta)\,\mathrm d\theta
=\displaystyle7^4\int\frac{\tan^3\theta\sec^3\theta}{\sqrt{49\tan^2\theta+49}}\,\mathrm d\theta
=\displaystyle7^3\int\frac{\tan^3\theta\sec^3\theta}{\sqrt{\tan^2\theta+1}}\,\mathrm d\theta
=\displaystyle7^3\int\frac{\tan^3\theta\sec^3\theta}{\sqrt{\sec^2\theta}}\,\mathrm d\theta
=\displaystyle7^3\int\frac{\tan^3\theta\sec^3\theta}{|\sec\theta|}\,\mathrm d\theta

When \sec\theta>0, we have

=\displaystyle7^3\int\frac{\tan^3\theta\sec^3\theta}{\sec\theta}\,\mathrm d\theta
=\displaystyle7^3\int\tan^3\theta\sec^2\theta\,\mathrm d\theta

and from here we can substitute u=\tan\theta to proceed from here.

Quick note: When we set x=7\tan\theta, we are implicitly enforcing -\dfrac\pi2 just so that the substitution can be undone later via \theta=\tan^{-1}\dfrac x7. But note that over this domain, we automatically guarantee that \sec\theta>0, so the absolute value bars can be dropped immediately.
6 0
3 years ago
On a certain day, $1 is worth 30.23 Russian rubles. Omar has $75. How many rubles will he get in exchange?
STatiana [176]
The answer is $2267.25
30.23*75=2267.25
8 0
3 years ago
Why can you use the constant of proportionality with any representation?
pantera1 [17]

Answer:

  1. The number k is called the constant of proportionality. One important way of thinking about this constant k is that it tells us how much y increases by if we increase x by exactly 1. to express that y is directly proportional to x.
3 0
3 years ago
In order to determine Velocity, we need to know.. *
Gennadij [26K]

Answer:

All of the above.

Step-by-step explanation:

The way to calculate velocity is d/t, the displacement over time of travel. Hence, both of those are needed.

Finally, velocity also needs to know your direction, like 5 m/s East for example. Hence, all of the above are needed.

Hope this helped!

7 0
3 years ago
Other questions:
  • 13 teams of cheerleaders. what is the probability that your team performs first and your friend's team performs second
    10·1 answer
  • In the sequence 1, 2, 4, 8, 16, 32, . . . , each term after the first is twice the previous term. What is the sum of the 16th, 1
    9·1 answer
  • Please help! I will thank and rate the best answer. Ten points! I am stuck on this question:
    13·1 answer
  • 3. To divide by a fraction, you must first ?<br> the divisor and then change division to ?
    10·1 answer
  • Evaluate the expression 5(7-4)^2/3+11
    11·2 answers
  • 0.5x=0.3x-9 what is x
    13·2 answers
  • -12x4m8n 6x5m-10n-6​
    15·2 answers
  • The mathematical model C = 800x + 100,000 represents the cost in dollars a company has in manufacturing x items during a month.
    13·1 answer
  • Double t, add v to the result, then multiply u<br><br>translate the phrase please!!
    6·1 answer
  • For the following exercises, evaluate the function at the indicated values:
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!