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
xeze [42]
3 years ago
11

Anyone know this ? step-by-step please

Mathematics
1 answer:
Helga [31]3 years ago
3 0

Answer:

9.3

Step-by-step explanation:

substitute the given values for c and d into the expression

(0.9 × 15 ) - (2.1 × 2 )

= 13.5 - 4.2 = 9.3


You might be interested in
A + 2b = 1<br>2a + b = 8​
xxMikexx [17]

Answer:

............................

4 0
3 years ago
When plotting points on the coordinate plane below, which point would lie on the y-axis?
raketka [301]
1, 0 , 8, and 2 would all lie on the y-axis
5 0
3 years ago
Someone help please
Alla [95]

Answer:  Choice A

\tan(\alpha)*\cot^2(\alpha)\\\\

============================================================

Explanation:

Recall that \tan(x) = \frac{\sin(x)}{\cos(x)} and \cot(x) = \frac{\cos(x)}{\sin(x)}. The connection between tangent and cotangent is simply involving the reciprocal

From this, we can say,

\tan(\alpha)*\cot^2(\alpha)\\\\\\\frac{\sin(\alpha)}{\cos(\alpha)}*\left(\frac{\cos(\alpha)}{\sin(\alpha)}\right)^2\\\\\\\frac{\sin(\alpha)}{\cos(\alpha)}*\frac{\cos^2(\alpha)}{\sin^2(\alpha)}\\\\\\\frac{\sin(\alpha)*\cos^2(\alpha)}{\cos(\alpha)*\sin^2(\alpha)}\\\\\\\frac{\cos^2(\alpha)}{\cos(\alpha)*\sin(\alpha)}\\\\\\\frac{\cos(\alpha)}{\sin(\alpha)}\\\\

In the second to last step, a pair of sine terms cancel. In the last step, a pair of cosine terms cancel.

All of this shows why \tan(\alpha)*\cot^2(\alpha)\\\\ is identical to \frac{\cos(\alpha)}{\sin(\alpha)}\\\\

Therefore, \tan(\alpha)*\cot^2(\alpha)=\frac{\cos(\alpha)}{\sin(\alpha)}\\\\ is an identity. In mathematics, an identity is when both sides are the same thing for any allowed input in the domain.

You can visually confirm that \tan(\alpha)*\cot^2(\alpha)\\\\ is the same as \frac{\cos(\alpha)}{\sin(\alpha)}\\\\ by graphing each function (use x instead of alpha). You should note that both curves use the exact same set of points to form them. In other words, one curve is perfectly on top of the other. I recommend making the curves different colors so you can distinguish them a bit better.

6 0
2 years ago
One number is equal to the square of another. find the numbers if both are positive and their sum is 930.
Varvara68 [4.7K]
One number is equal to the square of another. find the numbers if both are positive and their sum is 930.

7 0
3 years ago
360 kilometers is 24% of how many kilometers.
Katena32 [7]
Do 360 <span>÷ 24/100. Flip the fraction so that it is now 360 x 100/24. Make that   360 x 100/24. That is then 36000/24. Do the division and then you get 1500.
</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • Find the value of x .. assume that segments that appear to be tangent are tangent .
    5·1 answer
  • Amy drove 2,789 miles on her cross country trip.she rounded that number to 2,800 miles when she spoke of the trip. To which plac
    8·1 answer
  • Place value of 12354897
    7·1 answer
  • Twenty percent of 150 is
    7·1 answer
  • An orange juice producer buys oranges from a large orange grove that has one variety of orange. The amount of juice squeezed fro
    13·1 answer
  • ................................
    5·2 answers
  • Given the trigonometric function value of theata Find the exact value of all remaining trigonometric function csc(theata)= 7
    12·1 answer
  • Alyssa attends football games at her school. At each football game, she buys a bottle of water for $0.75 and a candy bar for $0.
    14·1 answer
  • Please answer this question correctly please
    15·1 answer
  • Can someone please tell me the area of the square
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!