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
wolverine [178]
3 years ago
13

3 7 11 15 19 Find the 9th term in the sequence.

Mathematics
1 answer:
Allushta [10]3 years ago
5 0
3
7
11
15
19
23
27
31
35
39
43
47
51
You might be interested in
NEED HELP ASAP PLEASE ON ALL OF THEM !!!!
ludmilkaskok [199]
SNKRS watch Poseidon last by laughably Lance
5 0
3 years ago
30 Points!!!!
natta225 [31]

Answer:

1st one is >

2nd one is <



8 0
3 years ago
Write the expression as a single logarithm<br> 2 ln 7 + ln(x+5) - ln(x-3)
yulyashka [42]

Answer:

ln ((49(x+5))/x-3)

7 0
3 years ago
Match the identities to their values taking these conditions into consideration sinx=sqrt2 /2 cosy=-1/2 angle x is in the first
BaLLatris [955]

Answer:

\cos(x+y) goes with -\frac{\sqrt{6}+\sqrt{2}}{4}

\sin(x+y) goes with \frac{\sqrt{6}-\sqrt{2}}{4}

\tan(x+y) goes with \sqrt{3}-2

Step-by-step explanation:

\cos(x+y)

\cos(x)\cos(y)-\sin(x)\sin(y) by the addition identity for cosine.

We are given:

\sin(x)=\frac{\sqrt{2}}{2} which if we look at the unit circle we should see

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

We are also given:

\cos(y)=\frac{-1}{2} which if we look the unit circle we should see

\sin(y)=\frac{\sqrt{3}}{2}.

Apply both of these given to:

\cos(x+y)

\cos(x)\cos(y)-\sin(x)\sin(y) by the addition identity for cosine.

\frac{\sqrt{2}}{2}\frac{-1}{2}-\frac{\sqrt{2}}{2}\frac{\sqrt{3}}{2}

\frac{-\sqrt{2}}{4}-\frac{\sqrt{6}}{4}

\frac{-\sqrt{2}-\sqrt{6}}{4}

-\frac{\sqrt{6}+\sqrt{2}}{4}

Apply both of the givens to:

\sin(x+y)

\sin(x)\cos(y)+\sin(y)\cos(x) by addition identity for sine.

\frac{\sqrt{2}}{2}\frac{-1}{2}+\frac{\sqrt{3}}{2}\frac{\sqrt{2}}{2}

\frac{-\sqrt{2}+\sqrt{6}}{4}

\frac{\sqrt{6}-\sqrt{2}}{4}

Now I'm going to apply what 2 things we got previously to:

\tan(x+y)

\frac{\sin(x+y)}{\cos(x+y)} by quotient identity for tangent

\frac{\sqrt{6}-\sqrt{2}}{-(\sqrt{6}+\sqrt{2})}

-\frac{\sqrt{6}-\sqrt{2}}{\sqrt{6}+\sqrt{2}}

Multiply top and bottom by bottom's conjugate.

When you multiply conjugates you just have to multiply first and last.

That is if you have something like (a-b)(a+b) then this is equal to a^2-b^2.

-\frac{\sqrt{6}-\sqrt{2}}{\sqrt{6}+\sqrt{2}} \cdot \frac{\sqrt{6}-\sqrt{2}}{\sqrt{6}-\sqrt{2}}

-\frac{6-\sqrt{2}\sqrt{6}-\sqrt{2}\sqrt{6}+2}{6-2}

-\frac{8-2\sqrt{12}}{4}

There is a perfect square in 12, 4.

-\frac{8-2\sqrt{4}\sqrt{3}}{4}

-\frac{8-2(2)\sqrt{3}}{4}

-\frac{8-4\sqrt{3}}{4}

Divide top and bottom by 4 to reduce fraction:

-\frac{2-\sqrt{3}}{1}

-(2-\sqrt{3})

Distribute:

\sqrt{3}-2

6 0
3 years ago
ANSWER FAST PLEASE!!!!<br> Which one is closer to 3?<br> 2.5 2 1/5
olasank [31]

Answer:

2.5 is closer

Step-by-step explanation:

Had this on a worksheet for math.

3 0
3 years ago
Other questions:
  • Stephanie built a box to hold sports equipment. The box is in the shape of a rectangular prism. The
    15·2 answers
  • Which one is right ?
    13·1 answer
  • HELP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 10PTS PLUS BRAINLEIST!!!!!!!!!!!!!! THIS!!!!! IS!!!!! URGENT!!!!!!
    11·1 answer
  • Solve for x 3x^2-21x+3=0
    11·1 answer
  • Create a quadratic trinomial with zeros equal to 4 and 5
    6·1 answer
  • Leo works at the Bagel Shop after school and on Saturdays. He is paid $4 per hour after school and $5 per hour on Saturday. Last
    9·1 answer
  • What is the root word for phobia
    6·2 answers
  • For the quadratic, y = -2(x - 1)(x + 4), the x-intercepts are
    12·1 answer
  • Does this graph represent a proportional relationship? How do you know?
    13·2 answers
  • If (k-6)(k+2)-(k²-20)=2k+6, whatis tge value of k?​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!