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
dem82 [27]
3 years ago
14

What is (4,-7) reflected on the x-axis

Mathematics
1 answer:
Furkat [3]3 years ago
8 0

Answer:

( 4, 7)

Step-by-step explanation:

You might be interested in
If S_1=1,S_2=8 and S_n=S_n-1+2S_n-2 whenever n≥2. Show that S_n=3⋅2n−1+2(−1)n for all n≥1.
Snezhnost [94]

You can try to show this by induction:

• According to the given closed form, we have S_1=3\times2^{1-1}+2(-1)^1=3-2=1, which agrees with the initial value <em>S</em>₁ = 1.

• Assume the closed form is correct for all <em>n</em> up to <em>n</em> = <em>k</em>. In particular, we assume

S_{k-1}=3\times2^{(k-1)-1}+2(-1)^{k-1}=3\times2^{k-2}+2(-1)^{k-1}

and

S_k=3\times2^{k-1}+2(-1)^k

We want to then use this assumption to show the closed form is correct for <em>n</em> = <em>k</em> + 1, or

S_{k+1}=3\times2^{(k+1)-1}+2(-1)^{k+1}=3\times2^k+2(-1)^{k+1}

From the given recurrence, we know

S_{k+1}=S_k+2S_{k-1}

so that

S_{k+1}=3\times2^{k-1}+2(-1)^k + 2\left(3\times2^{k-2}+2(-1)^{k-1}\right)

S_{k+1}=3\times2^{k-1}+2(-1)^k + 3\times2^{k-1}+4(-1)^{k-1}

S_{k+1}=2\times3\times2^{k-1}+(-1)^k\left(2+4(-1)^{-1}\right)

S_{k+1}=3\times2^k-2(-1)^k

S_{k+1}=3\times2^k+2(-1)(-1)^k

\boxed{S_{k+1}=3\times2^k+2(-1)^{k+1}}

which is what we needed. QED

6 0
2 years ago
A square plastic tarp has a perimeter of 68 meters. How long is each side of the tarp?
alina1380 [7]

Answer:

17 meters

Step-by-step explanation:

The perimeter is the addition of all sides. Since the perimeter is 68 meters and a square has 4 sides, we can divide 68 by 4 and we get 17.

7 0
2 years ago
Read 2 more answers
Function 1: y = 4x + 5 Function 2: The line passing through the points (1, 6) and (3, 10). Which of these functions has the grea
Gwar [14]

Answer:

Step-by-step explanation:

function 1 : y = 4x + 5

In y = mx + b form, which is what ur equation is in, the slope can be found in the m position. So the slope of this function is 4.

function 2 : (1,6),(3,10)

slope = (y2 - y1) / (x2 - x1)

(1,6)...x1 = 1 and y1 = 6

(3,10)...x2 = 3 and y2 = 10

now we sub

slope = (10 - 6) / (3 - 1) = 4/2 = 2

B. Function 1, because the slope is 4 and the slope of function 2 is 2. <==

8 0
2 years ago
Read 2 more answers
2 6/8 in simplest form
Vesna [10]

Answer:

2 3/4

Step-by-step explanation:

8 0
3 years ago
James correctly answered 85% of the 60 problems on his math test. How many questions did James answer correctly❄️
harina [27]

Answer:

James answered 51 questions correctly.

Step-by-step explanation:

1) Slide the decimal 2 places to the left in the percentage (85% = .85)

2) Multiply total by new decimal (60 x .85)

3) All done! (51)

Keep in mind that 100% is just 1 whole. Therefor 85% of one whole is .85. In this problem, 60 represents our whole.

3 0
2 years ago
Other questions:
  • What would the proportion be for #20 and #21<br><br> Thx :)
    8·1 answer
  • What is the means-to-MAD ratio of the two data sets, expressed as a decimal?
    8·1 answer
  • 3 hundreds + 4 tens + 6 ones
    11·1 answer
  • Find the missing exponent
    7·2 answers
  • Has 3/4 hour to play video games take some 1/12 hour to set up the system each round of his favorite game takes 1/6 hours how ma
    7·1 answer
  • Please someone help me I just have 20 minutes left
    11·1 answer
  • You spin the spinner twice. Find the probability of spinning a three and then a 4.
    10·1 answer
  • Find the slope (0,2) and (3,-3)
    8·1 answer
  • HELP ASAP 20 BRAINLY POINT PLUS USER HELPPP ​
    12·2 answers
  • Which represents the inverse of the function f(x) = 4x?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!