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
hoa [83]
3 years ago
15

Help please

Mathematics
1 answer:
Y_Kistochka [10]3 years ago
7 0
The first term is a(1) = -3
The recursive step is a(n) = a(n-1)+7 meaning "add 7 to each previous term to get the next term". This points us to the common difference d being 7

a1 = -3 
d = 7

an = a1 + d(n-1)
an = -3 + 7(n-1)
an = -3+7n-7
an = 7n-10

Answer: a_{n} = 7n-10 (it says an = 7n-10 if the image doesn't show up)
Note: the n starts at n = 1
You might be interested in
In AJKL, JL is extended through point L to point M, m m
arlik [135]

Answer:

x = 15

Step-by-step explanation:

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

∠ KLM is an external angle of the triangle, thus

∠ KLM = ∠ JKL + ∠ KJL , substitute values

5x - 7 = x + 20 + 2x + 3

5x - 7 = 3x + 23 ( subtract 3x from both sides )

2x - 7 = 23 ( add 7 to both sides )

2x = 30 ( divide both sides by 2 )

x = 15

4 0
3 years ago
MARIA WALKED 4.035 KILOMETERES. WHAT IS 4.035 WRITTEN IN AS EXPANDED FORM ?
notka56 [123]
Here's my interpretation:  4 whole km, plus zero tenths of a km, plus 3 hundredths of a km, plus 5 thousandths of a km.
4 0
3 years ago
Read 2 more answers
Debit cards and credit cards look the same. However, they work very differently. Which statement is true about debit cards? A) e
Ostrovityanka [42]
D sorry if not right
3 0
2 years ago
Slove 6/p = 36/54? <br> A. 12<br> B.9 <br> C. 4 <br> D. 8
timurjin [86]
Cross-multiplication:
36p = 54(6)
36p = 324
p = 9
The answer is B.
5 0
3 years ago
An article describes an experiment to determine the effectiveness of mushroom compost in removing petroleum contaminants from so
alexgriva [62]

Solution :

Let p_1 and p_2  represents the proportions of the seeds which germinate among the seeds planted in the soil containing 3\% and 5\% mushroom compost by weight respectively.

To test the null hypothesis H_0: p_1=p_2 against the alternate hypothesis  H_1:p_1 \neq p_2 .

Let \hat p_1, \hat p_2 denotes the respective sample proportions and the n_1, n_2 represents the sample size respectively.

$\hat p_1 = \frac{74}{155} = 0.477419

n_1=155

$p_2=\frac{86}{155}=0.554839

n_2=155

The test statistic can be written as :

$z=\frac{(\hat p_1 - \hat p_2)}{\sqrt{\frac{\hat p_1 \times (1-\hat p_1)}{n_1}} + \frac{\hat p_2 \times (1-\hat p_2)}{n_2}}}

which under H_0  follows the standard normal distribution.

We reject H_0 at 0.05 level of significance, if the P-value or if |z_{obs}|>Z_{0.025}

Now, the value of the test statistics = -1.368928

The critical value = \pm 1.959964

P-value = $P(|z|> z_{obs})= 2 \times P(z< -1.367928)$

                                     $=2 \times 0.085667$

                                     = 0.171335

Since the p-value > 0.05 and $|z_{obs}| \ngtr z_{critical} = 1.959964$, so we fail to reject H_0 at 0.05 level of significance.

Hence we conclude that the two population proportion are not significantly different.

Conclusion :

There is not sufficient evidence to conclude that the \text{proportion} of the seeds that \text{germinate differs} with the percent of the \text{mushroom compost} in the soil.

8 0
3 years ago
Other questions:
  • Rectangle GHIJ is dilated to be a smaller shape. What is the name of the image after the dilation?
    10·2 answers
  • leasing a car for a five-year period usually costs about the same as a five-year loan because __________. a. five-year leases ar
    12·1 answer
  • Please HELP. <br> 11x-2x+15=8+7+9x
    8·1 answer
  • -4.3 g equals 25.8 solve for G
    11·1 answer
  • Write a prime factorization of each of the numbers below
    8·1 answer
  • What is 6x +7=8x -15 solved.
    9·2 answers
  • What is 20/3 equal to?
    14·1 answer
  • Find the measure of angle x in the figure below: (1 point) Two triangles are shown such that one triangle is inverted and share
    7·1 answer
  • What is the slope in y = 6 + 2/3x
    9·2 answers
  • Write an equation of the line passing through the point A(8, 2) that is perpendicular to the line y = 4x−7.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!