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kogti [31]
2 years ago
7

What is the explicit rule for the arithmetic sequence shown in the graph?

Mathematics
1 answer:
Harman [31]2 years ago
3 0

Answer:

a(n) = 9.5 + 2(n - 1)

Step-by-step explanation:

Observe that each new term is obtained by adding 2 to the previous term.  Thus, the common difference is 2 and the first term is 9.5.

Then a(n) = 9.5 + 2(n - 1)

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Dora drove 80 km in 40 minutes then 120 km in 1 hour and then the final 200km took him 1 hour 20 minutes. what is his average sp
bonufazy [111]

9514 1404 393

Answer:

  133 1/3 km/hour

Step-by-step explanation:

Average speed is computed as ...

  average speed = (total distance)/(total time)

  = (80 km +120 km +200 km)/(2/3 + 1 + 1 1/3 hour) = 400 km/(3 hour)

  = 133 1/3 km/hour

8 0
2 years ago
28xw+7wy-4kx-ky<br><br> Factor the polynomial completely<br><br> Thank you!
Genrish500 [490]

Answer:

(7w - k)(4x + y)

Step-by-step explanation:

Factor by grouping is best for this expression. To factor by grouping, group pairs of terms with parenthesis. Then find the GCF in each pair. If the parenthesis match after, the factoring is complete.

28xw + 7wy - 4kx - ky

(28xw + 7wy) + (- 4kx - ky)

7w(4x + y) - k (4x + y)

The factors are (7w - k)(4x + y).

3 0
3 years ago
What is the number whose 4/5 is 144
Savatey [412]

We want 4/5 of a number to be 144. This means that

\dfrac{4}{5} \cdot x = 144

Multiplying both sides by 5/4, we have

x = \dfrac{144\cdot 5}{4} = 180

4 0
3 years ago
PLEASE HELP!!
MAVERICK [17]

Answer:

43°

Step-by-step explanation:

Calculating for the measure of angle C using

<h3>sine rule</h3>

\frac{sin18}{9}  =  \frac{sinc}{20} \\ sinc =  \frac{sin18 \times 20}{9}  \\ sinc = 0.6867 \\ c =   \csc(0.6867)   \\ c = 43.3869 \\ c = 43 \: degrees

6 0
2 years ago
What is 9-3y=x I don't know this one
torisob [31]
The answer is 
y= - x-9/3 I believe.
1- Subtract 9 from both sides.
-3y = x - 9
2- Divide both sides by -3
y = - x-9/3
4 0
3 years ago
Read 2 more answers
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