3 years ago

Find the 20th term of the arithmetic sequence 7, 3, -1, -5, …

1 answer:

7 0

7, 3,-1,-5
decreased by 4 each time
arthymetic
an=a1+d(n-1)
a1=first term
d=common diffrence
n=which term

first term is 7
common difference is -4
an=7-4(n-1)
for 20th term
a20=7-4(20-1)
a20=7-4(19)
a20=7-76
a20=-69

answer is B

You might be interested in

Explain how bacteria are both helpful and harmful to out bodies

Pavel [41]

Answer:

Step-by-step explanation:

Bacteria is helpful because it helps protect the cells in your intestines. Its, harmful because itI can cause a disease in your lungs.

Hope this helps!

8 0

3 years ago

BRAINLIEST!

kodGreya [7K]

<span>4y - 12x = 20
4y = 12x + 20
y = 3x + 5
parallel has same slope = 3

answer
</span><span>A. Y = 3x - 1 </span>

4 0

3 years ago

You buy some living room furniture: couch = $499.99, loveseat = $239.49, and rocker = $139.73. How much is your total purchase?

kondor19780726 [428]

$879.21
hope this helps :)

8 0

3 years ago

Read 2 more answers

Write this percent as a fraction. 56 1/4 % (56 whole number and 1/4)

3241004551 [841]

56 $\frac{1}{4}$ %

= $\frac{225/4}{100}$

= $\frac{225}{400}$

= $\frac{9}{16}$ (Answer)

3 0

3 years ago

Find the average value fave of the function f on the given interval. f(t) = e^sin(t) cos(t), [0, π/2]

RideAnS [48]

The question is related to integration and we have to used the following formula

$\frac{1}{b-a}\int\limits^a_b {f(x)} \, dx$

$\frac{1}{\pi /2 -0}\int\limits^0_{\pi/2} {e^{sin t}cos t } \, dt$

$= \frac{2}{\pi}(e^{sin t})_{0}^{ \pi /2}$

$=\frac{2}{\pi}(e^{sin(\pi/2)} -e^{sin0})$

$=\frac{2}{\pi}(e -1)$

6 0

3 years ago