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strojnjashka [21]
3 years ago
6

What is the explicit formula for the arithmetic sequence –7.5, –9, –10.5, –12...

Mathematics
1 answer:
natita [175]3 years ago
3 0

Answer:

= - 1.5n - 6

Step-by-step explanation:

Given that the sequence is arithmetic with n th term ( explicit formula

= a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = - 7.5 and d = - 9 - (- 7.5) = - 9 + 7.5 = - 1.5

= - 7.5 - 1.5(n - 1) = - 7.5 - 1.5n + 1.5 = - 1.5n - 6

Step-by-step explanation:

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What is the value of 6n - 2 when n = 3?
Yuliya22 [10]

Answer:

16

Step-by-step explanation:

Substitute 3 for n,

6(3) - 2

then multiply

18 - 2

then subtract

16

8 0
3 years ago
Can someone please help me with this???
tino4ka555 [31]

Answer:

1 cm

Step-by-step explanation:

To solve this problem we can use the Pythagorean theorem. In fact the diagonal of a rectangle is an hypotenuse of a right triangle, while the length is a leg. The width is the other leg

width = √2^2 - (√3)^2 = √4 - 3 = √1 = 1 cm

8 0
2 years ago
What is the solution set of {x | x < -3} ∩ {x | x > 5}
lozanna [386]
Any x in this set will be real numbers that are both less than -3 and greater than 5. But that's not possible, so this set is empty.
7 0
3 years ago
What is the value of this expression? 7d squared+10 d=3
elixir [45]
The answer is 451
- hope this helped-
4 0
3 years ago
Read 2 more answers
The question is below:​
Sonja [21]

Answer:

x = 19.5, RQS=43

Step-by-step explanation:

It is important to note that RQS and TQS are supplementary, meaning their angles will add up to 180. Knowing this, we can create and solve the equation to find x..

(2x+4) + (6x+20) = 180

8x + 24 = 180

8x = 156

x = 19.5

Now that we know the value of x, we can substitute it into the equation for RQS, 2x+4.

2(19.5)+4

39+4

43

Hope this helped!

4 0
3 years ago
Read 2 more answers
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