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Tasya [4]
3 years ago
8

Using the given information, find the sum of each arithmetic series. 12. a, = 6 d = 7 n = = 12 S 12​

Mathematics
1 answer:
Naya [18.7K]3 years ago
3 0

Answer:

Step-by-step explanation

We need to have more infomation to finish this problem completely

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-2/3*3/5+5/2-3/5*1/6​
Kipish [7]

Answer:

2and19/90

Step-by-step explanation:

-2/3*3/5= _2/5

-2/5+5/2-(2/3×1/6)

-2/5+5/2-1/9

21/10-1/9

=199/90

=2/19/90

3 0
3 years ago
A car braked with a constant deceleration of 64 ft/s2, producing skid marks measuring 50 ft before coming to a stop. How fast wa
vitfil [10]

Answer:

The initial speed of the car was 80 ft/s.

Step-by-step explanation:

The deceleration is the rate at which the car speed decreases. In this case the speed of the car goes all the way down to 0 ft/s and in order to do that it travelled 50 ft.  So we will call the initial speed at which the car started to brake "v_0" and use Torricelli's equation to find it. The equation is given by:

v^2 = (v_0)^2 + 2*a*S

Where v is the final speed, v_0 is the initial speed, a is the rate of acceleration and S is the space travelled. Using the values that the problem gave to us we have:

0^2 = (v_0)^2 - 2*64*50

0 = (v_0)^2 - 6400

(v_0)^2 = 6400

v_0 = sqrt(6400) = 80 ft/s

Notice that in this case "a" was negative, since the car was decelerating instead of accelerating.

The initial speed of the car was 80 ft/s.

4 0
3 years ago
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I need help on this math because I don't understand
AlladinOne [14]
What do you need help with
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the retail price of the latest video game is $89.00. If the shipping charges are 7%, how much will the video game cost? Select o
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Your total will be B. $95.23.
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Is this answer correct?
katrin [286]

Answer:

yes

Step-by-step explanation:

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