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Andrew [12]
3 years ago
14

The number of people that enter a contest the 1st day is 27. The 2nd day 31 people enter and 35 enter on the 3rd day. This patte

rn continues and the contest lasts 14 days.
What is the total number of people that enter the contest? Write the arithmetic series formula you used to determine the total number of people and show all the steps to find the solution
Mathematics
2 answers:
sammy [17]3 years ago
6 0

Answer:

742

Step-by-step explanation:

27 + 31 + 35 + ...

a = 27

d = 31 - 27 = 4

S14 = (14/2)[2(27) + (14-1)(4)]

= 7(54 + 52)

= 7(106)

= 742

melamori03 [73]3 years ago
5 0

The answer to this question is 742

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Please help... need help ASAP due today... which ones are the answers?
andrey2020 [161]

Answer:

Choices 1 and 4 are correct.

Step-by-step explanation:

We first need to find what the slope of the line is. That way, we can find out which possible answers are perpendicular to it:

\frac{4-(-2)}{3-1}=\frac{6}{2}=3

Since we now have the slope, we need the negative reciprocal of it. Remember: if x is the slope, it's negative reciprocal will be -\frac{1}{x}. Therefore, if the line's slope is 3, then we need to find answers with a slope of-\frac{1}{3}.

The first answer is correct, as you have marked. The second answer, while written a little weirdly, does show the slope as 3, which we know as wrong. The third choice is not correct, however. This equation is written in point-slope form, wherey-y_{1}=m(x-x_{1}). The only variable we have to worry about is m, which, in the third choice, is 3. The fourth answer is correct, which sounds weird at first. Let's put that equation into slope-intercept form:

x+3y=9\\3y=9-x\\y=3-\frac{1}{3}x\\y=-\frac{1}{3}x+3

Equations like these can be real sneaky, so it's important not to jump to conclusions with them.

6 0
3 years ago
The assembly of a machine takes 3/4 hour there are 12 steps in the assembly process what is the average time for each step
S_A_V [24]
We can solve this two different ways. I'll do both, and you choose which one makes the most sense:
We can divide the fraction 3/4 by 12. remember, when we divide fractions, we flip the second fraction and change the sign to multiplication:
3/4 ÷12     [starting equation]
3/4 x 1/12  [flip and change sign]
3/48    [now reduce]
1/16 Each step takes 1/16 of an hour. 
1/16 x 60 = 3 3/4, or 3.75 minutes

Second way:
3/4 of an hour is 3/4 of 60...45 minutes.
Still, we divide out:
45 ÷ 12   [starting equation]
3 9/12    [divide with remainder]
3 3/4 minutes...3.75 minutes

5 0
3 years ago
Part 2 of my first question.
azamat

Answer:

Step-by-step explanation:

integer=8

negative fraction=1/2

positive fraction=1/9

negative decimal=0.4

positive decimal=0.8

5 0
3 years ago
5.8 = x/2.2<br><br> A: 127.6<br> B: 0.37<br> C: 3.7<br> D: 12.76
Nataly [62]
Hi there! To solve this, all we have to do is multiply each side by 2.2 to cancel out the variable and to find the value for it. 5.8 * 2.2 is 12.76. 12.76/2.2 is 5.8. x = 12.76. The answer is D.
3 0
3 years ago
Read 2 more answers
F(x)=-x^2 -4x -2, for this equation find the solutions, the coordinates of the vertex, and the axis of the symmetry.
Zina [86]

Answer:

Step-by-step explanation:

hello :

  Completing The Square   x²-4x-2= (x²-4x+4)-4-2 = (x-2)²-6

the vertex is : (2 , -6)

now calculate the solutions : (x-2)²-6 =0

(x-2)²= 6   means :  x-2 =√6   or   x-2 = -√6

x = 2+√6   or x =  2-√6

4 0
2 years ago
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