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ipn [44]
1 year ago
11

1. The 4th, 5th, and 6th terms of an arithmetic sequence are 19, 23, and 27 respectively. What is the first

Mathematics
1 answer:
babymother [125]1 year ago
8 0

Answer: 7

Step-by-step explanation: The only pattern in this sequence that I can see is addition by 4. Therefore, the 3rd term is 15, the 2nd is 11, the 1st is 7.

Please consider Brainliest.

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Please give an explanation on how you got this answerI'm not sure if it's too late or what, but I can't get it.
Alona [7]
Step 1: multiple the second equation by 2 so that you get -1/4 for the coefficient of y, the same as in equation 1
equation 2 multiply by 2: 1/4 x - 1/4 y=38  ..........name this equation 3
subtract equation 1 from equation 3: (1/4 x -1/2 x)=38-10
-1/4 x = 28
x=-112
plug in x=-112 in any of the equation, you will get y=-264
so the answer is A
8 0
3 years ago
What is x if 3x-2=x-3​
blsea [12.9K]

Answer:

x=-1/2

Step-by-step explanation:

add 2 to both sides

3x=x-1

subtract x from both sides

2x=-1

divide by 2

x=-1/2

7 0
3 years ago
Read 2 more answers
If 5x - 2y = 6 and 3x + 2y = 10, then find x​
Darina [25.2K]

Answer:

x=2

Step-by-step explanation:

After solving with substitution, you would know x = 2

5 0
3 years ago
Read 2 more answers
If f(×)=2×^2+3, then which of the following represent f(-1)?
eimsori [14]

To find the inverse of this function, we first need to replace f(x) with y.

y = 2x^2 + 3

Now, we swap x and y

x = 2y^2 + 3

Now, we solve for y.

-3

x - 3 = 2y^2

Sqrt both sides.

√(x - 3) = 2y

Divide by 2

√(x - 3)/2 = y

Replace y with f^-1(x)

√(x - 3)/2 = f^-1(x)


Just realized you were asking for f(-1), not f^-1(x)

Feels bad.

f(-1) = 2(-1^2 + 3)

f(-1) = 2(-1^5)

f(-1) = 2(-1)

<u>f(-1) = -2</u>

I'm leaving the original answer in case you also need the inverse function. :)

3 0
3 years ago
Graph (-6,32/3) on a number line
e-lub [12.9K]

Given the point (-6, 32/3)

x-coordinates = -6

y-coordinates = 32/3 = 10 2/3

The graph of the point will be as follows:

8 0
1 year ago
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