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Lena [83]
3 years ago
11

HELP PLEASE WILL MARK BRAINLIEST!!

Mathematics
1 answer:
loris [4]3 years ago
7 0

I WISH I COULD HELP BUT I HAVE NO IDEA.... IF I FIGURE IT OUT I WILL LET YOU KNOW

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Solve the system of equations by using a matrix. <br><br><br> x - 5y = -5<br><br> -4x - 2y = 20
Pepsi [2]

Answer:

1. x = -5 + 5y

2. x = -5 - y/2

Step-by-step explanation:

4 0
3 years ago
Given the function () = $
elena-s [515]

The inverse of the function f(x) = 1/3x^2 - 3x + 5 is  f-1(x) = 9/2 + √[3(x + 7/4)], the sum of the arithmetic series is 1078 and the common ratio of the sequence is 2

<h3>The inverse of the function?</h3>

The function is given as:

f(x) = 1/3x^2 - 3x + 5

Next, we rewrite the function as in vertex form

Using a graphing calculator, the vertex form of the function f(x) = 1/3x^2 - 3x + 5 is

f(x) = 1/3(x - 9/2)^2 - 7/4

Express f(x) as y

y = 1/3(x - 9/2)^2 - 7/4


Swap x and y

x = 1/3(y - 9/2)^2 - 7/4

Add 7/4 to both sides

1/3(y - 9/2)^2 = x + 7/4

Multiply through  by 3

(y - 9/2)^2 = 3(x + 7/4)

Take the square root of both sides

y - 9/2 = √[3(x + 7/4)]

Add 9/2 to both sides

y = 9/2 + √[3(x + 7/4)]

Rewrite as an inverse function

f-1(x) = 9/2 + √[3(x + 7/4)]

<h3>Sum of arithmetic series</h3>

Here, we have:

5 + 18 + 31 + 44 + ... 161

Calculate the number of terms using:

L = a + (n -1)d

So, we have:

161 = 5 + (n - 1) * 13

This gives

(n - 1) * 13 = 156

Divide by 13

n - 1 = 12

Add 1

n = 13

The sum is then calculated as:

Sn = n/2 * [a + L]

This gives

Sn =13/2 * (5 + 161)

Evaluate

Sn = 1078

Hence, the sum of the arithmetic series is 1078

<h3>The common ratio of the sequence</h3>

Here, we have:

T11  = 32 * T6

The nth term of a geometric sequence is

Tn = ar^(n-1)

This gives

ar^10 = 32 * ar^5

Divide by ar^5

r^5 = 32

Take the fifth root

r = 2

Hence, the common ratio of the sequence is 2


Read more about sequence at:

brainly.com/question/7882626

#SPJ1

6 0
1 year ago
Find the value of 8*10^0
WARRIOR [948]

8*10^0

<em><u>ANYTHING to the power of 0 is ALWAYS 1. </u></em>

8*1

8 is the correct answer.

7 0
2 years ago
Read 2 more answers
WILL MAKE BRAINLIEST!!!!!!! 19 pts
Ahat [919]

the answer should be A because the sea level has rised

5 0
3 years ago
What is 1+1 . i apparently have to write 20 characters so here they are
Liula [17]

Answer:

2

Step-by-step explanation:

8 0
3 years ago
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