OK I need help the answer is c but I didn't understand the teacher explanation pls help me

Answers

Answer 1

Answer: 9 - 6 + 4 - 8/3 ..,
geometric series a(n) = a1r^(n-1)

r = a(n+1)/a(n)
-6/9 = -2/3
4/-6 = -2/3
-8/3/4 = -2/3
so r = -2/3 and a1 = 9

Sn = a1(1-r^n)/(1-r) = 9(1-(-2/3)^n)/(1-(-2/3))
n is infinite Sn = 9/(5/3) = 27/5

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How many solutions does the nonlinear system of equations graphed belowhave?A. TwoB OneO C. ZeroO D. Four

Answers

solutions are intersection points, basically they are the values that satisfy both equations which happen to be the points in common or interseciton points

we see that the line intersects the circle in 2 places
2 solutions

A

Which radical expression is equivalent to 3^3/4

Answers

The numerator of the fraction is the power of the number and the denominator is the root of the number. This is expressed as follows:

⁴√(3)³

Answer:27

Step-by-step explanation:

Find the highest common factor (HCF) of 30 and 45

Answers

Answer:

The highest common factor of 30 and 45 is 15.

Step-by-step explanation:

factors of 30 = 1, 2, 3, 4, 5, 6, 10, 15, 30 ; factors of 45 are = 1, 3, 5, 9, 15, 45)

Greatest common factor is 15

Answer:

15.

Step-by-step explanation:

HCF is also called GCD. So, you divide both numbers with a common number that can divide both numbers at the same time without a remainder.

3 30 45

5 10 15

2 3

3 × 5 = 15

What do you add to 3 7/8 to make 7

Answers

If you would like to know how much do you have to add to 3 7/8 to get 7, you can calculate this using the following steps:

3 7/8 = 31/8

7 - 3 7/8 = 7 - 31/8 = 56/8 - 31/8 = 25/8 = 3 1/8

The correct result is 3 1/8 or 25/8.

To make it to 7 you have to convert mixed fraction to improper fraction and then to decimal..

3 7/8 = 45 / 8 = 5.625
after this you can subtract 7 from 5.625
i.e. 7 - 5.625 = 1.375

So if you add 1.375 with 5.625 you will get 7
i.e. 1.375 + 5.625 = 7

If a new jacket sells for $30, find the total cost if you were charged 5% sales tax. Round your answer to the nearest cent.

Answers

We would multiply $30 by 5% to first find 5%
5% = 0.05
$30 x 0.05 = $1.50
Now we add that to 30
$30 + $1.50 = $31.50

Your answer is $31.50

Josiah went to the barber to get his haircut.It cost $18 for the haircut.Josiah tipped the barber 15%.What was the total cost of the haircut including the tip?

Answers

Answer:

Tip -$2.70

Total -$20.70

Step-by-step explanation:

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