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4 years ago

Write the explicit formula that represents the geometric sequence -2, 8, -32, 128

1 answer:

5 0

An = a1 * r^(n - 1)....where a1 is the first term and r is the common ratio

to find the common ratio, take ur 2nd term and divide it by ur first term
so ur common ratio is : 8 / -2 = -4....this is basically saying that to find ur next term, u multiply by -4.

so ur rule is : an = -2 * -4^(n - 1) <==

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Solve for b.

storchak [24]

Answer:

1. b=(d-c)/a

Step-by-step explanation:

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8 0

2 years ago

How many terms are there in 2x+8-7y3

Evgen [1.6K]

There are 3 terms in this expression. You can determine this answer by knowing that terms are either a single number or variable or numbers and variables multiplied together. Here's a picture example below:
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4 0

3 years ago

Read 2 more answers

Four friends go out to eat and their meal costs $86.50. The sales tax is 6.75% and they tip the waiter 20%. How much should each

Stolb23 [73]

Answer:

$27.41

Step-by-step explanation:

Meal Cost = $86.50

Sales Tax= 6.75% of the Meal Cost

= 6.75% X 86.50

= 0.0675 X 86.50

=$5.84

They tipped the Waiter 20%

20% of 86.50

=0.2 X 86.50

=$17.30

Total Bill= Meal Cost + Sales Tax + Tip

= 86.50 +5.84 + 17.30

=$109.64

Since the friends are four, each one will be expected to pay:

$109.64/4

=$27.41

Each of the friends should pay $27.41 to the nearest cent.

5 0

3 years ago

c) The GCF and LCM of two numbers are 2 and 70 respectively. If one of the numbers is 10, find the other number? [3m] solution:

Mice21 [21]

Their LCM is

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8 0

3 years ago

What is the x-intercept of a line that passes through the point (3,4) and has a slope of 2?

Blababa [14]

Answer:

(1,0)

Step-by-step explanation:

Hi there!

We want to find the x intercept of the line that passes through the point (3,4) and has a slope of 2

First, let's find the line

We are given both a slope, and a point. We can write the equation of the line in point-slope form, which is $y-y_1=m(x-x_1)$ , where m is the slope and $(x_1, y_1)$ is a point

We do have everything needed to write the equation, let's just label everything to avoid confusion:

m=2

$x_1=3$

$y_1$ =4

Now substitute those values as the variables that they represent into the equation:

$y-y_1=m(x-x_1)$

y-4=2(x-3)

Now we have the equation in slope-point form

The x intercept of the line is the value in which the line passes through the x axis. The value of y at this point is 0

So we can substitute y as 0 in the equation to find out the value of x:

y-4=2(x-3)

0-4=2(x-3)

Multiply

0-4=2x-6

Add 6 to both sides

0+2=2x

Simplify the left

2=2x

Divide both sides by 2

1=x

So the value of the x intercept is 1, also written as the point (1,0)

Hope this helps!

6 0

3 years ago