All categories

3 years ago

25 Points!! The graph represents the first three terms in an arithmetic sequence.

Mathematics

2 answers:

atroni [7]3 years ago

7 0

Answer:

I solved the sum and added it in the attachment!

Drupady [299]3 years ago

4 0

Answer:

Step-by-step explanation:

$y-1=\frac{4-1}{2-1}(x-1)\\y-1=3(x-1)\\y=3x-3+1\\y=3x-2$

an=an-1+3

when x=15

y=3×15-2=45-2=43

a15=43

You might be interested in

Students get two grades for a test in an introductory psychology course: a letter grade, and a numerical equivalent (weighted va

jolli1 [7]

11+18+52+13+6=100 100/5=20 average is 20 points

6 0

3 years ago

Read 2 more answers

Help me ill give u a thanks!

stiv31 [10]

Answer:

11. 68.6 mph

12. 5/6 page (0.83)

Step-by-step explanation:

You simply divide them (remember the word "per" means divide).

$\dfrac{120}{1 \frac34} \approx 68.6$

$\dfrac{8 \frac13}{10} = \frac56$

5 0

3 years ago

Which statement completes step 4 of the proof?

natulia [17]

Need more information

8 0

3 years ago

Read 2 more answers

Help me plzzzzzzzzzz

marin [14]

Answer:

what is it?

Step-by-step explanation:

simply,subtract,find the domain,factor,

or write it in standard form.

3 0

4 years ago

Read 2 more answers

Consider the quadratic function f(x)=−x^2+x+30

yaroslaw [1]

Answer:

The smallest xx-intercept is $x = -5$

The largest xx-intercept is $x = 6$

The yy-intercept is $y = 30$ .

Step-by-step explanation:

Given a quadratic function in the following format:

$f(x) = ax^{2} + bx + c = 0, a \neq 0$

The x-values of the x-intercepts are $x_{1}, x_{2}$ , given by the following formulas.

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

We have that:

$f(x) = -x^{2} + x + 30$

This is not in the format above. I will multiply by (-1), so we have:

$f(x) = x^{2} - x - 30$

So, $a = 1, b = -1, c = -30$

$\bigtriangleup = b^{2} - 4ac = (-1)^{2} - 4*(1)*(-30) = 1 + 120 = 121$

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a} = \frac{-(-1) + \sqrt{121}}{2(1)} = \frac{12}{2} = 6$

$x_{2} = \frac{-b + \sqrt{\bigtriangleup}}{2*a} = \frac{-(-1) - \sqrt{121}}{2(1)} = \frac{-10}{2} = -5$

This means that

The smallest xx-intercept is $x = -5$

The largest xx-intercept is $x = 6$

The y-intercept is the value of f(x) when x = 0. So

$f(x)=−x^{2}+x+30$

$f(0) = 30$

The yy-intercept is $y = 30$ .

5 0

3 years ago