3 years ago

X intercept for 2x +5y = -6

Mathematics

2 answers:

Vlad1618 [11]3 years ago

8 0

2x + 5y = -6
-5y -5y
___________
2x = -11y
__ ___
2 2
x = 5.5

Anettt [7]3 years ago

5 0

Answer:

(-3, 0)

Step-by-step explanation:

The x-intercept is the value of x when y = 0.

2x + 5y = -6

Set y = 0 2x + 5(0) = -6

2x = -6

Divide each side by 2 x = -3

The x-intercept is at (-3, 0).

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Given the sequence in the table below, determine the sigma notation of the sum for term 4 through term 15

goblinko [34]

$a_n=5 \ for \ n=1 \\
a_n=-10 \ for \ n=2 \\
a_n=20 \ for \ n=3$

You can see it's a geometric sequence because the ratio is constant ( $\frac{a_3}{a_2}=\frac{a_2}{a_1}$ ).
The nth term of a geometric sequence:
$a_n=a_1 \times r^{n-1}$

$a_1=5 \\
r=\frac{a_2}{a_1}=\frac{-10}{5}=-2 \\ \\
a_n=5(-2)^{n-1}$

It has to be the sum for term 4 through term 15, so n=4 and the number above the sigma is 15.

Your answer:
$\sum^{15}_{n=4} 5(-2)^{n-1}$

3 0

2 years ago

Read 2 more answers

What’s is the answer

77julia77 [94]

C and E, I believe since the other theorems don’t exist and AAS does not apply

5 0

2 years ago

Need help! Do anyone know?

Katyanochek1 [597]

Could you please show the question so I can try to answer it

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