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3 years ago

6

On a spelling quiz, Lily got 16 out of 20 questions correct. Select all the expressions that show the ratio of Lily’s correct an

swers to incorrect answers.
A. 45

B. 164

C. 4:1

D. 5:4

E. 16:20

1 answer:

levacccp [35]3 years ago

8 0

Answer:

E.

Step-by-step explanation: Unless you accidentally swapped the 5 and 4 around for D, then the answer is just E.

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Some one must have beaten me here Devora thinks

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3 years ago

What is the slope of a line that passes through the points (-2,3) and (4,-12)

posledela

Answer:

m = -5/2

Step-by-step explanation:

Solve for slope with the following equation:

<em>m </em>(slope) = (y₂ - y₁)/(x₂ - x₁)

Let:

(4 , -12) = (x₁ , y₁)

(-2 , 3) = (x₂ , y₂)

Plug in the corresponding numbers to the corresponding variables:

<em>m </em>= (3 - (-12))/(-2 - 4)

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4 years ago

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3 years ago

Find 10th term of a geometric sequence whose first two terms are 2 and -8. Please answer!!

Shalnov [3]

Answer:

The 10th term is -524,288

Step-by-step explanation:

The general format of a geometric sequence is:

$a_{n} = r*a_{n-1}$

In which r is the common ratio and $a_{n+1}$ is the previous term.

We can also use the following equation:

$a_{n} = a_{1}*r^{n-1}$

In which $a_{1}$ is the first term.

The common ratio of a geometric sequence is the division of the term $a_{n+1}$ by the term $a_{n}$

In this question:

$a_{1} = 2, a_{2} = -8, r = \frac{-8}{2} = -4$

10th term:

$a_{10} = 2*(-4)^{10-1} = -524288$

The 10th term is -524,288

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3 years ago