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Lubov Fominskaja [6]

3 years ago

14

Last week a certain brand of hand lotion cost $3.00 for a 16-ounce bottle. this week the hand lotion is on sale for $2.40 for a

16-ounce bottle. which is the percent decrease in the price of the hand lotion?
A:16%
B:13%
C:20%
D:25%

please show work thank you.

1 answer:

Yanka [14]3 years ago

6 0

$3.00-$2.40 = $0.60
$0.60/$3.00 = $0.2
$0.2x100 = 20% decrease

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2. Find the common difference and the recursive formula. a. 22, 19, 16, 13, …

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Answer:

The common difference d is d = -3

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Step-by-step explanation:

We need to find the common difference and the recursive formula.

a. 22, 19, 16, 13, …

First we will find common difference

The formula of arithmetic sequence is: $a_n=a_1+(n-1)d$

where a_n is nth term, a_1 is 1st term and d is the difference

Looking at the sequence we get: a_1=22, a_2=19

Using these values we can find d, the common difference

$a_n=a_1+(n-1)d\\put\:n=2, a_2=19, a_1=22\\19=22+(2-1)d\\19=22+d\\d=19-22\\d=-3$

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Now, we will find the recursive formula:

The recursive formula is of type: $a_n=a_{n-1}+d$

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3 years ago

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Answer:

21. ΔUYZ <u>Obtuse</u>

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26. ΔUXY <u>Equiangular and acute</u>

Step-by-step explanation:

We need to classify each triangle by its angles.

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Obtuse: The inner angle A is obtuse (more than 90 degrees). The other 2 angles are acute.

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3 years ago

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