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3 years ago

Hi guys, I need help on this practice anyone willing to help; list of things to do

Mathematics

1 answer:

andreyandreev [35.5K]3 years ago

5 0

Answer:

B. y = x - 2

Step-by-step explanation:

The sale price (y) is $2 less than the original price (x - 2).

To test this out, if a book's original price is $10..

x = 10

Using y = x - 2 and to test out if it works, we'll plug in x = 10 to discover y.

y = 10 - 2

y = 8

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What is the slope of the line which passes through (−2, 0) and (0, 4)?

riadik2000 [5.3K]

Slope is rise/run, or y/x. So y from zero to 4 is 4, and x from -2 to zero is 2. and 4/2=2, so the slope is 2

5 0

4 years ago

Read 2 more answers

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

3 years ago

Read 2 more answers

Which equation matches the graph A.y=2x+3 B.y=-2x+3 C.y=-4x+2 D.y=4x+2

Dmitrij [34]

The correct answer is A

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3 years ago

The Wagner school store is having a sale! At the sale this week, a life sized stuffed animal of Wagner’s mascot is being sold fo

mash [69]

Answer:

$330

Step-by-step explanation:

Please see the attached picture for the full solution.

☆ There is no need to round the answer off to the nearest cents as the answer is a whole number.

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3 years ago

Correct the following paragraph so that it uses the right words and includes appropriate apostrophes.

andreev551 [17]

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4 years ago