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3 years ago

11

After a 75% reduction, you purchase a new DVD player DVD player on sale for $ 180. What was the original price of the DVD play

er DVD player?

1 answer:

Mkey [24]3 years ago

8 0

$240

You can do this by taking the sale price and dividing by the percentage.

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In a sequence of ten terms, each term (starting with the third term) is equal to the sum of the two previous terms. The seventh

poizon [28]

Answer:

$\boxed{a_1+a_2+a_3+a_4+a_5+a_6+a_7+a_8+a_9+a_{10}=66}$

Step-by-step explanation:

We know that in a sequence of ten terms, each term (starting with the third term) is equal to the sum of the two previous terms. The seventh term is equal to 6. Therefore, we have

$a_1+a_2=x\\a_3=x\\a_4=2x\\a_5=3x\\a_6=5x\\a_7=8x\\$

We know that:

$a_7=6\\\implies 8x=6\\x=\frac{3}{4}$

We get:

$a_1+a_2=x=\frac{3}{4}\\\\a_3=x=\frac{3}{4}\\\\a_4=2x=\frac{3}{2}\\\\a_5=3x=\frac{9}{4}\\\\a_6=5x=\frac{15}{4}\\\\a_7=8x=6\\\\a_8=13x=\frac{39}{4}\\\\a_9=21x=\frac{63}{4}\\\\a_{10}=34x=\frac{102}{4}\\$

Therefore, we calculate

$\boxed{a_1+a_2+a_3+a_4+a_5+a_6+a_7+a_8+a_9+a_{10}=66}$

4 0

2 years ago

If a=2, b= -1, c= -3 and d= -2 find :<br> 1/2bc-6ac+2ab<br> 1/4(ac)² +1/6ac

Arisa [49]

Answer:

34

8

Step-by-step explanation:

<u>1/2bc - 6ac + 2ab</u>

(1/2)(-1)(-3) - (6)(2)(-3) + (2)(2)(-1)

(1/2)(4) - (-36) + (-4)

2 + 36 - 4

34

<u>1/4(ac)² + 1/6ac</u>

(1/4)[(2)(-3)]² + (1/6)(2)(-3)

(1/4)(-6)² + (1/6)(-6)

(1/4)(36) + (-1)

9 - 1

8

7 0

3 years ago

You go to the store and pick out 3 apples for $0.60 each, 2 bananas for $0.50 each, and 1 quart of yogurt for $4.50. At checkout

Arlecino [84]

Answer:

$5.44

Step-by-step explanation:

3 0

3 years ago

can somebody please help my friend, she has asked everyone she knows and nobody knows how to solve it. please help ty

Nady [450]

Answer:

42

Step-by-step explanation:

First I'm going to assume that C and A are perpendicular.

Because its perpendicular, this creates a 90 degree angle which can be used to create the following equation.

$90 = 6x - 6 + 5x + 8$

Reduce

11x = 88

x = 8

We then plug in 8 into the equation 6x - 6 in order to solve for that angle.

6(8) - 6

42

4 0

2 years ago

5x 4 1/2 Answer with a mixed number in simplest form.

nekit [7.7K]

Answer:

22 1/2

Step-by-step explanation:

$5x4\frac{1}{2} =\frac{9}{2} x\frac{5}{1} = \frac{45}{2} = 22\frac{1}{2}$

3 0

3 years ago