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2 years ago

15

Celeste wants to have her hair cut and permed and also go to lunch. She knows she will need $68. The perm cost twice as much as

her haircuts and she's $5 for lunch. How much does the perm cost?

1 answer:

lutik1710 [3]2 years ago

4 0

I'm pretty sure it's $42

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Simplify (3 + 2i)(7 − 5i).

erma4kov [3.2K]

Rule needed: i^2 = -1
Standard form a + bi

(3 + 2i)(7 - 5i) FOIL
3 * 7 = 21
3 * - 5i = - 15i
2i * 7 = 14i
2i * -5i = - 10i^2 = - 10 * -1 = 10
Putting it all back together.
31 - i

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2 years ago

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stiv31 [10]

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mars1129 [50]

Answer:

The building is 187.5 feet tall.

Step-by-step explanation:

A nearby person is 6 feet tall, and casts a shadow that is 8 feet long.

This means that the relation between the real height and the shadow is given by:

$\frac{6}{8} = \frac{3}{4}$

A tall building casts a shadow that is 250 feet long. How tall is the building?*

The real height is three fourths of the shadow. So

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The building is 187.5 feet tall.

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2 years ago

Reduce the ratio to its lowest form. 72:8

dmitriy555 [2]

Answer:

9:1

Step-by-step explanation:

Try to reduce the ratio further with the greatest common factor (GCF).

The GCF of 72 and 8 is 8

Divide both terms by the GCF, 8:

72 ÷ 8 = 9

8 ÷ 8 = 1

The ratio 72 : 8 can be reduced to lowest terms by dividing both terms by the GCF = 8 :

72 : 8 = 9 : 1

Therefore:

72 : 8 = 9 : 1

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2 years ago