3 years ago

What is the value of 4^-2? Leave your answer in fraction form of necessary.

Mathematics

2 answers:

valkas [14]3 years ago

8 0

Answer:

1/16

Step-by-step explanation:

We know that a^ -b is equal to 1 / a^b

That means

4^-2 = 1/ 4^2 = 1/16

Liono4ka [1.6K]3 years ago

5 0

Answer:

$4^{-2} \\= \frac{1}{4^{2} } \\= \frac{1}{16} \\$

The property used here is $a^{-m} = \frac{1}{a^{m} }$

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A physical education class has three times as many girls as boys. During a class basketball game, the girls average 18 points ea

BigorU [14]

Let the number of girls be g and the number of boys be b.
b = 3g
Class average = class score/class size = 17
17 = (class score) / 3g + g
68g = class score
Class score = girls score + boys score
Girls average = girls score/g
girls score = 18g
68g = 18g + boys score
boys score = 50g
Boys average = 50g/3g
= 16.7

4 0

2 years ago

Jeffrey earned $65 doing yard work. He bought a pair of jeans for $31.25 and a sweatshirt for $16.50.He set aside the money left

koban [17]

Answer:

$17.25

Step-by-step explanation:

Jeffrey earned $65 doing yard work.

He bought a pair of jeans costs = $31.25

and a sweatshirt costs = $16.50

Total amount he spent = 31.25 + 16.50 = $47.75

Now he left with money from his shopping = $65.00 - $47.75