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VikaD [51]
3 years ago
11

Evaluate (18)^2-(15)^2 Please show working.

Mathematics
2 answers:
dexar [7]3 years ago
8 0

Answer:

99

Step-by-step explanation:

You can solve it by Squaring/multiply 18 by itself and 15 by itself then subtract them both:

(18 × 18) - (15 × 15)

324 - 225

99

You could also do difference of two squares:

(x² - y²)

= (x + y) (x - y)

= (18 + 15) (18 - 15)

= (33) (3)

= 99

deff fn [24]3 years ago
6 0

Answer:

<h2>99</h2><h2 />

Step-by-step explanation:

Evaluate

= (18)^2-(15)^2

= 324 - 225

= 99

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Answer:

$172.27

Step-by-step explanation:

Original: x

New: 205

Percent Increase : 19%

205 = 119% of x

205/119 * 100 = 20500/119 = 172.26890... ≈ 172.27

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Step-by-step explanation:

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Solve the equation:<br><br> 1. |x-7|=8<br> 2. |x-9|=-14
Alecsey [184]
1. x=-1 or x=15
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A park ranger observed the number and ages of children who visited the park on a Friday morning. The results of his observations
aleksandr82 [10.1K]
ANSWER

The number of children between the ages of 9 and 15 who visited the park is
20


EXPLANATION


The number of children between the ages of 9 and 15 who visited the park are those within the age group 9 to 12 and 12 to 15.


We can from the graph that, the height of the bar that corresponds to the age group 9 to 12

= 14
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8 0
3 years ago
If 5 years ago Nina was twice as old as Sam, how soon from now will she be 1.5 times as old as Sam? If x is Sam's age 5 years ag
gavmur [86]

Answer:

In x - 5 years.

Step-by-step explanation:

5 years ago:

Sam's age: x

Nina's age: 2x

Now:

Sam's age: x + 5

Nina's age: 2x + 5

Let t be the number of years from now that Nina will be 1.5 times Sam's age.

In t years:

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Nina's age: 2x + t + 5

Nina will be 1.5 times Sam's age:

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x - 5 = t

t = x - 5

3 0
3 years ago
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