Answer:
see explanation
Step-by-step explanation:
Given
9
- 225
← factor out 9 from each term
= 9( - 25 ) ← difference of squares
Difference of squares factors in general as
a² - b² = (a - b)(a + b)
= (x² )² ⇒ a = x²
25 = (5
)² ⇒ b = 5
Hence
- 25
= ( -5 )( + 5 )
Thus
9 - 225
= 9 ( - 5 )( + 5 )
The decimal form of this is .30
(-79.54) / (-9.7) = <span>8.2
Steps:
</span>
<span><span>Conversion: 79.54 = <span>7954/100</span> = <span>3977/50
</span></span><span>Unary minus: -79.54 = -<span>3977/50</span></span><span>
Conversion: 9.7 = <span>97/10</span></span><span>
Unary minus: -9.7 = -<span>97/10
</span></span><span>Divide: -<span>3977/50</span> / (-<span>9710</span>) = <span>-397750</span> · <span>10-97</span> = <span>-3977 · (-10)50 · 97</span> = <span>397704850</span> = <span>415
</span>To divide one fraction by another, invert (turn upside-down) the second fraction, then multiply.
</span></span>
Answer
72% students likes to read .
Step-by-step explanation:
Let us assume that the percent of student likes to read be x.
As given
A survey reveals 252 out of 350 students in 7th grade like to read.
As Percent is always from 100 percent .
Thus
x is from 100 in case of proportions.
252 students are from 350 students .
Therefore the proportion equations becomes
x : 100 :: 252 : 350
Simplify the above
x = 72%
Therefore 72% students likes to read .
Answer:
x = 13
Step-by-step explanation:
Since the two given angles are vertical angles, we know (5x) = 65.
Divide both sides by 5 : <u>5x = 65</u> and we get x = 13
5
