Answer:
a
Step-by-step explanation:
i did this in middle shoool
hehe
The most basic and common reason to use parentheses, brackets, and braces is to control the order of operations.
<h3>What are parentheses?</h3>
In mathematics, parenthesis is used to arrange numbers in the sequence of operations, clarify numbers, and denote multiplication.
Suppose you have an expression as:-
E = { ( 5-2 )8} 6
In this case, you would calculate 5 minus 2 first (parentheses), then multiply by 8 (brackets), then complete the part inside the curly braces, and finally multiply by 6.
Therefore the most basic and common reason to use parentheses, brackets, and braces is to control the order of operations.
To know more about parentheses follow
brainly.com/question/1778745
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Let x = first plane's speed.
We have the equation:
2 hours * x km/h + 1.5 hours * (x+60) km/h = 3135 km.
3.5 hours*x km/h + 90 km = 3135km
3.5hours*x km/h = 3045km
x = 870 km/h.
The first plane is traveling at 870 km/h, therefore since it is 60 km/h faster, the second plane is traveling at 930 km/h.
24: 10
12: 5 is equivalent to 24: 10
<h2>
Answer:</h2>
(a) 6
(b) 9
<h2>
Step-by-step explanation:</h2>
The units of a whole number is the rightmost digit in the number. For example, if the number is <em>15678</em>, the units is <em>8</em> since that is the rightmost digit. Another example is <em>25795</em>. The units is <em>5.</em>
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(a) To find the units of the square of -2346,
<em>i. First find the square of (-2346)</em>
(-2346)² = (-2346) x (-2346) = 5503716
<em>ii. Now find the rightmost digit.</em>
The rightmost digit of 5503716 is 6.
<em>Therefore, the units of the square of (-2346) is </em><em>6</em>
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(b) To find the units of the square of -5677,
<em>i. First find the square of (-5677)</em>
(-5677)² = (-5677) x (-5677) = 32228329
<em>ii. Now find the rightmost digit.</em>
The rightmost digit of 32228329 is 9.
<em>Therefore, the units of the square of (-5677) is </em><em>9</em>
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