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soldier1979
3 months ago
11

give two examples that show how using parentheses can change the order in which operations are performed in an expression?

Mathematics
1 answer:
lawyer [12.5K]3 months ago
6 0
<span><span>Example<span>Simplify 3 + 5 </span>•<span> 2.</span>  </span><span> <span>3 + <span>5 </span></span>•<span> 2</span>  <span>According to order of operations, multiplication should occur before addition.</span> </span><span> 3 + 10 Next, perform the addition.</span><span>Result     </span><span>3 + 5 </span>•<span> 2 = 13</span></span>

 

 

 

<span>Example<span>ProblemSimplify 20 – 16 ÷ 4.  </span><span> <span>20 – 16 ÷ 4  </span><span>Order of operations indicates division should be completed prior to subtraction.</span> </span><span> <span>20 – 416</span>Then execute the subtraction.</span><span>Final result     </span>20 – 16 ÷ 4 =<span> 16</span></span>
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If m&lt;DBC=(12x-3)°, m&lt;DBE=(5x+12)°, and m&lt;EBC=(3x+13)°, find m&lt;EBC.
Leona [12618]

Answer:

m∠EBC=34°

Step-by-step explanation:

We establish that

m∠DBC=m∠DBE+m∠EBC

Refer to the accompanying diagram for clarity on the issue

Replace the known values in the equation and determine x

(12x-3)\°=(5x+12)\°+(3x+13)\°\\12x-3=8x+25\\12x-8x=25+3\\4x=28\\x=7

Calculate the size of angle EBC

m∠EBC=(3x+13)°

Insert the value for x

m∠EBC=(3(7)+13)°

m∠EBC=(21+13)°

m∠EBC=34°

8 0
3 months ago
PLEASE HELP A barrel in Jim's yard contains 60 gallons of water. Water leaks out of the barrel at a rate of 1 gallon every 10 mi
zzz [12365]
Let y represent the gallons of water left in the barrel, and let x represent the minutes that have passed. Water escapes the barrel at a rate of 1 gallon for every 10 minutes. Consequently, the appropriate linear equation for this scenario is shown in the attached graph.
3 0
2 months ago
Select all decimals that are equivalent to ( 9 × 100 ) + ( 2 × 10 ) + ( 3 × 1 10 ) + ( 5 × 1 100 ) . A. 92.35 B. 920.350 C. 902.
AnnZ [12381]

The question is not properly framed

Complete Question

Identify all decimals equivalent to ( 9 × 100 ) + ( 2 × 10 ) + ( 3 × 1/10 ) + ( 5 × 1/100 ). A. 92.35 B. 920.350 C. 902.35 D. 92.350 E. 920.35 F. 920.035

Response:

E. 920.35

Explanation:

( 9 × 100 ) + ( 2 × 10 ) + ( 3 × 1/10 ) + ( 5 × 1/100)

Step 1

(900) + (20) + (3/10) + (5/100)

Step 2

900 + 20 + 0.3 + 0.05

Step 3

920.35

Thus, the result is 920.35

4 0
2 months ago
A=9y+3yx solve for y
Inessa [12570]
The solution for y is y = \frac{a}{3(3 + x)}
3 0
3 months ago
Read 2 more answers
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