Discover the answers you need at Westonci.ca, a dynamic Q&A platform where knowledge is shared freely by a community of experts. Get immediate and reliable solutions to your questions from a community of experienced experts on our Q&A platform. Experience the ease of finding precise answers to your questions from a knowledgeable community of experts.
Sagot :
To find the value of the expression [tex]\( 21 - 2a \)[/tex] when [tex]\( a = 3 \)[/tex], follow these steps:
1. Substitute the given value of [tex]\( a \)[/tex] into the expression:
[tex]\[ 21 - 2a \][/tex]
When [tex]\( a = 3 \)[/tex], the expression becomes:
[tex]\[ 21 - 2 \times 3 \][/tex]
2. Perform the multiplication first, according to the order of operations (PEMDAS/BODMAS):
[tex]\[ 2 \times 3 = 6 \][/tex]
3. Substitute the result of the multiplication back into the expression:
[tex]\[ 21 - 6 \][/tex]
4. Perform the subtraction:
[tex]\[ 21 - 6 = 15 \][/tex]
Thus, the value of the expression [tex]\( 21 - 2a \)[/tex] when [tex]\( a = 3 \)[/tex] is [tex]\( 15 \)[/tex].
Therefore, the correct answer is:
D) 15
1. Substitute the given value of [tex]\( a \)[/tex] into the expression:
[tex]\[ 21 - 2a \][/tex]
When [tex]\( a = 3 \)[/tex], the expression becomes:
[tex]\[ 21 - 2 \times 3 \][/tex]
2. Perform the multiplication first, according to the order of operations (PEMDAS/BODMAS):
[tex]\[ 2 \times 3 = 6 \][/tex]
3. Substitute the result of the multiplication back into the expression:
[tex]\[ 21 - 6 \][/tex]
4. Perform the subtraction:
[tex]\[ 21 - 6 = 15 \][/tex]
Thus, the value of the expression [tex]\( 21 - 2a \)[/tex] when [tex]\( a = 3 \)[/tex] is [tex]\( 15 \)[/tex].
Therefore, the correct answer is:
D) 15
Answer:
D) 15
Step-by-step explanation:
21-2a
Let a =3
21 - 2(3)
Multiply the 2 and 3.
21 -6
Subtract.
15
We appreciate your visit. Our platform is always here to offer accurate and reliable answers. Return anytime. We hope you found what you were looking for. Feel free to revisit us for more answers and updated information. Westonci.ca is committed to providing accurate answers. Come back soon for more trustworthy information.