Respuesta :
Answer:
B, C, D
Step-by-step explanation:
I understand that you question is:
Which expressions are equivalent to 4(4a+5)?
Choose 3 answers:
A 16a + 5
B 16a+20
C 12a+20+4a
D 2(8a+10)
E 16a+5+4
Then:
B, because:
4(4a+5) = 4•4a + 4•5 = 16a + 20
{distributive law}
C, because:
4(4a+5) = 16a + 20 = 12a + 4a + 20 = 12a + 20 + 4a
{distributive and associative laws}
D, because:
4(4a+5) = 2•2(4a+5) = 2[2(4a+5)] = 2(2•4a + 2•5) = 2(8a + 10)
{associative and distributive laws}
The required equivalent expressions for the expression 4(4a+5) are;
- 16a+20
- 2(8a+10)
- 12a + 20 + 4a
Correct question
Which expressions are equivalent to 4(4a+5)?
Choose 3 answers:
A 16a + 5
B 16a+20
C 12a+20+4a
D 2(8a+10)
E 16a+5+4
Given the expression 4(4a+5)
Given the values A, B, and C, according to the distributive law:
A(B+C) = AB + AC
Applying this to the given expression
4(4a+5)
= 4(4a) + 4(5)
= 16a + 20 (First expression)
Factoring out 2 from the result
16a + 20
= 2(8a) + 2(10)
= 2(8a + 10) (Second expression)
Rewriting equation 1
From 1; 16a + 20
16a + 20
= (12a+4a) + 20
= 12a + 20 + 4a (Third expression)
Hence the required equivalent expressions for the expression 4(4a+5) are;
- 16a+20
- 2(8a+10)
- 12a + 20 + 4a
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