Answer:
C. 3(2x + 5y) is the algebraic expression equivalent to the expression
Step-by-step explanation:
From the question, the given expression is 6x + 15y.
Factorizing this expression gives 3(2x + 5y). Hence, the algebraic expression equivalent to the expression 6x + 15y is 3(2x + 5y). (Option C).
Checking the remaining options
A. 3(2x - 5y)
Expanding this gives 6x - 15y. It is not equivalent to the given expression
B. 3(5x - 2y)
Expanding this gives 15x - 6y. It is not equivalent to the given expression
D. 3(5x + 2y)
Expanding this gives 15x + 3y. It is not equivalent to the given expression.
Hence, C. 3(2x + 5y) is the algebraic expression equivalent to the expression.
Answer:
-6,2
Step-by-step explanation:
Assuming missing symbol is +
3(x+2)=12
eiher distribute or
3(x+2)=3(4)
divide both sides by 3
x+2=4
minus 2 from both sides
x=2
The correct answer to this question is A. 9.4 x , 9.25 x , 2.5 x , 7 x
Explanation:
These numbers are written in scientific notation. In this system, the exponent shows the number of spaces the period has been moved to make the number shorter. Additionally, a positive exponent shows the number has a certain number of digits to the right, while a negative exponent shows the number has digits to the left. In this way, the numbers presented can be converted as:
9.4 x = 0.000000094 (Exponent indicates eight spaces to the left)
9.25 x = 0.00000925 (Exponent indicates six spaces to the left)
2.5 x = 2500 (Exponent indicates three spaces to the right)
7 x = 7000 (Exponent indicates three spaces to the right)
Put the first equation into the second
4x -3x = 3
x = 3
plug in 3
-3(3) = -9
y = -9