Answer:
-3(-3x + 4) = 9x - 12
Step-by-step explanation:
-3( Ax + 4) = 9x - 12
-3Ax -12 = 9x - 12
Equating coefficients of x terms on both sides :
-3A = 9
A = -3
Therefore, -3(-3x + 4) = 9x - 12
Answer:
1. 3/10, 0.30
2. 21/50, 0.42
3. 9/50, 0.18
4. 7/20, 0.35
5. 1/1, 1.00
6. 29/100, 0.29
7. 14/25, 0.56
8. 200/3, 6600.66
9. 1/4, 0.25
Step-by-step explanation:
<h3>
Answer:</h3>
16) w = 4/15
18) r -16 = 25; Ronald is 41.
<h3>
Step-by-step explanation:</h3>
16) Multiply by the reciprocal of the coefficient of w:
(1/3)·3w = (1/3)·(4/5)
w = 4/15
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18) Ronald's age is unknown and what we're asked to find. Let r represent Ronald's age in years. Then Wendy's age, being 16 years less than Ronald's, can be represented two ways:
Wendy's age: r-16 . . . . . . 16 years younger than Ronald
Wendy's age: 25 . . . . . . .given
We can equate these two versions of Wendy's age to have a subtraction equation to find Ronald's age:
r - 16 = 25 . . . . . . . the equation
r = 41 . . . . . . . . . . . the solution; found by adding 16 to both sides