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mr. diaz classwork math concepts date answer all questions. show all work hw 37 1. find the solution of each equation. (1) $2 = x - 4$ (2) $2y = -10$ 2. use the distributive property and simplify each expression. a. $5(3y - 1)$ b. $2(x - 7) - 2(3 - 4x)$ 3. find each sum or difference. a. $(2a^2 - 4a - 1) - (a^2 - 7a - 4)$ b. $(2y^2 + 3y + 1) + (y^2 + 3y - 4)$
Question 1 (1) : \( 2 = x - 4 \)
Step 1: Isoler \( x \)
Pour isoler \( x \), on ajoute 4 aux deux côtés de l'équation :
\( 2 + 4 = x - 4 + 4 \)
Step 2: Calculer
Simplifier les deux côtés :
\( 6 = x \)
Question 1 (2) : \( 2y = -10 \)
Step 1: Isoler \( y \)
Diviser les deux côtés par 2 :
\( \frac{2y}{2} = \frac{-10}{2} \)
Step 2: Calculer
Simplifier :
\( y = -5 \)
Question 2 (a) : \( 5(3y - 1) \)
Step 1: Appliquer la propriété distributive
Multiplier 5 par chaque terme à l'intérieur des parenthèses :
\( 5 \times 3y - 5 \times 1 \)
Step 2: Calculer
Simplifier :
\( 15y - 5 \)
Question 2 (b) : \( 2(x - 7) - 2(3 - 4x) \)
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s:
- (1) \( \boldsymbol{x = 6} \)
(2) \( \boldsymbol{y = -5} \)
- (a) \( \boldsymbol{15y - 5} \)
(b) \( \boldsymbol{10x - 20} \)
- (a) \( \boldsymbol{a^2 + 3a + 3} \)
(b) \( \boldsymbol{3y^2 + 6y - 3} \)