Solve each system of equations by using substitution

2x+y=4

3x+2y=1

The price of an item yesterday was $105. Today, the price fell to $63. Find the percentage decrease.

Solve this problem y=.01 (x-50) 2 + 30

Emillo has 8,450 trees to plant in rows on his tree farm. He will plant 125 trees per row. How many full row of trees will he have? explain

What type of function does this situation describe? (linear / exponential / quadratic / none) WHY?

Find the value of x if (2/3) ^x (3/2) ^2x = 27/8

Verify the identity: sin 4x = 2 sin 2x cos 2x

Steven has a bag of 20 pieces of candy. Four are bubble gum, 4 are chocolates, 4 are fruit chews, and the rest are peppermints. If he randomly draws one piece of candy what is the probability that it will be chocolate? A. 0.1 B. 0.2 C. 0.25 D. 0.4

What is 3.75 dollars rounded to the nearest dollar

Erica had 6 coins in her coin collection. she goes to a coin show and buys some coins. how many dose she have now?

Raul has 4 identical baseballcards of his favorite player. According to his monthly price guide, the change in value of one of the cards from the previous month was - 0.12. What was the combined change in value of the 4 cards?