34 + 0 + 18 + 26
= (34 + 26) + (0 + 18)
= 60 + 18
= 78
Used:
a + b = b + a - commutative property
0 + a = a - identity property
Answer:
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Step-by-step explanation:
Answer: Restaurant: $34.50; Toy Company: $4.50
Step-by-step explanation:
Let's represent the situation mathematically. I will use "r" for the restaurant stock price and "t" for the toy company stock price.
represents the value of their stock portfolio.
represents that the restaurant stock was worth $30 more than the toy company stock.
We need to multiply the second equation by 60 to balance the terms out. This gets us .
Now, you can combine the like terms in these equations to get , which can be simplified further to .
Now you need to divide both sides by 102 to remove the coefficient, getting you . This means that the price of the restaurant stock was $34.50.
To find the toy company stock price, subtract $30 from the restaurant stock price, because the restaurant stock is worth $30 more than the toy company stock. This gets you $4.50.
2 is to 4 because 64/8 is 8. 4/2 is 2. 2 x 2 is in proportion to 8 x 8