Gita puts tires on 21 bicycles and tricycles. She uses 53 tires in all. How many tricycles are there?

1 answer:

5 0

First you do 53+21 =74 and then you will subtract 21 bicycle and tricycles by 74 the total. You should get 53. That's how you check the answer it is 74.

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erica [24]

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3 years ago

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11. Maria's age is 3 years more than twice George's age. Which expression represents George's age in terms of Maria's?

leonid [27]

Answer:

Step-by-step explanation:

Okay, the catch of this question is that they do a very good job of explaining Maria's age in terms of George's age, but they leave George's age in terms of Maria's all up to you.

First start off by doing an expression of what they explicitly give you. Maria's age in terms of George's age.

Let's use variables g, representing George's age and m representing Maria's age

m = 2g + 3

Okay, this is all dandy and all, but they ask us for George's age in terms of Maria's, so we need to isolate for g.

subtract the 3 from both sides, like so:

m - 3 = 2g

then divide 2 from both sides: (remember we're dividing the whole thing)

(m-3)/2 = g

Now we have an expression for George's age in terms of Maria's.

g = (m-3)/2 or $g = \frac{m-3}{2}$