I bought 3 Books my total is 150$ 1 book is 50% more expensive than all of them how much is it

Mathematics

1 answer:

Olin [163]3 years ago

5 0

Answer:

The more expensive book cost $90, the other two combined cost $60.

Step-by-step explanation:

x = cost of more expensive book

y = subtotal cost of the other books

x = 50% more than y, so x = 1.50y = 1.5y

x + y = total cost = $150

1.5y + y = 150

y = 150/2.5 = 60

x = 1.5y = 1.5(60) = 90

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tester [92]

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3 years ago

Janice is 7 years older than Tam. Complete the table, and then graph this situation.

qwelly [4]

Answer:

The table in the exercise can be completed with the next results:

x y
2 9
4 11
6 13
8 15

Step-by-step explanation:

As in the exercise Janice is 7 years older than Tam, to obtain the result in the table, you must add 7 to each age in the column x, with this we can make the next formula:

y = x + 7

Remember that x is Tam's age, and y is Janice's age, so, you must replace the x variable in each case to obtain the result to y:

When x is 2:

y = 2 + 7
y = 9

When x is 4:

y = 4 + 7
y = 11

When x is 6:

y = 6 + 7
y = 13

When x is 8:

y = 8 + 7
y = 15

At last, to obtain the graph you can use the formula made: y = x + 7, and you'll obtain a graph like the attached picture, where each time x obtain a unit, the y variable obtain a unit too maintaining the diference of 7.