5 cookies is $15... First you have to find the unit rate by dividing 12 and 4 to get $3 per cookies, than you have to add $3 to $12 to get the price of 5 cookies.
2. Your number is a negative integer, so belongs to the sets ...
Natural numbers are positive integers, also called "counting numbers," 1, 2, 3, and so on. Whole numbers are the natural numbers and zero. Irrational numbers are numbers that cannot be expressed as the ratio of an integer to a positive or negative natural number. Written in decimal, irrational numbers have a non-repeating fractional part of infinite length.
3. The phrase "6 times the difference of b and p" can be written as
... B.) 6(b-p)
4. 5(14 -2)²/2
... = 5·12²/2
... = 5·144/2
... = 720/2
... = 360
The appropriate choice is ...
... D.) 360
5. Put the values where the variables are, then do the arithmetic.
... u +xy = 18 +10·8 = 18 +80 = 98
The appropriate choice is ...
... C.) 98
<u>Understanding:</u>
The sum of 3 times a number (i'll define it as x) and 4 means is between -8 and 10 which means the value of 3x+4 is less than 10 and greater than -8. With that said, the inequality for that problem would be .
<u>Solving the problem:</u>
Now we know that , you can solve the problem by <em>subtracting 4</em> from each side then<em> dividing by 3.</em>
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<u>Final Answer:</u>
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To solve this we can make it into an equation, which looks like this
y = 2x (for Rebecca)
y = x + 10 (for Alice)
The we subtract one equation from the other to solve
0 = x - 10
10 = x
x = 10
Now we replace x in whichever equation and we get 20
So, each girl will read 20 books for them to be at the same book.
I hope this helps.
YOU'RE WELCOME :D