For two ratios to form a proportion they have to be equal.
To see if two ratios are equal we express them in their simplest form.
In this case we notice that in the first ratio both numbers are multiples of five, then:
In the second case we notice that both numbers are multiples of 2, then:
Since both ratios can be simplified to the same final ratio, they form a proportion.
Answer:
The lemonade costs 1.4.
Step-by-step explanation:
This question is solved using a system of equations.
I am going to say that:
x is the cost of a cookie.
y is the cost of a lemonade.
Total cost for cookie and lemonade is 1.80.
This means that .
As we want y, we have that
Lemonade costs 1.00 more than the cookie?
This means that:
So
The lemonade costs 1.4.
Answer:
<u>Question 3</u>
Given expression:
Both parentheses share a common term.
To factor out a common term: ab + ac = a(b + c)
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<u>Question 4</u>
To calculate the amount of money Rajni had to begin with, sum the three amounts she spent:
As , then:
Collect and sum the whole numbers:
As , then