Answer:
The ratio of red to green crayons is 18 to 24 which can be reduced to 3 to 4.
Step-by-step explanation:
Answer:
Lisa is 5 years old
Step-by-step explanation:
we can make an equation like
4x=15+x
X can represent Lisa’s current age
Now just solve for X
3x=15
x=5
And we can check
If Lisa is 5 years old now
In 15 years she would be 20
And 20 is 4 times as 5 which Is her current age
So Lisa is 5 years old now.
Answer:
Step-by-step explanation:
Say we are testing 100 people
we test 100 times
80 of the 100 tests result in 5 people having the disease.
so 5 people of 80 of 100 test have this disease
therefore, 5/80/100
.065
Answer:
The diameter of an atom is 25000 times the diameter of a pearl.
Step-by-step explanation:
Given that,
The diameter of a pearl is 
The diameter of an atom is 
Taking the ratio,
So, the diameter of an atom is 25000 times the diameter of a pearl.
Hey there! :)
The formula for (a + b)^2 is a^2 + 2ab + b^2. In this case, x is a, and so b would have to be 4. We would need to add 4^2 = 16 to both sides of the equation to complete the square.
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Hope this helps!
==jding713==
