The number 72 should replace the question mark.
Step-by-step explanation:
Step 1:
First, we need to determine how the values inside the triangles were attained in terms of the outer values.
We get that summing the bottom values on the triangle and multiplying it with the value on top equals the value in the triangle.
For triangle 1, 
For triangle 2, 
For triangle 3, 
Step 2:
By using the same method for the fourth triangle we have;
For triangle 4: 
So the question mark equals 72.
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Answer:
Step-by-step explanation:
The inequality Equation =
42 + 5x < 60
To stay within her budget of less than $60 she must use less than 3.6 Gigabytes
Step-by-step explanation:
Under her cell phone plan, Brooklyn pays a flat cost of $42 per month and $5 per gigabyte. She wants to keep her bill under $60 per month.
Let the number of gigabytes = x
Under $60 means less than $60
The inequality =
$42 + $5×x < $60
42 + 5x < 60
Solving for x
42 + 5x < 60
5x < 60 - 42
5x < 18
x < 18/5
x < 3.6 Giga bytes
Hence, to stay within her budget of less than $60 she must use less than 3.6 Gigabytes
Answer:
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Step-by-step explanation:
