The second of two numbers is 3 less than twice the first. Their sum is 42. Find the numbers
1 answer:
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Answer:
Step-by-step explanation:
Given
The surface area of a rectangular prism is
Width of prism
Length of prism
height of prism
Surface area is given by
Put values
Now, the volume of Prism is given by
Answer:
A. length = 23 cm; width = 5 cm
Step-by-step explanation:
So if 4 times the width would be and 3 more than would be
, the equation would be
. If the perimeter is 56, then the new equation,
can be formed. This simplifies to
, then to
, then to
, and finally,
. So the width is 5, and now plug it into the first equation.
, becomes
, becomes
.
So the dimensions are: length = 23 cm, width = 5 cm.
*And just to be sure, which is correct.