-16t^2+400=0
16t^2=400
take square root on both sides.
4t=20
t=20/4
t=5
Answer:
x = 4
Step-by-step explanation:
Step 1: Write out equation
3x + 6 = 18
Step 2: Subtract 6 on both sides
3x = 12
Step 3: Divide both sides by 3
x = 4
Answer:
D( the last) : The proportion of students who got their grandparents wired is about 0.52
Answer:
1227 feet
Step-by-step explanation:
Let x is the the length of the base along Michigan
Given:
- The highest of the building is 28 feet less than 7 times the length of the base along Michigan
<=> The highest of the building = 7x -28
- The length of the roof is 65 feet shorter than the length of the base below it.
<=> The length of the roof = x - 65
- The area of one particular side is 149,327.5 square feet
<=> *(7x -28 ) = 149327.5
<=> (2x -65) (7x -28) = 298655
<=> - 511x = 296835
<=> x = 165.
So the building's height is: 7(165) -28 = 1227 feet