Answer:
Step-by-step explanation:
3x^2 + 5x + 25 when x = 3
= 3(3)^2 + 5(3) + 25
= 3(9) + 15 + 25
= 27 +15 + 25
= 67
Answer:
NOT
Step-by-step explanation:
27.36 - 23.78 = 3.58
It is 3.58 more than 23.78.
The two packages mailed together is cheaper.
If seperately:
3 pounds package= $(x+2y)
5 pounds package= $(x+4y)
If combined:
3+5=8 pounds
= $(x+7y)
amount of money saved=$[(x+2y)+(x+4y)]-$(x+7y)
Answer:
360 sq. units
Step-by-step explanation:
area of DOIT = (20+20) × (3+6)
= 40×9 = 360 sq. units
Answer: The height of the building is 6.49 meters.
Step-by-step explanation:
This can be translated to:
"A building projects a 7.5 m shadow, while a tree with a height of 1.6 m projects a shadow of 1.85 m.
Which is the height of the building?"
We can conclude that the ratio between the projected shadow is and the actual height is constant for both objects, this means that if H is the height of the building, we need to have:
(height of the building)/(shadow of the building) = (height of the tree)/(shadow of the tree)
H/7.5m = 1.6m/1.85m
H = (1.6m/1.85m)*7.5m = 6.49m
The height of the building is 6.49 meters.