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viva [34]
3 years ago
8

A lot is 21 ft by 30 ft. To support a fence, an architect wants an upright post at each corner and an upright post every 3 ft in

between. How many of these posts are needed?
Mathematics
1 answer:
Bogdan [553]3 years ago
6 0
What we know:
Lot= 21 x 30ft
Perimeter=2l+2w
Want to put 4 corner post and one post every 3 ft

What we need to find:
How many post we need.

Perimeter=2 (21)+2 (30)=42+60=102ft

102/3=34

34 posts are needed.
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tangare [24]
600 feet of tape because 4 +4 for two sides of the window is 8 and 3+ 3 is 6, 14 plus the foot of overlap is 15 x 40 is 600.
3 0
3 years ago
A farm had 480 acres more wheat than corn. After the farmers collected 80% of the wheat and 25% of the corn, the area of the whe
SVEN [57.7K]
A farm had 480 acres more wheat than corn. Let use "W" to represent the Wheat and let use "C" to represent the corn. Hence, we have below:
W=C+480

The farmers collected 80% of the wheat and 25% of the corn and the area of the wheat is 300 acres less than the area of the corn:
W-0.8W=C-0.25C+300
0.2W=0.75C+300
We have two equations, two unknowns:
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6 0
2 years ago
Read 2 more answers
A movie theater has a seating capacity of 333. The theater charges $5.00 for children, $7.00 for students,
pantera1 [17]

Answer:

182 children, 91 adults, 60 students

Step-by-step explanation:

The quantity of adults is x, then the quantity of children are 2x,  the quantity of students is 333-x-2x=333-3x. The charge from all adults is 12x, students gave 7*(333-3x), children gave 5*2x=10x, the sum of all money is 2422

12x+ 7(333-3x)+10x=2422

12x+2331-21x+10x=2422

2331+x=2422

x=91- the amount of adults

1) 91*2=182- the amount of children

333-91-182= 60- the amount of students

6 0
3 years ago
What is the fraction 28/60 expressed in lowest terms?
DanielleElmas [232]
7/15 is your answer I am so happy that I could help :)
7 0
3 years ago
Read 2 more answers
Can a linear equation and a linear inequality be solved in the same way
frez [133]
You can solve them in the same way. you can add any positive or negative number to both the sides of an inequality.Also you can multiply  or divide both sides of an inequality by any positive number hope this helps.   :)
8 0
3 years ago
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