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3 years ago

(4x-1)(4x+1)-3=15x^2

Mathematics

1 answer:

algol133 years ago

8 0

(16x^2+4x-4x-1)-3=15x^2
16x^2-1-3=15x^2
16x^2-4=15x^2
X^2=4
X=+or-2

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One year, the population of a city was 333,000. Several years later it was

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Step-by-step explanation:

(333000-293040)×100/333000

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3 years ago

A 5 kW solor energy system can collect 9000 kWh of energy per year. In Arizona, electricity cost eleven cents per kilowatt hour.

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Answer:

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3 years ago

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you're welcome!

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3 years ago

One pound of ground beef is $3.09. How much is 4.5 pounds? Round to the nearest hundredth, if necessary.

olga55 [171]

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3 years ago

Read 2 more answers

What is the cost of constructing a fence 6 feet, 6 inches, high around a lot measuring 90 feet by 175 feet, if the cost of erect

boyakko [2]

Answer:

The total cost is $3,504.63

Step-by-step explanation:

Length of fence = 90 feet

Breadth of fence = 175 feet

Height of fence = 6 feet, 6 inches

1 inch = 0.0833333 feet

6 inches = 6*0.0833333 =0.4999998 feet

So, Height of fence = 6 feet + 0.49 feet =6.49 feet ≈ 6.5 feet

Perimeter = $2(Length \times breadth)=2(90 +175) = 530 feet$

Cost of erecting the fence is $1.25 per linear foot

So, Cost of erecting the fence in 530 feet = $530 \times 1.25 = 662.5$

Total surface area = $2(length +breadth) Height =530 \times 6.5=3445ft^2$

The cost of materials is $0.825 per square foot of fence

Cost of material for 3445 sq.feet = $3445 \times 0.825 =2837.7525$

So, total cost = 2842.125+662.5 = 3504.63

Hence The total cost is $3,504.63

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3 years ago