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vfiekz [6]
3 years ago
10

(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
Sunny_sXe [5.5K]

Answer:12%

Step-by-step explanation:

(333000-293040)×100/333000

7 0
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.
Licemer1 [7]

Answer:

19338 kWh

Step-by-step explanation:

In Arizona, electricity cost eleven cents per kilowatt-hour.

The average home uses 66 million BTU per year i.e. 66000000 BTU per year.

Now, it is given in the question that 1 BTU is equivalent to 0.000293 kWh.

So, the average home uses (66000000 × 0.000293) = 19338 kWh per year.

Therefore, the number of kilowatt-hours used per year will be 19338. (Answer)

6 0
3 years ago
Jessica has 86 fake tattoos she kept 23 for herself and then shared the rest with 7 of her friends how many tattoos did each fri
Mama L [17]

86-23=63

63/7=9

you're welcome!

. . . . . . . .

6 0
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]

Since 1 pound is $3.09, 4.5 pounds will be:

4.5*3.09=13.905

It says to round to nearest hundredth, so your answer is $13.91.

5 0
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

5 0
3 years ago
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