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SSSSS [86.1K]
3 years ago
15

9. Write the equation in standard form: 25x2 –16y2 = 400

Mathematics
1 answer:
mafiozo [28]3 years ago
8 0

Answer:

25x^2 - 16y^2 - 400 = 0

Step-by-step explanation:

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One cubic meter of water weighs approximately 2200 pounds. There are 100 cm in one meter. If you have a box-shaped fish tank tha
Diano4ka-milaya [45]

Answer:

158.4 pounds

Step-by-step explanation:

first find the volume of the tank

V = 30 \times 30 \times 80

V = 72000 cm^3

to convert this to m^3 we know that 1m = 100cm

V = 72000 cm^3 \times \left(\dfrac{1\,\text{m}}{100\,\text{cm}}\right)^3

V = 72000 cm^3 \times \left(\dfrac{1\,\text{m}^3}{100^3\,\text{cm}^3}\right)

the cm^3 cancel out.

V = \dfrac{72000}{100^3} m^3

V = 0.072\,m^3

by simply converting the side-lengths to meters beforehand can give you this answer directly:

V = 0.3 \times 0.3 \times 0.8 = 0.072 m^3

it is given that 1 meter cube of water weighs about 2200 pounds.

1\,m^3 = 2200 \,\text{lb}

multiply both sides with 0.072 to find our answer:

1\,m^3 \times 0.072 = 2200 \times 0.072 \,\text{lb}

0.072\,m^3 = 158.4 \,\text{lb}

hence the weight of the water in the tank would be 158.4 pounds!

3 0
3 years ago
What is the position<br> number of the term<br> 125 in the sequence<br> f(n) = 2n+3?
spin [16.1K]

Answer:

61st term in the sequence

Step-by-step explanation:

125 = 2n + 3

122 = 2n

n = 61

8 0
2 years ago
Two fractions with different denominators that have the sum of 1/3
klemol [59]
1/4. and. 1/12. will do that.
3 0
3 years ago
Mai bought a television for $330. The tax rate is 8%. How much did Mai pay for the television?
Bezzdna [24]
Mai paid $412.50 for the T.V.
8 0
3 years ago
Read 2 more answers
How many defective telephones
zhenek [66]

Answer:

Option 3: 300 phones

Step-by-step explanation:

Given

Phone produces each day: 1000

Number of phones that were checked = 30

Defective phones = 9

So the probability of defective phones will be calculated by dividing the number of defective phones by total number of phones checked.

So, the probability of defective phones

= 9/30

= 0.3 or 30%

So, from 1000 phones the defective phones will be:

1000*0.3

= 300 Phones ..

5 0
3 years ago
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