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Drupady [299]
3 years ago
5

I need help with this please

Mathematics
1 answer:
ankoles [38]3 years ago
4 0
Multiply them by distribution:

-18x² + 6xy + 72xy - 24y²

Combine like terms:

-18x² + 78xy - 24y²

The first choice is correct.
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An object has a mass of 440 kg and a volume of 11 m3. <br> Find the density of the object in kg/m3.
FrozenT [24]

Answer:

40 kg/m³

Step-by-step explanation:

To find the density divide the mass by the volume

440kg / 11 m³ = 40 kg/m³

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A passbook saving account has a rate of 6%. find the effective annual yield, rounded to the nearest tenth of a percent, if the i
irinina [24]

Answer:

a,b,c,d,e,f) The effective annual yield is 1.1P-P = 0.1P = 10%P.

Step-by-step explanation:

This is a compound interest problem

Compound interest formula:

The compound interest formula is given by:

A = P(1 + \frac{r}{n})^{nt}

A: Amount of money(Balance)

P: Principal(Initial deposit)

r: interest rate(as a decimal value)

n: number of times that interest is compounded per unit t

t: time the money is invested or borrowed for.

a)

r = 0.06

n: 2(semianually means that the interest is compounded twice a year).

t = 1.

A = P(1 + \frac{0.06}{2})^{2*1}

A = 1.1P

The acount started the year with P, and it ended with 1.1P, so the effective annual yield is 1.1P-P = 0.1P = 10%P.

b)

Now we have n = 3, since if the interest is compounded quarterly, is is compounded three times a year(a year has 3 quarters). So:

A = P(1 + \frac{0.06}{3})^{3*1}

A = 1.1P

The effective annual yield is 1.1P-P = 0.1P = 10%P.

c) Now we have n = 12, since the interest is compounded monthly, and there are 12 months a year. So:

A = P(1 + \frac{0.06}{12})^{12*1}

A = 1.1P

The effective annual yield is 1.1P-P = 0.1P = 10%P.

d) Since the interest is compounded daily, and we assume 360 days in a year, n = 360. So:

A = P(1 + \frac{0.06}{360})^{360*1}

A = 1.1P

The effective annual yield is 1.1P-P = 0.1P = 10%P.

e) The interest is compounded 1000 times a year, so n = 1000

A = P(1 + \frac{0.06}{1000})^{1000*1}

A = 1.1P

The effective annual yield is 1.1P-P = 0.1P = 10%P.

f) The interest is compounded 100000 times a year, so n = 100000

A = P(1 + \frac{0.06}{100000})^{100000*1}

A = 1.1P

The effective annual yield is 1.1P-P = 0.1P = 10%P.

6 0
3 years ago
What is the area of a concrete floor that is 110 feet long and 65 feet wide? The floor area is square feet.​
luda_lava [24]

Answer:

7150 square feet

Step-by-step explanation:

The area of a rectangle is the length times the width.

110*65=7150

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3 years ago
Absolute value equations
Shtirlitz [24]

Answer:

I5I + I-8I = 13

I-7I x I3I = 21

Step-by-step explanation:

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