3 years ago

Solve by factoring. 1.) 0=6x^2-13x-5 2.) 0=4x^2-7x+3

Mathematics

1 answer:

s2008m [1.1K]3 years ago

6 0

1. x= -1/3 or x= 5/2

2. x=3/4 or x=1

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Step-by-step explanation:

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Molodets [167]

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a person invest in 9000 in a bank. the bank pays 5% interest compounded semi annually. to the nearest tenth of a year, how long

QveST [7]

Answer:

10.1 years.

Step-by-step explanation:

It is given that,

Principal = 9000

Rate of interest = 5%

No. of times interest compounded = 2 times in an year

Amount after certain time = 14800

The formula for amount:

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

where, P is principal, r is rate of interest, n is no. of times interest compounded in an year and t is time in years.

Substitute the given values in the above formula.

$14800=9000(1+\frac{0.05}{2})^{2t}$

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$1.644=(1.025)^{2t}$

Taking log both sides.

$\log(1.644)=\log(1.025)^{2t}$

$\log(1.644)=2t\log(1.025)$ $[\because \log a^b=b\log a]$

$\frac{\log(1.644)}{2\log(1.025)}=t$

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Therefore, the required time is 10.1 years.

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Step-by-step explanation:

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