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3 years ago

Please help me !!

Mathematics

2 answers:

aleksley [76]3 years ago

6 0

$1)~3x-7-2x+5=6\iff (3x-2x)+(-7+5)=6\iff\\\\ x-2=6\iff x=6+2\iff\boxed{x=8}\\\\
2)~A(x)=\dfrac{f(2)-f(-5)}{(2)-(-5)}=\dfrac{(2^2+7\cdot2+10)-((-5)^2+7\cdot(-5)+10)}{7}\\\\=\dfrac{(4+14+10)-(25-35+10)}{7}=\dfrac{28-0}{7}=\dfrac{28}{7}=4\iff\boxed{A(x)=4}$

lilavasa [31]3 years ago

5 0

Number 1 is x=8!!

2 is pretty confusing so I hope someone else can answer two as I have answered 1!

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Part b

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Step-by-step explanation:

We can use the future vaue formula for compound interest given by:

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

Where P represent the present value, r=0.0675 , n is the number of times that the interest is compounded in a year and t the number of years.

Part a

For this case n = 4. If we use the future value formula we got:

$A= 2500 (1+ \frac{0.0675}{4})^{4*10}= 4882.506$

Part b

For this case n = 365. If we use the future value formula we got:

$A= 2500 (1+ \frac{0.0675}{365})^{365*10}= 4909.776$

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3 years ago