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polet [3.4K]
3 years ago
13

What is the answer?How do you solve this?

Mathematics
1 answer:
Alika [10]3 years ago
4 0

Answer:

you have to look at the chart and use the chart to answer the questions at the botttom

Step-by-step explanation:

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Find out how long it takes a ​$ investment to double if it is invested at compounded . Round to the nearest tenth of a year. Use
BabaBlast [244]

Answer:

(A) 8.8 years

Step-by-step explanation:

Given that the principal amount = $ 3100

Rate of compound interest = 8% compounded semiannually.

The given formula is

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

Where A is the final amount, P is the principal amount, r is the rate of compound interest, t is the time and n is the number of times per year the interest is compounded.

From the given condition,

P=$3100

r= 8%=0.08 compounded semiannually

n=2

A=2 x 3100=$ 6200.

Put all these in the given formula to get the required time, we have

6200=3100\left(1+\frac{0.08}{2}\right)^{2t}

\Rightarrow \left(1+0.04\right)^{2t}=6200/3100

\Rightarrow 1.04^{2t}=2\\\\\Rightarrow 2t\log_{10}(1.04)=\log_{10}(2)\\ \\\Rightarrow 2t =\frac{\log_{10}(2)}{\log_{10}(1.04)}\\\\\Rightarrow 2t =17.673\\\\\Rightarrow t = 17.673/2=8.8365\\

On rounding to the nearest tenth of a year, t=8.8 years.

So, the invested amount will be double in  8.8 years.

Hence, option (A) is correct.

7 0
3 years ago
Kamal solved an equation as shown below. 3(x-8)=x+2x+7 3x-24=3x+7 -24=7 What is the solution to Kamal’s equation?
dem82 [27]

Answer:

7 is correct

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
In which equation is x the independent variable?<br> A. x=7y<br> B. y=7x<br> C. y+7=x<br> D. y/7=x
Arturiano [62]

Answer:

B is the answer.

A) No because the value of x depends on what 7•y is

C) No because x depends on the value of y+7

D) No because the x depends on the value of y/7

In other words, on B, x doesn't depend on anything, your just given the value of it. Don't know how else to explain it, hope you get it.

7 0
3 years ago
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Determine if the lines are parallel, perpendicular, or neither.<br> y=-2x – 4<br> 2x + y = 5
Otrada [13]

Answer:

parallel I think

Step-by-step explanation:

move the x to the left and divide by y to simplify. the new equation for the bottom will be y=-2x+5. For it to be parallel they have to have the same slope

7 0
2 years ago
Solve this equation 5x+17= 42
sergey [27]

Answer:

x = 5

Step-by-step explanation:

5x + 17 = 42

5x = 25

x = 5

4 0
3 years ago
Read 2 more answers
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