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Mathematics

1 answer:

nalin [4]3 years ago

5 0

Answer:

38.14 but if rounded up it becomes 38.15

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Michelle has $1,393 in a savings account. The interest rate is 9%, compounded annually.

suter [353]

A = P (1 + r)^n where P = initial amount, r = interest rate , n = number of years and A = amount after n years.

So here we have A = 1393(1 + 0.09) ^ 2 ( 0.09 = 9%)

= $1655.02 (answer)

3 0

3 years ago

Consider the quadratic equation x3 = 48-5. How many solutions does the equation have?

Arturiano [62]

Answer:

you would have 84-.10 I think

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

there were 15 questions of which nicole answered 8 incorrectly at this rate how many should she expect to answer correctly if sh

Leokris [45]

Answer:

72 Wrong, so find how many are right with 135 total

Step-by-step explanation:

It's similar to saying if she answered half and this continued how many would she have answered after answering a bigger number, you would say half.

so she answered 8/15 incorrectly a a smaller number, so she will answer that ratio with a bigger number. If it helps 8/15 is about 53%. just like 1/2 is half. So to find half you would multiply something by 1/2 and int he same way you multiply something by 8/15 to get that proportion of it.

so 135, if you take this 53%, or simply multiply it by 8/15 you get your answer of 72. So 72 wrong so al others are right, which you get with 135-72 = 63.

You could also do 135*(1-8/15) = 135 * 7/15. if you ever want to find something NOT part of the proportion you do 1 - that proportion.

8 0

4 years ago

Which two values of x are roots

FrozenT [24]

The answer is C.

To solve these types of equations you first need to make sure that you equation is equal to 0. In this case all of the numbers are already on the same side so no work needs to be done there. Then we can get a, b and c values for the quadratic equation by looking at the coefficients.

a = 4 (number attached to x^2)
b = -6 (number attached to x)
c = 1 (number with no variable attached)

Now we can put this into the quadratic equation.

$\frac{-b +/- \sqrt{ b^{2} -4ac} }{2a}$

$\frac{6 +/- \sqrt{ -6^{2} -4(4)(1)} }{2(4)}$

$\frac{6 +/- \sqrt{20} }{8}$

6 0

4 years ago

What is equivalent to √1,620 / √180

masya89 [10]

Answer:

the answer is this! <em><u>understand</u></em>

5 0

3 years ago