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GalinKa [24]
3 years ago
7

Mary Seitz invested a certain amount of money in a savings account paying 2% simple interest per year. When she withdrew her mon

ey at the end of 3 years, she received $120in interest. How much money did Mary place in the savings account?
Mathematics
1 answer:
My name is Ann [436]3 years ago
6 0

Answer:

زززز

Step-by-step explanation:

لبيسش

You might be interested in
Do you agree with the statement that " cubic functions must have at least 1 x-intercept but not more than 3, whereas quadratic f
vladimir2022 [97]

Answer:

Yes, I agree

Step-by-step explanation:

For the cubic function

A cubic function is represented as:

f(x)=ax^3+bx^2+cx+d

A cubic function may have 1, 2 or 3 x intercepts. This is shown below

For 3 x intercepts

y = x^3 - x

Equate y to 0

x^3 - x = 0

Expand

x(x^2 - 1) = 0

Express x^2 - 1 as difference of two squares

x(x - 1)(x +1 ) = 0

<em>x = 0 or 1 or -1</em>

For 2 x intercepts

y = x^3 - x

y  =(x-5)^2)(x+7)

Equate y to 0

(x-5)^2(x+7) = 0

Expand

(x-5)(x-5)(x+7) = 0

<em>x= 5 or x = -7</em>

For 1 x intercept

y = x^3

Equate y to 0

x^3 = 0

Take cube roots of both sides

x = 0

It has been shown above that a cubic function may have 1, 2 or 3.

So, I agree to the statement

For the quadratic function

A quadratic function will not have any x intercept when the function can not be factorized;

E.g.

y = x^2 + x + 17

<em>The above function has no x intercept.</em>

A quadratic function will have at least 1 x intercept when the function can be factorized;

E.g.

y = x^2- 6x + 9

Equate y to 0

x^2- 6x + 9 = 0

Expand

x^2 - 3x - 3x + 9 = 0

(x - 3)(x-3) = 0

x = 3

We've shown that a quadratic may have no x intercept, and it may also have x intercept(s)

Hence, I agree to both statement

3 0
2 years ago
I would appreciate if you answered!
anyanavicka [17]

Answer:

None of those options

Step-by-step explanation:

I just did the work myself and even ran it through a calculator but the correct answer isn't one of those options.  Here's my work:

-\frac{5}{6} =z+\frac{1}{8}\\-\frac{5}{8}-\frac{1}{8}=z\\-\frac{40}{48}-\frac{6}{48}=z\\-\frac{46}{48}=z\\-\frac{23}{24}

I'd contact you teacher about that...it might be an error in their system (it's happened to me a few times before where the correct answer is marked as incorrect or isn't even an option)

8 0
2 years ago
Anyone ??? I need help
Elina [12.6K]

Answer:

None of the above

Step-by-step explanation:

-9 tells the distance between her hand and the keys

4 0
3 years ago
Please help on this, this is on delta math btw but pleaseeee help
blagie [28]

Answer:

c = 2

Step-by-step explanation:

 6 = 6c-6

+6       +6

12 = 6c

12 / 6 = 2

3 0
2 years ago
1. Four boys decide to equally share some money they found on the ground. If each boys gets $5, how much money did the boys find
Ivan
So if 4 boys each got $5 then the equation would be 
4 x 5 
They found 20 dollars.
5 0
3 years ago
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