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Zolol [24]
2 years ago
9

Howard earned $48 in interest after saving for 3 years at a simple annual interest rate of 2%. How much did Howard originally de

posit?
Mathematics
2 answers:
vitfil [10]2 years ago
6 0
P=i/rt
P=48÷(0.02×3)
P=800
vovikov84 [41]2 years ago
3 0

Answer:

Howard originally deposited $800.

Step-by-step explanation:

Interest = $48

t = 3 years

r = 2% or 0.02

p = ?

Simple interest formula is :

I=p\times r\times t

Substituting the values in formula, we get;

48=p\times0.02\times3

=> 48=0.06p

p = $800

Hence, Howard originally deposited $800.

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Which function in vertex form is equivalent to f(x) = x2 + x +1? f(x) = (x + one-quarter) squared + three-quarters f(x) = (x + o
a_sh-v [17]

The function in vertex form is f(x)=(x+\frac{1}{2})^{2}+\frac{3}{4} ⇒ 3rd answer

Step-by-step explanation:

The vertex form of the quadratic function f(x) = ax² + bx + c is

f(x) = a(x - h)² + k, where

  • a is the coefficient of x²
  • (h , k) are the coordinates of the vertex point
  • h=\frac{-b}{2a} , wher b is the coefficient of x
  • k = f(h), that means value f(x) when x = h

∵ f(x) = x² + x + 1

∴ a = 1 , b = 1

∵ h=\frac{-b}{2a}

- Substitute the values of a and b to find h

∴ h=\frac{-1}{2(1)}

∴ h=\frac{-1}{2}

Substitute the value of x in f(x) by the value of h to find k

∵ f( \frac{-1}{2} ) = (\frac{-1}{2})^{2}+\frac{-1}{2}+1

∴ f( \frac{-1}{2} ) = \frac{1}{4}-\frac{1}{2}+1

∴ f( \frac{-1}{2} ) = \frac{3}{4}

- k is the value of f(x) when x = h

∵ h = \frac{-1}{2}

∴ k = f( \frac{-1}{2} )

∴ k = \frac{3}{4}

Substitute the values of a, h and k in the vertex form

∵ f(x) = a(x - h)² + k

∵ a = 1 , h=\frac{-1}{2} , k=\frac{3}{4}

∴ f(x)=1(x-\frac{-1}{2})^{2}+\frac{3}{4}

∴ f(x)=(x+\frac{1}{2})^{2}+\frac{3}{4}

The function in vertex form is f(x)=(x+\frac{1}{2})^{2}+\frac{3}{4}

Learn more:

You can learn more about the quadratic functions in brainly.com/question/9390381

#LearnwithBrainly

7 0
3 years ago
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