Back to Tutor Intake Assessment: Choose equivalent forms to reveal properties

HSA.SSE.B.3 Tutor Intake — Equivalent Forms and Revealed Properties

This short check helps your tutor understand where to start. Answer each question on your own — no notes, but you may use a calculator for the last two sections. If you're not sure, give your best try. The goal is to find what to work on together, not to grade you.

Grade 9·10 problems·~15 min·Common Core Math - HS Algebra·standard·hsa-sse-b-3
Work through problems with immediate feedback
A

Concepts

1.

The quadratic f(x)=2(x1)(x3)f(x) = 2(x-1)(x-3) is written in factored form.
What information does this form reveal most directly?

2.

A student needs to find the x-intercepts (zeros) of
f(x)=x26x+8f(x) = x^2 - 6x + 8. Which equivalent form should the
student produce?

3.

A student needs to find the minimum value of
g(x)=x2+4x1g(x) = x^2 + 4x - 1. Which equivalent form should the
student produce?

B

Procedures

1.

Factor f(x)=x25x+6f(x) = x^2 - 5x + 6 to find its zeros.

The factored form is (x2)(xp)(x - 2)(x - p) for some value pp.
What is pp?

2.

Complete the square to write f(x)=x2+6x2f(x) = x^2 + 6x - 2 in vertex form.

Step 1: (x2+6x+)2(x^2 + 6x + \square) - \square - 2
Step 2: (x+3)2k(x + 3)^2 - k

What is the value of kk (the minimum value of the function)?

3.

A savings account earns 12%12\% annually, modeled by f(t)=(1.12)tf(t) = (1.12)^t
where tt is in years. To find the equivalent monthly growth factor,
use the identity (1.12)t=((1.12)1/12)12t(1.12)^t = \bigl((1.12)^{1/12}\bigr)^{12t}.

Rounded to four decimal places, (1.12)1/12(1.12)^{1/12} \approx   ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲   .

Enter your answer as a decimal (e.g., 1.00951.0095).

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