AnswersIntegrated Math II FullUnknown Leg Lengths in Right Triangles

Unknown Leg Lengths in Right Triangles — Unit test Answers

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4

Jesse and Mark are jogging along the route shown at a rate of 12 miles per hour. They start by jogging south along Capitol Street for 1 mile, then turn east on H Street and jog for 1.75 miles. At that point, Jesse is tired and decides to walk home along Florida Avenue at a rate of 5 miles per hour. Mark plans to jog back the way they came. Jesse wants to find out who will arrive home first and by how much time. Which statements should he consider when solving the problem? Check all that apply.

Question illustration
A
Jesse will walk home a distance of approximately 2.0 miles as found by evaluating and then .
Option A
B
Jesse will take about 0.4 hours to walk the rest of the way home as found by .
Option B
C
Jesse will walk home a distance of approximately 2.25 miles as found by and then .
Option C
D
Mark will jog home a distance of 2.75 miles.
E
It will take Mark about 0.23 hours to jog home as found by .
Option E
F
Mark will jog home a distance of 2.25 miles.
G
Mark will get home about 0.17 hours (or 10 minutes) sooner.
H
Mark will get home about 0.21 hours (or 12.5 minutes) sooner.
5

Which numbers are irrational? Check all that apply.

A
StartRoot 196 EndRoot
Option A
B
StartRoot 80 EndRoot
Option B
C
StartRoot 16 EndRoot
Option C
D
Pi
Option D
E
StartRoot 12 EndRoot
Option E
F
StartFraction 7 Over 18 EndFraction
Option F
9

Jillian said is irrational because it is a square root. Why is she incorrect?

Question illustration
A
Jillian is incorrect because the square root of .
Option A
B
Jillian is incorrect because a square root is always rational.
C
Jillian is incorrect because square roots of perfect squares are rational.
D
Jillian is incorrect because the decimal expansion of is a repeating decimal.
Option D
10

Carl is trying to determine the length of segment MN using the Pythagorean theorem. Step 1: Find the vertex of a possible right triangle. V(4, 1)Step 2: Find the leg lengths of the right triangle. NV = 7, MV = 5Step 3: Substitute the values into the Pythagorean theorem. Step 4: Solve for c. Which best describes the accuracy of Carl’s solution?

Question illustration
A
Carl’s work and answer are both entirely correct.
B
Carl’s answer is correct, but he incorrectly labeled the leg lengths in step 2.
C
Carl’s work and answer are incorrect. He choose a vertex, V, that does not make a right triangle with MN.
D
Carl’s work and answer are incorrect. He substituted and solved incorrectly.

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