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McGraw Hill Glencoe Algebra 2, 2012

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McGraw Hill Glencoe Algebra 2, 2012 View details

4. Law of Sines

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Exercise 69 Page 821

Substitute $6,$ $- 4,$ $1.5,$ and $\frac{3}{4}$ for $w,$ $x,$ $y,$ and $z .$ Then, simplify.

$26$

Practice makes perfect

To evaluate the given expression for

w = 6,

x = - 4,

y = 1.5

and

z = \frac{3}{4},

we should substitute these values into the expression and simplify as much as possible.

w y + x z + w^{2} - x^{2}

SubstituteValues

Substitute values

(6) (1.5) + (- 4) (\frac{3}{4}) + 6^{2} - (- 4)^{2}

Multiply

9 + (- 4) (\frac{3}{4}) + 6^{2} - (- 4)^{2}

Calculate power

9 + (- 4) (\frac{3}{4}) + 36 - 16

$(- a) b = - a b$

9 - 4 (\frac{3}{4}) + 36 - 16

DenomMultFracToNumber

$4 \cdot \frac{a}{4} = a$

9 - 3 + 36 - 16

Add and subtract terms

26

Subchapter links

Check Your Understanding p.818

Practice and Problem Solving p.819-820

H.O.T. Problems p.820

Standardized Test Practice p.821

Spiral Review p.821

Skills Review p.821