body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

McGraw Hill Glencoe Algebra 2, 2012

MH

McGraw Hill Glencoe Algebra 2, 2012 View details

8. Quadratic Inequalities

Continue to next subchapter

Exercise 74 Page 288

Start by multiplying the matrices by the corresponding scalars. Then, perform the subtraction.

- 28 & 60 20 & - 70

Practice makes perfect

We can see that the given matrices have the same dimensions, 2* 2. Multiplication by a scalar does not affect the dimension of a matrix, so it is possible to perform the addition and subtraction of the given matrices after multiplying them by scalars. We will start with the scalar multiplication.

- 2 5 & - 9 5 & 11 -6 3 &- 7 - 5 & 8

▼

Multiply matrices by scalars

Multiply matrix by - 2

(- 2)(5) & (- 2)(- 9) (- 2)(5) & (- 2)(11) -6 3 &- 7 - 5 & 8

Multiply matrix by 6

(- 2)(5) & (- 2)(- 9) (- 2)(5) & (- 2)(11) - (6)(3) & (6)(- 7) (6)(- 5) & (6)(8)

Multiply

- 10 & 18 - 10 & - 22 - 18 & - 42 - 30 & 48

Subtract matrices

- 10-18 & 18-(- 42) - 10 - (- 30) & - 22-48

Add and subtract terms

- 28 & 60 20 & - 70

Subchapter links

Check Your Understanding p.285

Practice and Problem Solving p.286-287

H.O.T. Problems p.287

Standardized Test Practice p.288

Spiral Review p.288

Skills Review p.288