Johnny has 27 buttons. he gives away b buttons. choose the expression that shows the number of buttons johnny has left. b,27,bplus27,or27-b

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.

Statement reason 1. δabc is similar to δced. given 2. 3. definition of slope 4. slope of slope of definition of slope 5. slope of × slope of multiplying the slopes 6. slope of × slope of substitution property of equality 7. slope of × slope of simplifying the right side the table contains the proof of the relationship between the slopes of two perpendicular lines. what is the reason for statement 2? a. parallel line segments that meet a common perpendicular line are proportional in length. b. the lengths of vertical and horizontal sides in congruent triangles are in a common ratio. c. trigonometric identities determine the lengths of the legs in a right triangle. d. corresponding side lengths in similar triangles are proportional in length.

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale