What is the difference when 5x2 − 3x + 2 is subtracted from 4x2 − 7x + 9?
A) x2 − 4x + 7
B) −x2 − 4x + 7
C) 9x2 − 4x − 11
D) −9x2 − 4x + 7

 Letter Choice ( B):   -x^2   -  4x  +  7

Step-by-step explanation:

( 4x^2   -  7x  +  9 )   -  (  5x^2   -  3x  +  2 )

Remove Parentheses:  (a)  =  a

4x^2  -  7x  +  9  -  ( 5x^2  -  3x  +  2 )  

-   ( 5x^2  -  3x  +  2 ):     - 5x^2  +   3x  -  2

Simplify:

   4x^2  -  7x   +  9   -   5x^2   +   3x   -  2

Letter Choice ( B ):

 -X^2    -    4x    +     7

Hope That Helps!

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing

step-by-step explanation:

9) i can't see the angle so whatever it is just do this: cos(angle) x hypotenuse and then use that answer and they hypotenuse and plug it into this: (answer you just got)^2 + b^2 = (hypotenuse)^2. the first answer will be the answer of the adjacent side and the second answer after this equation will be the opposite side.

10) y = 14 x = √147 or 12.12435565

11) x = 4.8

12) x = 4.2

13) x = 9.3

14) pq: 13.2

qr : 17.6

angle p: 53º

15) angle c: 54.3º

angle a: 35.7º

16) h = 21040

v = 1841

step-by-step explanation:

10) 7/sin(30) = 14 = y

7^2 + b^2 = 14^2

49 + b^2 = 196

b^2 = 196 - 49

√b^2 = √147

x = √147

11) cos(70) x 14 = 4.788282007

x = 4.8

12) tan(25) x 9 = 4.196768923

x = 4.2

13) sin(31) x 18 = 9.270685348

x = 9.3

14) pq: sin(37) x 22 = 13.23993051

pq: 13.2

qr: cos(37) x 22 = 17.56998122

qr : 17.6

angle p: 180 - (37 + 90) = 53º

15) cos-1(7/12) = 54.31466529

angle c: 54.3º

angle a: 180 - (90 + 54.31466529) = 35.68533471

angle a: 35.7º

16) 4 x 5280 = 21120

cos(5) x 21120

h = 21039.63202

h = 21040

sin(5) x 21120

v = 1840.729287

v = 1841