Simplify the following expressi a) 3x + 2 - 7y + x + 2y –
b) 2a + b + a + 3b
c) 4m + 7n + 5m - 5n
d) 2x2y + 5xy2 + 3x2y – 2
e) x2 + x + 2x2
Solution

a

Step-by-step explanation:

if im correct its a could be wrong

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

: )

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm