The swimming pool is open when the high temperature is higher than 20°c. lainey tried to swim on monday
and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high
temperature was 30°c on monday, but decreased at a constant rate in the next 3 days.
write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday
to thursday.

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

i will with my problems and all the other things that need to   be on by the way

step-by-step explanation:

step-by-step explanation: