City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was −3° c. what was the temperature of city a and city b on that day? your city a was 5° c, and city b was 4° c. city a was 3° c, and city b was −1° c. city a was 8° c, and city b was −3° c. city a was 5° c, and city b was −5° c.

City A = x

City B = y

1st equation: 4x-8 =3y

 2nd equation: x-2y = -3 , rewrite as x = 2y-3

replace x in eq. 1 with equation 2

4(2y-3) -8 =3y

8y-12-8=3y

8y-20 = 3y

-20 = -5y

y = -20/-5 = 4

x = 2y-3 = 2(4)-3 = 5

City A was 5° C, and City B was 4° C. 

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct

the height of the surface increases from the center out to the sides of the road

it is c!