Which values for a and b make the statement (a+6) (b-1)=0 true? a= -6,b=0 a=6,b=1 a= -6.b= -1 a=0,=b=0

The answers A, B, and C all work for this problem. The answer D is the only one that does not.

Step-by-step explanation:

When looking at two parenthesis being multiplied together and being equal to 0, we know that at least one of the parenthesis must be equal to 0 for it to be true. In A and C, the first parenthesis will be equal to 0 due to a = -6.

(a + 6)

(-6 + 6)

(0)

And in B, we can see that the second parenthesis would be equal to 0 due to b = 1

(b - 1)

(1 - 1)

(0)

Now we can try the D options, but will note that they do not work for either parenthesis.

(a + 6)(b - 1)

(0 + 6)(0 - 1)

(6)(-1)

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.