Simplify 2+5 •(-9) -4 • 3+6•7

-13

Step-by-step explanation:

2 + 5 • (-9) - 4 • 3 + 6 • 7

~Multiply

2 - 45 - 4 * 3 + 6 * 7

~Multiply

2 - 45 - 12 + 6 * 7

~Multiply

2 - 45 - 12 + 42

~Subtract

-43 - 12 + 42

~Subtract

-55 + 42

~Add

-13

Best of Luck!

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.

4y - 6 + y^2 - 9 = y^2 + 4y - 15

y^2 term

terms

- terms

total of 3 terms when simplified

step-by-step explanation: