Solve for z: -0.3z=-17.4-2.3z

z=-8.7

Step-by-step explanation:

-0.3z=-17.4-2.3z

10(-0.3z)=10(-17.4-2.3z)

-3z=-174-23z

20z=-174

z=-8.7

Check:

-0.3z=-17.4-2.3z

-0.3(-8.7)=-17.4-2.3(-8.7)

2.61=-17.4+20.01

2.61=2.61

let soccer = x and golf = y

part a

1st equation: x + y = 125

2nd equation: x = y +45

part b

replace x in the 1st equation with the 2nd one:

y + 45 + y = 125

simplify:

2y + 45 = 125

subtract 45 from each side:

2y = 80

divide both sides by 2:

y = 80/2

y = 40

she plays golf for 40 minutes.

part c

no because she plays soccer for 45 minutes longer than golf 40 +45 =   85 minutes, not 80 minutes.

search the worksheet up on the internet

step-by-step explanation:

it works trust me