Multiple: 45 * (-3) = 4 · (-3)5 · 1 = -125 = -2.4 · 51 · 5
Multiply both numerators and denominators. Result fraction keep to lowest possible denominator GCD(-12, 5) = 5
Divide: -125 : 4 = -125 · 14 = -12 · 15 · 4 = -1220 = -35
To divide one fraction by another, invert (turn upside-down) the second fraction, then multiply.
Answer:
A: Diane earns 200 + (10×20)= 400
B: Darryl earns (400-250)/20= $7.50 per hour
100 percent sure it's the first one
S + A = 450
$4S + $6A = $2340
S + A = 450
-6(S + A = 450)
-6S +-6A = -2700
4S + 6A = 2340
-2S = -360
-2S/-2 = -360/-2
S = 180
S + A = 450
180+ A =450
180-180 + A = 450-180
A = 270
Check
$4S + $6A = $2340
$4(180) + $6(270) = $2340
$720 + $1620 = $2340
$2340 = $2340