Answer:
0
Step-by-step explanation:
The opposite of 12 is -12, and 12+(-12)=12-12, or 0.
B. 7.2
Step-by-step explanation:
-15.5+7.2=(-8.7) and vice versa.
Answer:
B) 8:9
Step-by-step explanation:
Please refer to the attached image for explanations
<span><span><span>87</span>x−<span>34</span>y=<span>72</span></span><span><span>87</span>x-<span>34</span>y=<span>72</span></span></span>To write a linear equation in standard form, move each variable term to the left side of the equation and simplify.
<span><span>Ax+By=C</span><span>Ax+By=C</span></span>Simplify each term.
Tap for more steps...<span><span><span>8x</span>7</span>−<span><span>3y</span>4</span>=<span><span>72</span></span></span>
Answer:
55 years old
Step-by-step explanation:
1. Born 5 years after her husband
h -5 = c
twice as old as son
h-5 /2 = s
s = 25
h -5 /2 = 25
h-5 = 50
50+5 = 55