Answer:
13
Step-by-step explanation:
Set Susan's present age as x, her age from 3 years ago as x-3, and her age in three years as 2(x-3)
Since her age in seven years = 2 times as old as she way 3 years ago, set up the equation:
x+7 = 2(x-3)
x+7 = 2x-6
x = 13
<span>1.2555⋅<span>10^<span>−<span>6
</span></span></span></span>Explanation:
<span><span><span>(1.08⋅<span>20<span>−3</span></span>)</span><span>(9.3⋅<span>10<span>−3</span></span>)</span>=<span>1.08<span><span>(20)</span>3</span></span>⋅<span>9.3<span><span>(10)</span>3</span></span>=<span><span>1.08⋅9.3</span><span>8⋅<span>106</span></span></span>=1.2555</span><span>⋅<span>10<span>−6</span></span></span></span>
Answer:
x= 5.75$
Step-by-step explanation:
23 divided by 4 = 5.75$ (without the discount it is 10.75$)
