To find the answer, we can first find the age of Rolando in four year:
17+4
=21
We can then proceed to find the current age of Marisa,which is 3/2 of Rolando’s age calculated above:
Let Marisa’s age be y.
3/2 y =21
y = 21 × 2/3
y = 42/3
y = 14
Therefore Marisa is currently 14 years old.
In three years, Marisa would be:
14+3
=17
Therefore, she will be 17 years old.
Hope it helps!
Answer: 9 months
Explaination: First subtract the total price which is $65 and subtract it by the final amount of money he had which is $38. Doing this you should get $27. To find the number of months divide it by 3 and you should get 9 months! Hope this helps! :)
X = 7/4
y = 3/2
z = -5/4
Step 1: Multiply first equation by
<span>−3</span> and add the result to the third equation. The result is:
<span><span> x</span><span><span>+ 2 y</span><span>+ 3 y</span><span>− 8 y</span></span><span><span>− z</span><span>− 2 z</span><span>+ 8 z</span></span><span><span> = 6</span><span> = 7</span><span> = −22</span></span></span>
Step 2: Multiply second equation by 4 and add the result to the third equation. The result is:
<span><span> x</span><span><span>+ 2 y</span><span>+ 3 y</span><span>+ 4 y</span></span><span><span>− z</span><span>− 2 z</span></span><span><span> = 6</span><span> = 7</span><span> = 6</span></span></span>
Step 3: solve for y.
<span><span><span>4 y</span>y</span><span><span>=6</span><span>=<span>32</span></span></span></span>
Step 4: solve for z.
<span><span><span>3z−2z</span><span>3⋅<span>32</span>−2z</span>z</span><span><span>=7</span><span>=7</span><span>=−<span>54</span></span></span></span>
Step 5: solve for x by substituting <span>y=<span>32</span></span> and <span>z=−<span>54</span></span> into the first equation.
Two hundred fortyfour thousand three hundred six
