ms. Let $$ w=-1, y=3, z=5 .-15= $$ 13. $$ \frac{3 z+5}{w z}=-4 $$ 14. $$ \frac{6 w}{y}+\frac{z}{w}=-7 $$ 15. $$ 25-2 y z= $$

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UpStudy AI · Accepted Answer

**Step 13:**  
Substitute $$ z = 5 $$ and $$ w = -1 $$ into the expression:
$$
\frac{3z+5}{wz} = \frac{3(5)+5}{(-1)(5)}
$$
Calculate the numerator:
$$
3(5)+5=15+5=20
$$
Calculate the denominator:
$$
(-1)(5)=-5
$$
Thus,
$$
\frac{20}{-5}=-4
$$

**Step 14:**  
Substitute $$ w = -1 $$, $$ y = 3 $$, and $$ z = 5 $$ into the expression:
$$
\frac{6w}{y}+\frac{z}{w} = \frac{6(-1)}{3}+\frac{5}{-1}
$$
Evaluate each term:
$$
\frac{6(-1)}{3}=\frac{-6}{3}=-2 \quad \text{and} \quad \frac{5}{-1}=-5
$$
Sum the terms:
$$
-2+(-5)=-7
$$

**Step 15:**  
Substitute $$ y = 3 $$ and $$ z = 5 $$ into the expression:
$$
25-2yz = 25-2(3)(5)
$$
Calculate:
$$
2(3)(5)=30
$$
Thus,
$$
25-30=-5
$$
**Step 13:** $$ \frac{3(5)+5}{(-1)(5)} = -4 $$ **Step 14:** $$ \frac{6(-1)}{3} + \frac{5}{-1} = -7 $$ **Step 15:** $$ 25 - 2(3)(5) = -5 $$

ms. Let
13.
14.
15.

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ms. Let 13. 14. 15.