Answer:

Step-by-step explanation:

280*3= 840
3 journals is about 840 grams
Answer:
<h2>z = 15</h2>
Step-by-step explanation:

<u>Cross multiply </u>
That's

<u>Send 15 to the right side of the equation</u>

Divide both sides by 15

We have the final answer as
<h3>z = 15</h3>
Hope this helps you
A. If the slopes of two lines are negative then the reciprocals, of the lines are perpendicular.