Answer:
n = -12
Step-by-step explanation:
(-2/3)n + 7 = 15
(-2/3)n+7-7 = 15-7 Subtract by 7 on both sides
(-2/3)n = 8 Multiply by the reciprocal of the fraction, which is
(-2/3)n*(-3/2) = 8(-3/2) This makes it so you get n *1 and isolates n.
n = -24/2 = -12
Answer:

Step-by-step explanation:
FH is the combined lengths of FG and GH.
In an equation, this is:

We already know that FG is 8 and that GH is 14. Thus:

Add:

So, the length of FH is 22.
And we're done!
In five hours the temperature would be -13 degrees F. Hope this helps.
The height would be 7cm because the area of the base (the triangle face) is 20cm². You would then divide the volume by the area of the base to get the height. 140/20=7cm
Hope this helped!