Answer:
3a-10
Step-by-step explanation:
<h2>MAYBE IT HELPS</h2>
Can salvage 15c+ -15c is 0 + 8 is still 0
Step-by-step explanation:
The first 9 (leftmost) has a value 100 times the value of the second 9 (rightmost).
The first 9 is in the 10,000s place and represents 90,000.
The second 9 is in the hundreds place and represents 900.
90,000 is one hundred times 900.
A) 0.59 uses 2 sig figs
B) 100.6 uses 4 sig figs (the zeros in this case are significant)
C) 98.42 uses 4 sig figs
D) 1.045 uses 4 sig figs (the zero is between other sig figs so it's significant)
Every choice but choice A has 4 sig figs. So the answers are B, C, and D
Ok so in order to do this, you have to set up an equation. Let's make a=the score of the first test and b=the score of the second test. (You can choose different variables, it doesn't matter.) It says the sum of the two equals 170. So, a+b=170. It also says that the score of the first was 6 less than the second. This can be shown as a=b-6. Now you can plug this in for a in your original equation. It will look like:
(b-6)+b=170
You can solve for b.
2b-6=170
2b=176
b=88
Since you want a, plug into either equation for b. I'll use the second one.
a=88-6
So, a=82
