Answer:
Step-by-step explanation:
Second one is faster, so let's get rid of it first.
Divide by 2 to make numbers easier, and we get
. You should recognize 81 is 9 squared, and both 
and 
, when squared, give 81, we have our solution.
Now the first. I can't spot any quick trick to solve it, so quadratic formula it is. Let's rememer it: if
then
Let's bring the first equation in the standard form and calculate the quantity over the square root (usually called with the greek letter delta, 
) to the side.
now we can apply the formula:
Let's split the two cases now
Answer:
You could answer this two ways.
Step-by-step explanation:
Method 1: Set up proportion
x/40=55/100
Cross-multiply and you will get..
2200=100x
x=22
Method 2: Use decimals
As we saw in the first method, 55 percent is equal to 55/100. 55/100 is equal to 0.55.
You can multiply 0.55 and 40 to get the answer as well.
0.55 times 40 is 22.
Hope this explanation helped! ☺️
8n−7y−12n+5−3y
=8n+−7y+−12n+5+−3y
Combine Like Terms:
=8n+−7y+−12n+5+−3y
=(8n+−12n)+(−7y+−3y)+(5)
=−4n+−10y+5
Step-by-step explanation:
you just need to put each in the calculator. I'm not so sure what an ALEKS calculator is
Answer:
The interest amount is $135 dollars.
Step-by-step explanation:
