Step-by-step explanation:
5 (18 - y) when y=6
5 (18 - 6)
5 × 18 - 5× 6
90 - 30
60
24 hours
Step-by-step explanation:
1 hour
Painter1 1/40
Painter2 1/60
together 1/40+1/60=5/120=1/24
Answer:
, 
Step-by-step explanation:
How much longer did he study for his math test?



An equation for this would resemble this:

Now before we get into any equation solving let's get the <em>denominators </em>equal to each other. we can do this by <em>multiplying </em>the <em><u>numerator</u></em> and <u><em>denominator</em></u><em> </em>by 2. 
Now we can solve the equation:

, as a mixed number
<em>plz mark me brainliest. :0</em>
Answer:
6x² - 7x - 20
Step-by-step explanation:
Use the so-called "FOIL" method of multiplying binomials:
First terms: 3x · 2x = 6x²
Outer terms: 3x · -5 = -15
Inner terms: 4 · 2x = 8 x
Last terms: 4 · -5 = -20
Then, after simplifying, we have 6x² - 7x - 20 (second answer choice)