Answer:
$40.82
Step-by-step explanation:
Subtract $11.36 from $100 and you'll get $88.64 and then just subtract $47.82 and the answer is $40.82. Not sure if u know how to subtract but just line the decimals up and take the smaller number away from the bigger one so in this case it would just be 100-11.36=88.64 and since he spent more money it would be 88.64-47.82=40.82
I believe you are expected to simplify. To do this all you do is group like terms (x, x², x³ etc.) and then simplify the coefficients.
13. 10z + 7z - 19z² - 5z² - 17z
first you can rearrange and group like terms (remember the bring the sign in front of each term with it). I would do it like this:
-19z² - 5z² +10z + 7z - 17z
Now simplify the coefficients:
-24z² + 0z
you can omit the 0z and your simplified answer is
-24z²
Main thing to remember here is that z and z² cannot be simplified together, nor can any variable that has an exponent because the exponent makes them differ.
Answer: Each classmate got 9 pencils
Step-by-step explanation: if you divide 8 from 75, you get 9 pencils for each classmate and 3 for Jessica to keep.
Answer:
The first car was traveling 70 mph, while the second was driving 50 mph.
Step-by-step explanation:
Set the cars as a proportion:
![\frac{210}{x + 2} = \frac{150}{x}](https://tex.z-dn.net/?f=%20%5Cfrac%7B210%7D%7Bx%20%2B%202%7D%20%20%3D%20%20%5Cfrac%7B150%7D%7Bx%7D%20)
X represents the speed of the second car. By cross multiplying, you get the following equation:
![210x = 150(x + 20)](https://tex.z-dn.net/?f=210x%20%3D%20150%28x%20%2B%2020%29)
You solve by distributing 150 to get 210x = 150x + 3000.
Solving for x gets you 50.
That means the first car was going at 50 mph. Adding 20, you get 70 as the speed for the second car.
Answer:
-21 is the answer , hope it helps
Step-by-step explanation: