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Vesnalui [34]
3 years ago
11

Simplify: (x2 − 8x + 5) + (−3x2 + 5x − 9)

Mathematics
1 answer:
tekilochka [14]3 years ago
6 0

Combine like terms (those with same number of variables)


x² + (-3x²) = -x²

-8x + 5x = -3x

5 - 9 = -4


-x² - 3x - 4 is your answer



hope this helps

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I need this in less than 5 minutes :((
alexandr1967 [171]

Answer:

5!=120 ways

Step-by-step explanation:

1st colour 5 ways

2nd colour 4 ways

3rd colour 3 ways

4th colour 2 ways

5th colour 1 way

total no of ways = 5 × 4 × 3 × 2 ×1 =5! = 120 ways

3 0
3 years ago
Relatively few (7.6%) high school students said that they rarely or never wore a seat belt, whereas 41.4% reported having texted
Lubov Fominskaja [6]

Answer:

Check Explanation

Step-by-step explanation:

The amygdala is the brain's emotional center. It is responsible for instinctual thinking and impulse control. It develops during early teenage years and this means the amygdala is not developed to the optimal level during teenage years. This makes teenagers very prone to impulsive behavior.

Also, the prefrontal cortex which is responsible for decision-making skills and the ability to measure risks is not fully developed in the teenage child stage. This is why teenagers make poor decisions and aren't great at measuring risks thereby making riskier choices like using the phone while driving.

These two brain components are fully developed in adults hence, it is less likely for adults to make poor decisions like texting while driving, which is a riskier thing to do than not using a seatbelt.

Again, teenagers have this invincibility feeling where they feel like they are more active and can react faster to road dangers. This deceives them into making such riskier decisions.

The current world also has turned into something else where people (teenagers especially) strive to get the most current news information as they are happening. The need to stay connected to social media is another reason why teenagers can't stay off their phones.

Finally, the fact that public intervention programs and ad campaigns promoting seat-belt use way more than not using cell-phones use while driving also mean more people are more conscious about using seatbelts while driving than not using their cellphones. In recent times, the campaigns, laws and bans on use of phones while driving are just gaining prominence.

In conclusion, the combination of all these factors/reasons is why the percentage of teenage high school students who use phones while driving is way more than the percentage that don't use a seatbelt although texting while driving is arguably much riskier than not wearing a seat belt.

Hope this Helps!!!

5 0
3 years ago
Find the derivative using the limit process of f (x) = - 10x
zubka84 [21]

Answer:

\frac{d}{dx} f(x) =-10

General Formulas and Concepts:

<u>Calculus</u>

  • Derivative Notation
  • Definition of a Derivative: \lim_{h \to 0} \frac{f(x+h)-f(x)}{h}

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = -10x

<u>Step 2: Find Derivative</u>

  1. Substitute:                         \frac{d}{dx} f(x)= \lim_{h \to 0} \frac{-10(x + h)-(-10x)}{h}
  2. Distribute -10:                    \frac{d}{dx} f(x)= \lim_{h \to 0} \frac{-10x -10h-(-10x)}{h}
  3. Distribute -1:                      \frac{d}{dx} f(x)= \lim_{h \to 0} \frac{-10x -10h+10x}{h}
  4. Combine like terms:         \frac{d}{dx} f(x)=  \lim_{h \to 0} \frac{-10h}{h}
  5. Divide:                               \frac{d}{dx} f(x)=  \lim_{h \to 0} -10
  6. Evaluate:                           \frac{d}{dx} f(x)=-10
3 0
3 years ago
The product of two numbers is 713. The first number is 9 more than the second number. Which equation can be used to find x, the
Alina [70]
In this problem, it is given that the greater number is represented by x. With this, the smaller number which is 9 less than the greater number may be represented by x - 9. The product of the two numbers is 713 and may be expressed as 
 
                                           (x)(x -9) = 713

The equation above is the answer to the problem. 

3 0
4 years ago
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A debt greater than 20$ and less than 30$
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Answer:

A debt greater than 20$ and less than 30$ is 25$

Step-by-step explanation:

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5 0
4 years ago
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