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OverLord2011 [107]
3 years ago
14

How to do this question?

Mathematics
1 answer:
ASHA 777 [7]3 years ago
6 0

Answer:

40

Step-by-step explanation:

2x² - 5y + 7 when x = 2 and y = -5

2(2)² - 5(-5) + 7

= 2(4) -5(-5) + 7

= 8 + 25 + 7

= 40

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How do I find x (area of rectangle & trapezium?
lesantik [10]
Rectangle Formula: a = lw (Area = Length x Width) 

Trapezium: A= a+b/2h (Area = Area + Base / 2 x h) 

I hope this helps. :)
5 0
3 years ago
A cab driver charges a 15 flat fee and 1.50 per mile. How many miles can you go with 30 dollars
Vika [28.1K]
Since it's 1.5 dollars per mile, you add 1.5 dollars for every mile and the amount of money total is 1.5m if m represents the amount of miles. In addition, since the flat tax is 15, you add 15 to it to get 1.5m+15. After that, since you only have 30 dollars, the amount of money is 30=15+1.5m. Subtracting 15 from both sides, we get 15=1.5m. Lastly, we divide both sides by 1.5 to get m=10
7 0
3 years ago
At which root does the graph of f(x) = (x – 5)3(x + 2)2 touch the x axis?
LuckyWell [14K]
We have that
f(x) = (x – 5)³(x + 2)²

we know that
<span>the roots can touch or cross the x axis

</span>The way you can tell if the graph is going to cross the x-axis or just touch the x-axis is by looking at the power of the factor.

(x - 5)³ has a power of 3 which is an ODD number. An ODD power means that the graph will cross through the x-axis.

(x + 2)² has a power of 2 which is an EVEN number. An EVEN power means that the graph will touch the x-axis.

therefore

the answer is
<span>the graph of f(x) touch the x axis for the root x=-2
</span>
see the attached figure

5 0
3 years ago
Read 2 more answers
Calculate the slope of a line that passes through the points (9, 3) and (19,-17). ​
Zigmanuir [339]

Answer:

  • -2.6 is the slope.
<h3><u>Step-by-step explanation:</u></h3>
  • Slope = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }
  • => \frac{-17-9}{19 - 9}
  • => -26/10
  • => -2.6
<h3><u>Conclusion:</u></h3>

Therefore, <u>-2.6 is the slope.</u>

Hoped this helped.

BrainiacUser1357

5 0
2 years ago
College charges reservation fee of $43 plus $8.40 per hour. Class wants to spend at most $93.40 what is the at most sign
musickatia [10]

Answer:

6

Step-by-step explanation:

y=mx+b

93.40=8.40x+43

the 93 is the amount we want to get to, 8.40 represents the value of each sign and the 43 is the original cost

8 0
3 years ago
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