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natali 33 [55]
3 years ago
15

Evaluate 3x^2+5, when x= -5 and y= -9

Mathematics
1 answer:
dangina [55]3 years ago
3 0

Step-by-step explanation:

3x {}^{2}  + 5

(3 \times  - 5) {}^{2}  + 5

- 15 {}^{2}  + 5

225 + 5

230

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Can anyone help me on this?
allochka39001 [22]

It’s been awhile since I’ve done a problem like this but I believe it’s solved as below:


The area of a circle is equal to πr2. That will tell you the entire area of the circle. Then you would need to divide that by 2 to get the area of the 180° arc.

So, the area of this circle is 153.94 square meters. If you divide that by 2 (since 180° is half of a circle) you would get 76.97 square meters.
8 0
3 years ago
What is the correct factorisation of?<br>X^2+6x+8​
MaRussiya [10]

Answer:

Step-by-step explanation:

Given that: x  

2

+6x+8

                 =x  

2

+4x+2x+8,        (split middle term)

                 =(x  

2

+4x)+(2x+8),    (group pair of terms)  

                 =x(x+4)+2(x+4),         (factor each binomials)

                 =(x+4)(x+2),              (factor out common factor (x+4)

Hence factors of x  

2

+6x+8 are (x+4)(x+2)

4 0
3 years ago
Read 2 more answers
The set of x values of a function, this is another name for domain
Naily [24]
The set of x values of a function is another name for domain. and the set of y values of a function is another name for range.

hope this helps, God bless!
5 0
3 years ago
If f(x)=-7x-3 and g(x)=√x-16 what is (f °g)(-2)
schepotkina [342]

Answer:

Not possible

Step-by-step explanation:

The notation (f °g)(-2) means f(g(-2)). You will substitute -2 into g(x) then substitute the value or equation that results into f(x).

g(-2) = √x - 16 = √-2 - 16

This is not possible because the value of -2 cannot be found in a square root. Square roots do not compute real roots for negative numbers.

3 0
4 years ago
Ms. Nina has 10 lbs of 25% sugar syrup. How much water does she need to add to make 10% sugar syrup
Inessa [10]
10*0.25=2.5
2.5/10*100=25 lbs
25-10=15 lbs
Nina need to add 15 lbs of water
7 0
4 years ago
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