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Marina86 [1]
2 years ago
15

If f(x) = -2x^2 + 3 then f(-5) = ??

Mathematics
1 answer:
Sladkaya [172]2 years ago
5 0

F(-5)= -2x^2+3

-5*-5=25

25*-2=-50

F=-50+3

F=-47

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6)Factor: x^2+1/3x+1/36
trasher [3.6K]

Answer:

(x+4)(x+9)=0. Your answer would be x=-4 and x=-9. Explanation:: (x+4)(x+9) x times x=x2 x(9)+x(4)=13x 4 times 9=36 = x2+13x+36.(x+4)(x+9)=0. Your answer would be x=-4 and x=-9. Explanation:: (x+4)(x+9) x times x=x2 x(9)+x(4)=13x 4 times 9=36 = x2+13x+36.

7 0
2 years ago
23.85 + 7.42 + 16.15
kramer

Answer:

47.42

Step-by-step explanation:

Try solving this way

 23.85

+07.42

+16.16

=======

47.42

4 0
2 years ago
Factorise this expression as fully as possible<br>4x²+x​
borishaifa [10]

You can only factor x out of both terms:

x(4x+1)

8 0
3 years ago
The table shows the relationship between the number of minutes Rodney spends practicing playing the piano p, and the number of m
vagabundo [1.1K]

<u>Answer-</u>

The equation that describes the pattern is,

\boxed{\boxed{y=2{x}+30}}

<u>Solution-</u>

P = Number of minutes Rodney spends practicing playing the piano

G = Number of minutes Rodney spends practicing playing the guitar

Taking P on x axis and G on y axis, the points are,

(0,30),(15,60),(30,90),(45,120)

Taking first two points i.e (0,30),(15,60), the line equation will be,

\Rightarrow \dfrac{y-y_1}{y_2-y_1}=\dfrac{x-x_1}{x_2-x_1}

\Rightarrow \dfrac{y-30}{60-30}=\dfrac{x-0}{15-0}

\Rightarrow \dfrac{y-30}{30}=\dfrac{x}{15}

\Rightarrow 15(y-30)=30{x}

\Rightarrow y-30=2{x}

\Rightarrow y=2{x}+30

Putting the other two points i.e (30,90),(45,120) in the equation, they also satisfy the equation. That means they are also on the same line y=2{x}+30.

From the result, it is evident that P and G are linearly related.

3 0
3 years ago
If two sides are 36 feet what length is the long side and what type of triangle is it?
Aleks04 [339]

Answer: maybe 50.9

Step-by-step explanation: we can use the pythagorean theorem A^+B^=C^

36 x36 = 1,296

1,296 + 1,296 = 2,592

square root of 2,592 = 50.911688245431421756860794071549 rounded to 50.9

so your answer maybe 50.9

5 0
2 years ago
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