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Sphinxa [80]
3 years ago
13

Find f(-2) for the function f(x)=x^2-6

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
4 0
You would subitute -2 for x in the equation
f(-2)=x^2-6
PEMDAS so exonents
-2^2-6
negative times a negative= positive
4-6
f(-2)=-2


f(x) means that you subsitute x for x in the equation  exg
f(1)=x+2 means f(1)=1+2
f(4)=x+2 means f(4)=4+2
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im confused with this please help i dont get any answers, it is about rounding, not sure why this question is confused
Shkiper50 [21]

Step-by-step explanation:

<u>13,789:</u>

Tens: 13,790

Hundreds: 13,800

Thousands: 14,000

Ten thousands: 10,000

<u>24,173:</u>

Tens: 24,170

Hundreds: 24,200

Thousands: 24,000

Ten thousands: 20,000

<u>861,630:</u>

Tens: 861,630

Hundreds: 861,600

Thousands: 862,000

Ten thousands: 860,000

7 0
3 years ago
A pharmacist put 4.536 ounces of vitamin pills into bottles. She put 0.042 ounce of vitamin pills into each bottle.
ValentinkaMS [17]

Answer:

108 bottles

Step-by-step explanation:

4.536 divided by .042 equals 108

5 0
3 years ago
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What is the equation of a horizontal line passing through the point (2, 10)?
Romashka [77]
Answer:

O x = 2

Step-by-step explanation:

Only x-intercepts will make the line horizontally and x = 2 is the line that passes through the point (2, 10)
7 0
3 years ago
Solve the following equations;-<br><br> x - 9 /√x + 3 =1
fgiga [73]

Answer:

13 , 6.

Step-by-step explanation:

A equation is given to us and we need to find out the value of x . The given equation to us is ,

\sf\implies \dfrac{ x -9}{\sqrt{x+3}}= 1

Cross multiply ,

\sf\implies x - 9 =\sqrt{ x +3}

Squaring both sides ,

\sf\implies (x - 9)^2 = x + 3

Simplify the whole square ,

\sf\implies x^2+9^2-2.9.x = x +3 \\

\sf\implies x^2+81 - 18x = x -3

Add 3 and subtract x on both sides ,

\sf\implies x^2 -18x-x +81-3=0

Simplify ,

\sf\implies x^2 -19x +78=0

Split the middle term of the quadratic equation,

\sf\implies x^2-13x-6x+78=0

Take out common ,

\sf\implies x( x -13)-6(x-13)=0

Take out ( x -13 ) as common ,

\sf\implies ( x -13)(x-6)=0

Equate both factors to 0 ,

\sf\implies \boxed{\pink{\sf x = 13,6}}

<u>Hence</u><u> the</u><u> </u><u>value</u><u> of</u><u> </u><u>x</u><u> is</u><u> </u><u>1</u><u>3</u><u> </u><u>or </u><u>6</u><u> </u><u>.</u>

7 0
3 years ago
If Landon checks his pulse for 12 minutes, what is his rate if he counts 1560 beats?
Lynna [10]

It is 130 beats per minute.

Step-by-step explanation:

Just divide 1560 by 12.

7 0
3 years ago
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