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3 years ago

Determine the domain of the function. f(x)= sqrt of 7+x

Mathematics

2 answers:

irakobra [83]3 years ago

5 0

Answer:

x∈R {x ≥ -7}

Step-by-step explanation:

The domain of the function can only include real numbers. This means whatever happens under the square root sign (i.e. the radicand) cannot be less than 0 (since you can't take the square root of a negative number).

To find the domain, set the radicand ≥ 0:

7 + x ≥ 0

x ≥ -7

Nezavi [6.7K]3 years ago

4 0

Answer:

Df=[-7,∞)

Step-by-step explanation:

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Find the value of<br> 3a²-4ab-26² when A= -1 and b-4

nata0808 [166]

Answer:

-657

Step-by-step explanation:

$a= -1\\b= 4\\$

Substituting the value of a and b

$3a^{2}-4ab-26^{2} \\3(-1)^{2} -4(-1)(4)-676\\3-4(-4)-676\\3+16-676\\19-676\\-657$

The value of 3a²-4ab-26² is -657

4 0

4 years ago

Segment AB has and endpoint at A (2,5) and a mod point at M (4,0), find the other endpoint (B).

steposvetlana [31]

Answer:

The other endpoint B= (6, -5)

Step-by-step explanation:

Given:

One end point A= (2,5)

Mid point M = (4,0)

To Find:

The Other point =?

Solution:

According to midpoint formula, if (x1, y1) and (x2, y2) are two ends of a line then it’s midpoint is given by :

$M(x,y)= \frac{x1+ x2}{2} ,\frac{y1+ y2}{2}$

Using the above formula

$4=\frac{2+x_2}{2}$ ..................................(1)

$0=\frac{5+y_2}{2}$ ..................................(2)

Solving equation(1)

tex]8=2+x_2[/tex]

$x_2=8-2$

$x_2=6$

Solving equation(2)

$0\times 2=\frac{5+y_2}{2}$

$0=5+y_2$

$-5=y_2$

Thus $x_2=6$ and $y_2 =-5$

6 0

3 years ago

N kmjknxcizfdhzkjxfsbvdnkjbchsgnfdb,mfvs cfnbgsuhkjfcbm

kifflom [539]

Answer:

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Step-by-step explanation:

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3 years ago

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aliina [53]

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n200080 [17]

Answer:

Notice that for any increase, x * l or x * r, in length or radius, the increase in surface area is x squared (x2) and the increase in volume is x cubed (x3).

Step-by-step explanation:

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3 years ago