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3 years ago

Does this represent a function?

Mathematics

1 answer:

attashe74 [19]3 years ago

8 0

It’s not a function

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If f(x) =x^2 + 4x and g(x) = 2x +4, find (fg)(1)

snow_lady [41]

Step-by-step explanation:

Set up the composite result function.

f(g(x))f(g(x))

Evaluate f(g(x))f(g(x)) by substituting in the value of gg into ff.

f(x2)=2(x2)−4f(x2)=2(x2)-4

Multiply 22 by x2x2.

f(x2)=2x2−4f(x2)=2x2-4

5 0

3 years ago

Which point lies on the circle represented by the equation (x+5) + (y-9) = 8

olga_2 [115]

Answer:

(-5,9+√8)

Step-by-step explanation:

There are two ways in which you can find a point that lies in the circle. One of them is to do y the subject of the formula, and another one is to determine the center of the circumference, and with the information of the radius, you can sum this value upward or downward.

the general equation of a circle is:

$(x-h)^2+(y-k)^2=r^2$

with center at (h,k)

you have the following equation:

$(x+5)^2+(y-9)^2=8\\\\h=-5\\\\k=9\\\\r=\sqrt{8}$

Then, the center is (-5,9)

if you sum the value of the radius in one of the fourth directions (up, down, left, right), for example upward you have

$(-5,9+r)=(-5,9+\sqrt{8})$

Then, one point that lies in the circle is (-5,9+√8)

3 0

3 years ago

The value of y varies directly with the value of x. When y = 24, x = 4. What is the value of x when y = 48?

Bogdan [553]

Answer:

24/6=4

48/6= 8

so x=8

Step-by-step explanation:

3 0

3 years ago

20 is what percent of 32 <br> Write as an equation

AlladinOne [14]

20% of 32= 6.4

20% x 32

20 /100 x 32
Reduce the fraction
1 /5× 32
=32/5
=6.4

8 0

3 years ago

Need help with this please

Sav [38]

Your going to have to use the distance formula for these questions which is the square root of (x sub 2 - x sub 1) + (y sub 2 - y sub 1). For number 1 your coordinates are (-5,5) and (1,-2). Substituting these values into the formula your answer for number 1 is 9.2.

4 0

3 years ago