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2 years ago

If f(x) = (3 + x) (x-3) what is f(a + 2)?

Mathematics

1 answer:

ipn [44]2 years ago

5 0

Answer:

(a^2)+4a-5

Step-by-step explanation:

(3+a+2)(a+2-3)

(a+5)(a-1)

use FOIL or box method

5a-5+(a^2)-a simplifyes to

(a^2)+4a-5

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The constant of proportionality is represented by what letter? Question 4 options: x y z k

pychu [463]

Answer:The constant of proportionality is represented by x.

Hope this helps.

6 0

3 years ago

6h + 4 = 8 solve for h

Greeley [361]

Answer: h=4/6

Step-by-step explanation:

6h=8-4

6h=4 /:6

h=4/6

6 0

3 years ago

Use elimination to solve each system if equation 3x+2y=0and x-5y=17

kotykmax [81]

Answer:

$y = -3$

$x=2$

Step-by-step explanation:

$3x + 2y = 0$

$x - 5y=17$

to use the elimination you have to make one of the numbers same

$3(x-5y=17)$

and you would have to change the sign so that both of the 3x could cancel out.

New system of equation

$3x + 2y = 0$

$-3x+15y=-51$

$17y=-51$

$y = -3$

so we know the y value so now you could find the x value take one equation

$x - 5y=17$

$x +15=17$

$x = 2$

you could try it with both of the equations

$3x + 2y = 0$

$3x + - 6=0$

$3x-6=0$

$3x=6$

$x=6/3$

$x=2$

6 0

3 years ago

Andy says she splits her time on her homework as follows: 45 percent on math, 20 percent on science, 18 percent on social studie

vlabodo [156]

Answer:

45 hours on math, 20 on science, 18 on soc st, and 17 on la

Step-by-step explanation:

percents are how many out of one hundred

8 0

3 years ago

Write the equation of a piecewise function with a jump discontinuity at x =3. Then, determine which step of the 3-step test for

seraphim [82]

Answer:

Here's a possible example:

Step-by-step explanation:

$f(x) =\begin{cases} x & \quad x < 3\\x+3 & \quad x \geq 3\\\end{cases}$

Each piece is linear, so the pieces are continuous by themselves.

We need consider only the point at which the pieces meet (x = 3).

$\displaystyle \lim_{x \longrightarrow 3^{-}} f(x) = \lim_{x \longrightarrow 3^{-}} x = 3\\\\\displaystyle \lim_{x \longrightarrow 3^{+}} f(x) = \lim_{x \longrightarrow 3^{+}} x+3 = 6\\\\f(3) = x + 3 = 6\\\\\displaystyle \lim_{x \longrightarrow 3^{-}} f(x) \neq f(3)$

The left-hand limit does not equal ƒ(x), so there is a jump discontinuity at x =3.

5 0

3 years ago