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riadik2000 [5.3K]

4 years ago

11

Help me plz i have 8 mins!!

2 answers:

romanna [79]4 years ago

3 0

Remember the PEMDAS method. The operation inside the parenthesis should be done first. The sum of 2 and 7 is 9, so this leaves us with 5(9), which is 45. If you look at the last option and apply a similar method, this makes 10 + 35, which is also 45. Your answer is the last option.

tiny-mole [99]4 years ago

3 0

D. they both equal 45.

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What current flows through a hair dryer plugged into a 120-volt circuit if it has a resistance of 30

motikmotik

Ircuit contains a 1.5 volt battery and a bulb with a resistance of 3 ohms. Calculate the current. I = V ÷ R = 1.5V ÷ 3Ω = 0.5A. 5. What current flows through a hair dryer plugged into a 120 Volt circuit

3 0

3 years ago

Read 2 more answers

Given g(x)=3/x^2+2x find g^-1(x)

attashe74 [19]

Answer:

Inverse function is: $g^{-1}x=\frac{-x\pm\sqrt{x(x+3)}}{x}$

Step-by-step explanation:

Given Given the function $g(x)=\frac{3}{x^2+2x}$

we have to find the inverse function of g

To find inverse following steps are:

Step 1: Replace g(x) with y

Step 2: Replace every x with a y and every y with x

Step 3: Solve the equation obtained from Step 2 for y.

Step 4: Replace y with g−1(x).

$g(x)=\frac{3}{x^2+2x}$

To find the inverse, let $y=\frac{3}{x^2+2x}$

Now, solve for x

$y(x^2+2x)=3$

$yx^2+2yx-3=0$

$x=\frac{-2y\pm\sqrt{4y^2-4y(-3)}}{2y}$

$x=\frac{-2y\pm\sqrt{4y^2+12y}}{2y}$

$x=\frac{-2y\pm2\sqrt{y^2+3y}}{2y}$

$x=\frac{-y\pm\sqrt{y(y+3)}}{y}$

Replace every x with a y and every y with x , we get

$y=\frac{-x\pm\sqrt{x(x+3)}}{x}$

Replace y with g−1(x).

$g^{-1}x=\frac{-x\pm\sqrt{x(x+3)}}{x}$

So inverse function is: $g^{-1}x=\frac{-x\pm\sqrt{x(x+3)}}{x}$

6 0

3 years ago

There are 1/2 as many eighth graders in the choir as seventh graders. There are 48 eight graders. Write and solve an equation to

raketka [301]

Answer:

Step-by-step explanation:

Let x represent the number of seventh graders in the choir:

48=x/2

x=96

5 0

3 years ago

Please solve this questions I don't know what to write....

Step2247 [10]

E.(12+6)÷(6-3)

hope it help to you

5 0

3 years ago

Read 2 more answers

What is <br>-1(9)<br>14(-2)<br>(-9)(-6)<br>(-2)50 <br>please help

yaroslaw [1]

okay so you wanna do

-1 times 9 = you get -9

same for 14(-2)= -28

-9 times -6 =54

so then you do -2 times 50 then you get -100

plz mark Brainliest !!!

thanks!!!

8 0

3 years ago