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riadik2000 [5.3K]
4 years ago
11

Help me plz i have 8 mins!!

Mathematics
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
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3 years ago
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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
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Answer:

Step-by-step explanation:

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

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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
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okay so you wanna do

-1 times 9 = you get -9

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

plz mark Brainliest !!!

thanks!!!

8 0
3 years ago
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