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Setler [38]
3 years ago
7

If 3x^2+4x/2x+9=5 find x

Mathematics
1 answer:
Simora [160]3 years ago
4 0

° ∪ ° Hi there!

Let's solve your equation step-by-step.

3  x^{2} +   \frac{4x}{2} x + 9 = 5

Step 1) Simplify both sides of the equation.

5 x^{2} + 9 = 5

Step 2) Subtract 9 from both sides.

5 x^{2}  + 9 - 9 = 5 - 9

5 x^{2} = -4

Step 3) Divide both sides by 5.

\frac{5x^2}{5} =  \frac{-4}{5}

x^{2} =  \frac{-4}{5}

Step 4) Take the square root.

(This isn't something I can write the whole thing with the pretty writing.)

x = ± \sqrt  \frac{-4}{5}

Answer -

There are no real solutions.

We, unfortunately, do not have an x since there are no real solutions.

Hope this helps! :D

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HELP!!! Find the length of PM.
solniwko [45]

Answer:

Your answer is 7

Step-by-step explanation:

The two lines are the same length, so set the lengths equal to each other.

5x-3=11-2x

add 2x

7x-3=11

add 3

7x=14

divide by 7

x=2

Then you just plug x in

5(2)-3

multiplication first

10-3

subtraction

7

That is your answer

4 0
3 years ago
Read 2 more answers
Identify the 12th term of the arithmetic sequence in which a7 = 40 and a18 = 106.
Lady_Fox [76]

we are given

airthematic sequence

we can use nth term formula

a_n=a_1+(n-1)d

n is number of terms

an is nth term

d is common difference

a1 is first term

We are given

a7=40

we can use it

a_7=a_1+(7-1)d

40=a_1+6d

a_1+6d=40

a18 = 106

a_1_8=a_1+(18-1)d

a_1+17d=106

we can subtract both equations

a_1+17d-a_1-6d=106-40

11d=66

d=6

now, we can find a1

a_1+6d=40

we can plug d=6

a_1+6*6=40

a_1=4

12th term:

a_1_2=a_1+(12-1)d

now, we can plug values

a_1_2=4+(12-1)*6

a_1_2=4+66

a_1_2=70

so, 12th term is 70...........Answer

3 0
3 years ago
Can someone help me solve these three problems please??
Tasya [4]
I'll solve 21, and you then should be able to solve the rest on your own!

Since ADC is 135, that means that that whole angle is 135 degrees. In addition, since angles ADB and BDC add up to ADC, we get ADB+BDC=ADC=135=11x+9+7x=18x+9. Subtracting 9 from both sides, we get 126=18x. Dividing both sides by 18, we get x=7. Plugging that into 11x+9=BDC, we get 11*7+9=77+9=86
4 0
3 years ago
Write the equation 0.3x 2 + 5x - 7 = 0 in general form and then choose the value of "b."
USPshnik [31]
The general form of a quadratic equation is that which is expressed in a form,
                                     ax² + bx + c = 0 
To write the equation in its general form, eliminate the decimal by multiplying the equation by 10. It now becomes,
                                        3x² + 50x - 70 = 0
The value of b is therefore 50 and the answer is the second choice. 
6 0
3 years ago
Read 2 more answers
What is the value of x?
Anna007 [38]

Answer:

4x= 40

Step-by-step explanation:

40/4 = 10

7 0
3 years ago
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