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2 years ago

Which expression has the same value as 3x+1 when x=4

Mathematics

2 answers:

fomenos2 years ago

5 0

Answer:

13.

Step-by-step explanation:

3x+1

x=4

Substitute x for 4

So, that would be 3*4+1

Now we multiply 3 and 4 to get 12. Then we add in the 1.

Mars2501 [29]2 years ago

3 0

<h2>Answer:</h2>

5 x - 7

<h2>Step-by-step explanation:</h2>

3 × 4 + 1 = <em>13</em>

So, 5 x - 7 (x = 4)

= 5 × 4 - 7

= 20 - 7

= <em>13</em>

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Use the quadratic formula to solve the equation <br> 25x^2-30x+25=0

Reika [66]

Answer: $x=\frac{3}{5}+i\frac{4}{5},\:x=\frac{3}{5}-i\frac{4}{5}$

Step-by-step explanation:

$25x^2-30x+25=0$

$x_{1,\:2}=\frac{-\left(-30\right)\pm \sqrt{\left(-30\right)^2-4\cdot \:25\cdot \:25}}{2\cdot \:25}$

$\sqrt{\left(-30\right)^2-4\cdot \:25\cdot \:25}$

$=\sqrt{30^2-4\cdot \:25\cdot \:25}$

$=\sqrt{30^2-2500}$

$=i\sqrt{2500-30^2}$

$=40i$

$x_{1,\:2}=\frac{-\left(-30\right)\pm \:40i}{2\cdot \:25}$

$x_1=\frac{-\left(-30\right)+40i}{2\cdot \:25},\:x_2=\frac{-\left(-30\right)-40i}{2\cdot \:25}$

$x=\frac{3}{5}+i\frac{4}{5},\:x=\frac{3}{5}-i\frac{4}{5}$

8 0

2 years ago

How is shading a grid to show 1 tenth different from shading a grid to show 1 hundredth?

soldier1979 [14.2K]

If you have a grid with a hundred units and you need to show 1 hundredth (or 1%) you shade in 1 unit. If you need to show a tenth (or 10%) you shade 10 Units. I would need a picture of the grid to help any further.

6 0

2 years ago

Read 2 more answers

Which product is negative?

BigorU [14]

Answer:

the first one is negative

Step-by-step explanation:

1= -168

2= 360

3= 0

4= 360

a negative times a negative is a positive, 1 has 3 negatives tho so its gonna be a negative. 3 would be the other one but it has a zero making the answer 0

4 0

3 years ago

The length of a living room is 12 feet and its width is 10 feet. The length of the room is being expanded by x foet. Select all

Wewaii [24]

Answer:

You simply just do 12 multiplied by 10 which will give you 120m^2

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2 years ago

Solve for x: 3 over 3x+ 1 over x+4= 10 over 7x

hram777 [196]

Answer:

Step-by-step explanation:

3/3x + 1/x+4 = 10/7x

3/3x + 1/x+4 = 10/7x , x=0,x=-4

1/x + 1/x+4 = 10/7x

1/x + 1/x+4 - 10/7x = 0

7(x+4)+7x-10(x+4) / 7x*(x+4) = 0

7x+28+7x-10x-40 / 7x*(x+4) = 0

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7 0

3 years ago