3 years ago

I need help can someone help?

Mathematics

1 answer:

GREYUIT [131]3 years ago

7 0

Answer:

Step-by-step explanation:

You might be interested in

Solve x2 – 7x = –13.

aleksklad [387]

we have

$x^{2} -7x=-13$

Complete the square. Remember to balance the equation by adding the same constants to each side

$x^{2} -7x+3.5^{2}=-13+3.5^{2}$

$x^{2} -7x+12.25=-13+12.25$

$x^{2} -7x+12.25=-0.75$

Rewrite as perfect squares

$(x-3.5)^{2}=-0.75$

remember that

$i=\sqrt{-1}$

Square root both sides

$(x-3.5)=(+/-)\sqrt{-0.75}$

$(x-3.5)=(+/-)\sqrt{-1*0.75}$

$(x-3.5)=(+/-)\sqrt{0.75}i$

$x1=3.5+\sqrt{0.75}i$

$x2=3.5-\sqrt{0.75}i$

Simplify

$\sqrt{0.75}=\frac{\sqrt{3}}{2}$

$x1=3.5+\frac{\sqrt{3}}{2}i$

$x2=3.5-\frac{\sqrt{3}}{2}i$

therefore

<u>the answer is</u>

$x1=3.5+\frac{\sqrt{3}}{2}i$

$x2=3.5-\frac{\sqrt{3}}{2}i$

6 0

3 years ago

Read 2 more answers

Can anyone help me with this??????

Lapatulllka [165]

I think it’s the second one

5 0

4 years ago

Read 2 more answers

Find the common ratio for the following geometric sequence 7,3.5,1.75,0.875

Serhud [2]

Answer:2

Step-by-step explanation:

7/2= 3.5

3.5/2= 1.75

1.75/2= 0.875

4 0

3 years ago

Read 2 more answers

A particle moves along line segments from the origin to the points (3, 0, 0), (3, 4, 1), (0, 4, 1), and back to the origin under

LiRa [457]

Answer:

the first option because I took the test

8 0

3 years ago

What is work shown for 3 + 2/5x = -1

polet [3.4K]

Answer:

x = -1/10

Step-by-step explanation:

3 + 2/5x = -1

multiply through by 5x to make the equation linear

3 × 5x + 2/5x × 5x/1 = -1 × 5x

15x + 2 = -5x

collect like terms

15x + 5x = -2

20x/20 = -2/20

x = - 1/10

5 0

3 years ago