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4 years ago

-3 - 10x = 25 + 4xI need help on this

Mathematics

2 answers:

oksian1 [2.3K]4 years ago

4 0

X is -2 you have to get all the x values on one side and then solve

Elenna [48]4 years ago

3 0

X=-2

How I got this: subtract 4x from both sides you get -3-14x=25 then add 3 on both sides you get -14x=28 divide by -14 on both sides you get x=-2

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WILL GIVE BRAINLIEST IF ANSWERED PROPERLY :

tatuchka [14]

Answer:

£121

Step-by-step explanation:

5/12 of the total coins = 5/12 x 96 = 40 ⇒ 40 coins are £2 coins

26 of the coins are £1 coins

Number of 50p coins = 96 - 40 - 26 = 30 ⇒ 30 of the coins are 50p coins

Total money collected = 40 x £2 + 26 x £1 + 30 x £0.50 = £121

(rememberinf to convert 50p into £s)

6 0

3 years ago

What is the solution set of 2x(x - 1) = 3?

garik1379 [7]

First you must distribute the 2x to the numbers inside the parentheses

(2x * x) + (2x * -1) = 3

$2x^{2}$ - 2x = 3

To make this a quadratic equation you can solve bring the 3 over to the left side of the equation by subtracting it to both sides

$2x^{2}$ - 2x - 3 = 0

Use the quadratic equation to solve this (image of the quadratic equation is below)

Remember that quadratic functions are set up like so:

$ax^{2} +bx +c = 0$

That means that in this equation...

a = 2

b = -2

c = -3

^^^Plug these numbers into the quadratic equation and solve...

$\frac{2+/-\sqrt{(-2)^{2}-4(2)(-3)}}{2(2)}$

$\frac{2 +/-\sqrt{4+24}}{4}$

$\frac{2+/-\sqrt{28} }{4}$

$\frac{2+/-2\sqrt{7} }{4}$

$\frac{1+/-\sqrt{7} }{2}$

Keep in mind that +/- is ±

$\frac{1+\sqrt{7} }{2}$

$\frac{1-\sqrt{7} }{2}$

^^^Exact answers

Approximations:

1.823

-0.823

Hope this helped!

~Just a girl in love with Shawn Mendes

8 0

3 years ago

The shape of a quadratic equation is called a...?

fomenos

Answer:

If you mean graphing its called a parabola

Step-by-step explanation:

8 0

3 years ago

Solve by substituting the equation y=-x-6 y=x-4<br>(plz show work)

Elena-2011 [213]

Answer:

x = -1, y= -5

Step-by-step explanation:

y=-x-6

y=x-4

Since both equations are equal to y we can set them equal to each other

-x-6 = x-4

Add x to each side

-x-6+x = x-4+x

-6 = 2x-4

Add 4 to each side

-6+4 = 2x-4+4

-2 =2x

Divide by 2

-2/2 = 2x/2

-1 = x

now find y

y = x-4

y = -1-4

y = -5

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3 years ago

FREE BRAINLEST Reagan has a rectangular bedspread that measures 238 centimeters by 435 centimeters. She wants to sew a fringe ar

Nadusha1986 [10]

Answer:

The answer is 1400

Step-by-step explanation:

3 0

3 years ago

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