2 years ago

What value of m makes the equation true? 16 + 2 ( 5m -8 ) - m = 36

Mathematics

2 answers:

dsp732 years ago

6 0

Answer:

Step-by-step explanation:

16 + 10m - 16 - m = 36,

9m = 36,

m = 4

lubasha [3.4K]2 years ago

3 0

16+2(5m-8)-m=36

First solve 2(5m-8)

2x5m= 10m 2x(-8)= -16

Now it looks like this

16+10m-16-m=36

Cancel 16 with the -16

10m-m=36

Now here its pretty obvious

9m=36

To find m divide 9 by 36

36:9=4

m=4

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2 years ago

Find the solutions of the quadratic equation -9c² +2 +3 = 0.

Tresset [83]

Given that,

An equation : -9c² +2c +3 = 0

To find,

Find the value of x.

Solution,

We have, -9c² +2c +3 = 0

We can solve it using the formula as follows :

$x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

Here, a = -9, b = 2 and c =3

Put the values,

$c=\dfrac{-2\pm \sqrt{(2)^2-4(-9)(3)}}{2(-9)}\\\\c=\dfrac{-2+\sqrt{(2)^{2}-4(-9)(3)}}{2(-9)}, \dfrac{-2-\sqrt{(2)^{2}-4(-9)(3)}}{2(-9)}\\\\c=-0.47, 0.69$