3 years ago

Solve for r. –7r = –8r − 20 r =

Mathematics

2 answers:

victus00 [196]3 years ago

8 0

Answer:

$\boxed{r = -20}$

Step-by-step explanation:

$= > - 7r = - 8r - 20 \\ \\ = > - 7r + 8r = - 20 \\ \\ = > 8r - 7r = - 20 \\ \\ = > r = - 20$

attashe74 [19]3 years ago

6 0

Answer:

r = -20

Step-by-step explanation:

–7r= –8r−20

<em>Add 8r to both sides</em>

r = -20

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Use the discriminant and select whether the roots of 5x 2 - 4x + 3 = 0 are real or non-real. real

valkas [14]

The discriminant of a quadratic equation is calculated through the equation,
D = b² - 4ac
In the given above, a = 5, b = -4, and c = 3. Substituting these values to the equation,
D = (-4)² - 4(5)(3) = -44
Since the discriminant is negative, the roots are non-real.

3 0

4 years ago

Read 2 more answers

I need to say it in a audio recording so please make it understandable to say in words

Alborosie

Answer:

see explanation

Step-by-step explanation:

Consider perfect squares either side of 60, that is

49 < 60 < 64, thus

$\sqrt{49}$ < $\sqrt{60}$ < $\sqrt{64}$ , that is