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3 years ago

Can someone find the error and explain?

Mathematics

1 answer:

In-s [12.5K]3 years ago

7 0

$\huge\boxed{\text{There is no error.}}$

<em>Note: I have checked my work multiple times. Consider informing your teacher of this.</em>

We have $\frac{10n-5}{5}$ to start.

Factor out $5$ from the top expression. $\frac{5(2n-1)}{5}$

Cancel out the $5$ s. $2n-1$

$2n-1=2n-1$

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Solve.<br> 9x + 6y = -3<br> y = -8

klio [65]

Answer:

Step-by-step explanation:

9x+6y=-3

9x+6(-8)=-3

9x-48=-3

9x=45

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3 years ago

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Expressions equivalent to 5.2(x-3)+8x

amid [387]

5.2x - 15.6 + 8x
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4 years ago

5. Given that a + b = 8 and ab = 15, find the value of (a+b)² and a² + b²

Maksim231197 [3]

Answer:

64 and 34

Step-by-step explanation:

Given

a + b = 8 ( square both sides )

(a + b)² = 8² = 64

------------------------------------------------

(a + b)² = 64 ← expand left side

a² + b² + 2ab = 64 ← substitute ab = 15

a² + b² + 2(15) = 64

a² + b² + 30 = 64 ( subtract 30 from both sides )

a² + b² = 34

5 0

3 years ago

Write an equation of the line in slope- intercept form

gavmur [86]

Answer:

$a)\ y=-\frac{1}{3}x$

Step-by-step explanation:

Slope (m) form: $\frac{y_2-y_1}{x_2-x_1}$

$m=\frac{y_2-y_1}{x_2-x_1} \\\\m=\frac{1-0}{-3-0} \\\\m=\frac{1}{-3} \\\\m=-\frac{1}{3}$

$y=mx+b\\y=-\frac{1}{3}x +b$

(0, 0)

$y=-\frac{1}{3}x +b\\0=-\frac{1}{3}(0) +b\\0=0+b\\0=b$

$y=-\frac{1}{3}x +0\\y=-\frac{1}{3}x$

Check your answer:

$y=-\frac{1}{3}x \\1=-\frac{1}{3}(-3)\\1=-1$

This statement is true

Hope this helps!

6 0

2 years ago

For which value of x does f(x) = 2

laila [671]

Answer:

Step-by-step explanation:

<em>Look a the picture</em>.

Draw the horizontal line <em>y = 2</em>.

Common point: (-4, 2).

Conclusion: f(x) = 2 → x = -4

8 0

3 years ago