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2 years ago

2y-8+4y what is equal to this please help thanks

Mathematics

1 answer:

Nitella [24]2 years ago

8 0

Answer:

$6y - 8$

$2(3y - 4)$

Step-by-step explanation:

The given expresion is 2y-8+4y.

We want to find an expression that is equal to 2y-8+4y.

We need to group like terms to obtain:

$2y + 4y - 8$

We can now combine the like terms to get:

$2y + 4y - 8$

$6y - 8$

We can factor 2 to obtain:

$2(3y - 4)$

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Answer: A: 6

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2 years ago

The value of a house has increased by 5% the house is now valued at £609000 what is the value of the house before the increase?

lutik1710 [3]

Answer:

$Current \ price = 609000\\\\Let \ the \ original \ price \ be = x\\\\\% increase = 5 \% \ of \ x = \frac{5}{100} \times x = \frac{5x}{100}\\\\Price \ after \ increase, current\ price = \frac{5x}{100} + x\\\\$

$=> 609000 = \frac{5x}{100} + x\\\\=>609000 = \frac{105x}{100}\\\\=> x = \frac{609000 \times 100}{105}\\\\x = 580000$

Therefore original price = $580,000

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2 years ago

What are the numbers from least to greatest based on the -7 ,4, -2, 3

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Answer:

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2 years ago

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Write a polynomial equation with roots 5 and -9i. X^3-?x^2+?X-?=0

jek_recluse [69]

Answer:

x³ - 5x² + 81x - 405 = 0

Step-by-step explanation:

Complex roots occur in conjugate pairs.

Thus given x = - 9i is a root then x = 9i is also a root

The factors are then (x - 5), (x - 9i) and (x + 9i)

The polynomial is the the product of the roots, that is

f(x) = (x - 5)(x - 9i)(x + 9i) ← expand the complex factors

= (x - 5)(x² - 81i²) → note i² = - 1

= (x - 5)(x² + 81) ← distribute

= x³ + 81x - 5x² - 405, thus

x³ - 5x² + 81x - 405 = 0 ← is the polynomial equation

6 0

3 years ago

Can I get help? the steps too, please. I'd mean a lot to me if someone helped.

Shkiper50 [21]

Remember that the slope intercept formula is:

y = mx + b

m is the slope ( $\frac{rise}{run}$ )

b is the y-intercept

In this case the slope is...

$\frac{-1}{3}$

^^^This has a negative slope because the line is decreasing from left to right

The y-intercept is...

(0, -2)

so...

y = $\frac{-1}{3}$ x - 2

Hope this helped!

~Just a girl in love with Shawn Mendes

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2 years ago

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