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3 years ago

Solve 4x^4+7x^2-2=0 Choose the factored form of the polynomial expression

Mathematics

1 answer:

horrorfan [7]3 years ago

5 0

Step-by-step explanation:

4x⁴ + 7x² − 2 = 0

(4x² − 1) (x² + 2) = 0

(2x − 1) (2x + 1) (x² + 2) = 0

x = ±½, ±i√2

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Write the equation of the line that passes through (3, –2) and has a slope of 4 in point-slope form.

Likurg_2 [28]

A. would be y=4x-14
B. would be y=4x+11
C. would be y=x/4 - 11/4
D. would be y=x/4 + 7/2
Hope this helps! :)

4 0

3 years ago

Bertha buys electricity from a company that offers a choice of two tariffs. Both have a daily charge of $0.20 regardless of how

Alenkasestr [34]

Answer: D ( 17/20)

Step-by-step explanation:

The two choices are:

The ‘standard’ tariff charges = $0.10 per unit

The ‘day/night tariff’ = $0.12 per unit for each unit consumed between 06:00 and 22:00 but only $0.05 for each unit consumed between 22:00 and 06:00

The day time is between 22:00 and 06:00

Time = 22 - 6 = 16 hours

Let assume that the charges are unit per hour.

For standard tariff = (16 × 0.10) + 0.2

Standard tariff = 1.6 + 0.2 = 1.8

For day/night = (16 × 0.12) + 0.2

= 1.92 + 0.2

= 2.12

The proportion will be

1.8/2.12 = 17/20 ( approximately)

6 0

4 years ago

Solve the system of equations.<br> 5y – 4c = -7<br> 2y + 4x = 14

Lesechka [4]

$c=\frac{5y}{4\\} + \frac{7}{4\\}$

$x=-\frac{y}{2} + \frac{7}{2}$

Step-by-step explanation:

if 'c' is meant to be another 'x' the answer is

(3, 1)

x = 3,y = 1

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3 years ago

Select all the expressions that are equivalent to −5/6 / -1/3

Sindrei [870]

Step-by-step explanation:

We need to find an expression for $\dfrac{\dfrac{-5}{6}}{\dfrac{-1}{3}}$ .

We can solve it as follows.

We know that,

$\dfrac{\dfrac{a}{b}}{\dfrac{c}{d}}=\dfrac{a}{b}\times \dfrac{d}{c}$

So,

$\dfrac{\dfrac{-5}{6}}{\dfrac{-1}{3}}=\dfrac{-5}{6}\times -3\\\\=\dfrac{5}{2}$

$=2\dfrac{1}{2}$

Hence, this is the required solution.

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3 years ago

Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used. Match each function with the description

LiRa [457]

Answer:

Step-by-step explanation:

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3 years ago