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3 years ago

5

-2w-(+9w-7)-2w+9-5w=

1 answer:

Ulleksa [173]3 years ago

4 0

Answer:

-18w+16

Step-by-step explanation:

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What are the roots of the quadratic equation 2x2+7x+4=0? Select all that apply.

skad [1K]

Answer:

option A and B

$x=\frac{-7+\sqrt{17}} {4}$

and

$x=\frac{-7-\sqrt{17}} {4}$

Step-by-step explanation:

we have

$2x^2+7x+4=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

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

in this problem we have

$2x^2+7x+4=0$

so

$a=2\\b=7\\c=4$

substitute in the formula

$x=\frac{-7\pm\sqrt{7^{2}-4(2)(4)}} {2(2)}$

$x=\frac{-7\pm\sqrt{17}} {4}$

so

$x=\frac{-7+\sqrt{17}} {4}$

and

$x=\frac{-7-\sqrt{17}} {4}$

7 0

3 years ago

Help me with pre calc

ad-work [718]

Answer:

For the first one, R would be = -3/5

In the decimal form that would be -0.6

For the second one, K = 2/19

In the decimal form, it would be 0.10526315 …

Step-by-step explanation:

6 0

3 years ago

If B = 1 - 2s^2 – s and C = 3 + 5s², find an expression that equals 3B + C in<br> standard form.

Keith_Richards [23]

Answer: -s² - 3s + 6

Step-by-step explanation:

b = 1 - 2s² - s

c = 3 + 5s²

Substitute

3b + c

3 (1 - 2s² - s) + 3 + 5s²

3 - 6s² - 3s + 3 + 5s²

Put like terms together

-6s² + 5s² - 3s + 3 + 3

-s² - 3s + 6

Hope I helped!

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3 years ago

Molly and jake are playing a game in which they roll two dice and find the product of the number face up if the product is even,

nikklg [1K]

Answer:

fdjj hidji hfhd hshiu kgjjg kfbhdji

6 0

3 years ago

Drag the diagram that correctly models each description to the correct container.

bekas [8.4K]

Answer:

1/3 of 1/4 : Top left and 1/5 of 5/6: Top right

Step-by-step explanation:

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3 years ago