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3 years ago

I need help pleaseee

Mathematics

2 answers:

Harrizon [31]3 years ago

8 0

C cause c is always correct

lidiya [134]3 years ago

6 0

Answer:

I would say it is c

Step-by-step explanation:

Because x is on the negative so that would have to be -x then and the y number is posiitiv so it is y = -x + 4

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Which of the following expressions is a factor of the polynomial x 2 +3/2x-1

Elodia [21]

Answer:

$\large \boxed{\sf \ \ \ (x+2)(x-\dfrac{1}{2}) \ \ \ }$

Step-by-step explanation:

Hello,

let's solve

$x^2+\dfrac{3}{2}x-1=0\\\\ 2x^2+3x-2=0 \ \text{multiply by 2}\\\\\\$

$\Delta=b^2-4ac=9+4*2*2=9+16=25$

There are two solutions

$x_1=\dfrac{-3-\sqrt{25}}{4}\\\\x_1=\dfrac{-3-5}{4}\\\\x_1=\dfrac{-8}{4}\\\\\boxed{x_1=-2}$

And

$x_2=\dfrac{-3+\sqrt{25}}{4}\\\\x_2=\dfrac{-3+5}{4}\\\\x_2=\dfrac{2}{4}\\\\\boxed{x_2=\dfrac{1}{2}}$

So we can write

$x^2+\dfrac{3}{2}x-1\\\\=(x-x_1)(x-x_2)\\\\=(x+2)(x-\dfrac{1}{2})$

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

5 0

3 years ago

A=2x3^4x5 B=2^3x3^2x5^2 what’s the highest common factor

qaws [65]

Answer:

8x^34 and 2x^86

Step-by-step explanation:

so u tell me

7 0

3 years ago

Solve: 4x - 3 = 2x + 7<br> Solve: 2x + 6 = 7x - 14

sweet-ann [11.9K]

$\\ \sf\longmapsto 4x-3=2x+7$

$\\ \sf\longmapsto 4x-2x=7+3$

$\\ \sf\longmapsto 2x=10$

$\\ \sf\longmapsto x=5$

$\\ \sf\longmapsto 2x+6=7x-14$

$\\ \sf\longmapsto 7x-2x=6+14$

$\\ \sf\longmapsto 5x=20$

$\\ \sf\longmapsto x=4$

4 0

3 years ago

Read 2 more answers

Help please! I need help with question 3. I don’t know how to start it. I’ll give brainly☺️

ikadub [295]

First you divide $75 and 0.04. And that will get you the answer.
I already did this question last year.

6 0

3 years ago

Read 2 more answers

Problem PageQuestion It takes an older pump twice as long to drain a certain pool as it does a newer pump. Working together, it

umka2103 [35]

Answer:

It will take 6 hours for the new pump to drain the pool.

Step-by-step explanation:

As the complete question is not given, the complete question is found online and is attached herewith

Let the rate of new pump is given as x=W/t_1

Let the rate of the old pump is given as y=W/t_2

it is given that the time t_2=2t_1

So by substituting the values of t_2 in the rate equation of y

y=W/2t_1

y=(W/t_1*2)=x/2

Also the total rate of both the pumps is given as W/t3 where t3 is given as 4 hours so the equation becomes

x+y=W/4

x+x/2=W/4

3x/2=W/4

As x=W/t_1

3W/2t_1=W/4

Now as W is same on both sides so

3/2t_1=1/4

12=2t_1

t_1=6 hours

So it will take 6 hours for the new pump to drain the pool.

7 0

4 years ago