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3 years ago

Solve euation by using the quadratic formula

1 answer:

3 0

A=1 b=2
$a = 1 \\ b = 2 \\ c = - 35$
$\frac{ - b \pm \sqrt{{b}^{2} - 4ac} }{2a}$
$\frac{ - 2 \pm \sqrt{4 - 4(1)( - 35)} }{2}$
$\frac{ - 2 \pm \sqrt{144} }{2} = \frac{ - 2 \pm12}{2} = 5 \: or \: - 7$
if you like my answer please rate as brainliest thanks!

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Question 1

goldenfox [79]

Let t rep tail and h rep head

First tose= h or t

Second tose= h or t

Third tose= h or t

Counting the head and tail together

Then t= 3 and h=3

According to The formulae

3/6= 1/2

4 0

3 years ago

PLEASE HELP!!!!<br><br>-0.5 1/2 0.7 -4/4 from least to greatest

yawa3891 [41]

Step-by-step explanation:

Converting all the numbers to decimals,

1) -0.5

2) 1/2 = 0.5

3) 0.7

4) -4/4 = -1

We see that order of numbers from least to greatest is -1 < -0.5 < 0.5 < 0.7

Please mark Brainliest if this helps!

3 0

3 years ago

2 t-shirts and 3 hats costs £12.

Mariana [72]

Answer:

Cost of tshirt = £7.29

Cost of what = £0.86

Step-by-step explanation:

2t +3h = 12; 10t + 15h = 60

5t + 4h =33; 10t + 8h = 66

15h -8h = -6

7h = -6; h = -6/7; h = 0.86

2t +3(-6/7) =12

14t -18 = 84

14t = 102; t = 102/ 14; t=7.29

6 0

3 years ago

Who is correct? Thanks for the help

Aleksandr-060686 [28]

I believe Hector is correct

Explanation: for every 1 hour the income is $10, therefore working 32 hours will give you $320 as Hector stated, while working 18 hours will not give you $160 as Hannah stated, it will give you $180

4 0

3 years ago

If f(x)=3 x -1 and g(x)=0.03x^3-x+1 an approximate solution for the equation f(x)=g(x) is

lubasha [3.4K]

Answer:

x ≈ {-11.789, +0.501, 11.288}

Step-by-step explanation:

The cubic g(x) - f(x) = 0 has three real solutions. It can be rewritten as ...

$g(x)-f(x)=0\\\\0.03x^3-x+1-(3x-1)=0\\\\0.03x^3-4x+2=0$

Since the solutions are irrational, they are best found using a spreadsheet or graphing calculator. My favorite graphing calculator shows the approximate solutions below.

_____

<em>Comment on the problem statement</em>

Your expression for f(x) is ambiguous in that many Brainly questions have the exponentiation indicator replaced by a blank: 3 x -1 often means 3^x -1 and sometimes means 3^(x-1). We have taken the expression at face value and have assumed it is a linear expression. If otherwise, the problem is basically worked the same way: write a function h(x) = g(x) - f(x) and look for solutions to h(x) = 0. Graphing can be useful.

3 0

3 years ago