Pls help I’ve been stuck for days

What is 3(x-6)+(4x+12)-6x simplify.

Bezzdna [24]

Answer:

x-30

Step-by-step explanation:

Firstly, you do the first step, which is, 3x-18+4x+12-6x, then you continue simplifying it: 7x-18+12-6x.

Keep it on and on, the next step: x-18+12, add 18 and 12 together you get 30.

So the final answer is x-30

6 0

3 years ago

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Of the 146 students that go to school, 68 get the bus, 37 walk, 12 cycle and the remainder get a lift. What is the probability t

dem82 [27]

Answer:

Step-by-step explanation:

i think the probability is 34

7 0

3 years ago

Read 2 more answers

In the 1980’s, a clinical trial was conducted to determine if taking an aspirin daily reduced the incidence of heart attacks. Of

zubka84 [21]

There is enough evidence to conclude that taking aspirin cannot reduces the chance of cancer.

Given sample size of patients take aspirin 11037, sample size of patients who have assigned placebo group be 11034. 104 doctors who take aspirin had a heart attack, 189 doctors had placebo had heart attacks.

First we have to form hypothesis.

$H_{0} :p{1} -p_{2} =0$

$H_{1}:p_{1} -p_{2} < 0$

We have to find the respective probabilities.

$p_{1}$ =104/11037

=0.0094

$p_{2}$ =189/11034

=0.0171

Now their respective margin of errors.

$s_{1}$ = $\sqrt{ {(0.0094*0.9906)/11037}$

=0.0009

$s_{2}$ = $\sqrt{0.0171*0.9829}$

=0.0011

Hence the distribution of the differences,they are given by:

p= $p_{1} -p_{2}$

=0.0094-0.0171

=-0.0077

S= $\sqrt{s_{1} ^{2}+s_{2} ^{2} }$

= $\sqrt{(0.0009)^{2} +(0.0011)^{2} }$

=0.00305

z=(p -f)/S (In which f=0 is the value tested at the null hypothesis)

=(-0.0077-0)/0.00305

=-2.52

p value will be 0.005.

p value of 0.05 significance level.

z=1.96.

1.96>0.005

So we will reject the null hypothesis which means it cannot reduce the whole chance of becomming a heart attack.

Hence there is enough evidence to conclude that taking aspirin cannot reduces the chance of cancer.

Learn more about t test at brainly.com/question/6589776

#SPJ4

6 0

2 years ago

MARKIN BRAINIEST ANSWER!!!!<br>(btw slide 3 is the answers you might need to solve this)

TiliK225 [7]

Answer:

Step-by-step explanation:

I assume you need help with the first picture:

Let $x=\frac{a}{b} \\y=\frac{c}{d}$

Then

$x+y=\frac{a}{b} +\frac{c}{d} =\frac{ad}{bd} +\frac{bc}{bd} =\frac{ad+bc}{bd} , b,d\neq 0$

Clearly you can see that the sum of 2 rational numbers gives a rational number.

7 0

3 years ago

What are the x and y intercepts of f(x) = x2-x-12/x2+5x+6 and is there a hole?

stiv31 [10]

Answer:

There are no holes. The VAs are x=4 & x=-4 the HA is x=2 the x intercepts are (-3,0) & (3,0) and the y intercept is (0,9/8).

Step-by-step explanation:

Given f ( x ) =2 x ^2 − 18/x^2-16

find all asymptotes, holes and intercepts.

Factor the numerator and denominator.

f ( x ) =2 ( x ^2 − 9 )/( x + 4 ) ( x − 4 )

f ( x ) =2 ( x +3 ) ( x − 3 )/( x + 4 ) ( x − 4 )

A hole exists when the numerator and denominator contain the same factor (a factor "cancels out"). This function has no holes.

To find the vertical asymptote(s) (VA), find the values of x

which make the denominator equal zero. The function is undefined at these values of x

because you cannot divide by zero.

Set each factor of the denominator equal to zero and solve.

x + 4 = 0 and x − 4 = 0

x = − 4 and x = 4

These are the VAs.

To find the horizontal asymptote(HA), compare the degree of the numerator and denominator. If the degrees are the same, the HA is the ratio of the leading coefficients.

For f ( x) =2 x ^2 − 18/x^2-16

the degree in both numerator and denominator is 2

and the ratio of the leading coefficients is 2/1=1

The HA is x = 2

The x intercept is the value at which the function (or "y") equals zero. If the numerator is zero, the function equals zero.

2 ( x + 3 ) ( x − 3 ) = 0

x + 3 = 0 x − 3 = 0

x = − 3 and x = − 3

The x intercepts are ( − 3 , 0 ) and ( 3 , 0 ) .

The y intercepts are found by setting x = 0 .

f ( 0 ) = 2 ( 0 ) ^2 − 18/( 0 )^2 − 16 = 9 /8

The y intercept is ( 0 , 9/ 8 ) .

graph{(2x^2-18)/(x^2-16) [-10.04, 9.96, -3.56, 6.44]}

HOPE THIS HELPS YOU!!!!

=)

4 0

4 years ago