All categories

3 years ago

Will mark brainliest to best answer, i need it asap!!!!!!!!!!!!!

Mathematics

2 answers:

Paha777 [63]3 years ago

7 0

Answer:

please mark me as brainlest

Step-by-step explanation:

B is the answers for the question

satela [25.4K]3 years ago

4 0

$▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪$

The Above statement can be represented as :

$\dfrac{a - 15}{10}$

so, the correct choice is A.

You might be interested in

For an independent t-test, if the mean of group 1=10, mean of group 2=12, ss1 =5, ss2=8, there are 6 individuals per group. what

eimsori [14]

The value of t obtained is 4.76

Given,

Mean of group 1, $M_{1}$ = 10

Mean of group 2, $M_{2}$ = 12

$SS_{1}$ = 5

$SS_{2}$ = 8

Number of individuals per group, n = 6

The degrees of freedom are calculated as:

$df = (n_{1} -1)+(n_{2} -1)$ = ( 8-1) + (8-1) = 7 + 7 = 14

The difference between sample means $M_{d}$ is:

$M_{d}$ = $M_{1} -M_{2}$ = 10 - 12 = 2

Here n is equal for both groups which is = 8

Now,

The standard deviation of sample 1 :

$s_{1} =\sqrt{\frac{SS_{1} }{n_{1} -1} } = \sqrt{\frac{5}{8-1} } = \sqrt{\frac{5}{7} } = 0.85$

The standard deviation of sample 2 :

$s_{2}= \sqrt{\frac{SS_{2} }{n_{2}-1 } } = \sqrt{\frac{8}{8-1} } = \sqrt{\frac{8}{7} } = 1.07$

Now, we have to calculate the standard error for the difference of the means.

MSE = $\frac{(n_{1}-1)s^{2} _{1}+(n_{2}-1)s^{2} _{2} }{(n_{1}-1)+(n_{2}-1) }$

= $\frac{(8-1)(0.85^{2})+(8-1)(1.07^{2}) }{(8-1)+(8-1)}$

= $\frac{10.1318}{14}$

MSE = 0.7237

Then, the standard error can be calculated as:

$s_{M_{d} } = \sqrt{\frac{2MSE}{n} } = \sqrt{\frac{2 * 0.7237}{8} } = 0.42$

Now we can calculate t :

$t=\frac{M_{d} }{s_{M_{d} } } = \frac{2}{0.42} = 4.76$

Learn more about standard deviation here : brainly.com/question/16403666

#SPJ4

7 0

2 years ago

Pls help me with this question!!!

ankoles [38]

Answer: $2/child and $4/adult

Step-by-step explanation:

The total fare is $14 for 2 adults and 3 children

x is the child's fare

y is the adults fare

We can say:

1) 3x + 2y = $14

2) We are told that x = (1/2)y [each child's fare is 1/2 each adult's fare]

3) use (2) in (1)

3x + 2y = $14

3(1/2)y + 2y = $14

(3/2)y + 2y = $14

(7/2)y = $14

y = ($14)*(2/7)

y = $4/adult

x = (1/2)y; x = (1/2)(4)

x = $2/child

Check: Does 3x + 2y = $14 when x = $2/child and y = $4/adult?

3x + 2y = $14

3($2/child) + 2($4/adult) = $14

$6 + $8 = $14 YES

6 0

3 years ago

(a) What is the probability that it won't rain tomorrow?

dem82 [27]

Answer:

10%

Step-by-step explanation:

10/100 = 10%

4 0

4 years ago

Read 2 more answers

If x+3/3 = y+2/2, then x/3=

kotegsom [21]

Answer:

C.) y/2

Step-by-step explanation:

We can simplify (x+3)/3 to x/3 + 3/3, then simplify (y+2)/2 to y + 2/2, and since 2/2 and 3/3 are both 1, so we can say that x/3 + 1 = y/2 + 1, meaning that x/3 = y/2.

6 0

3 years ago

Read 2 more answers

Find the equation of the line that passes through the given points. Write the equation in slope-intercept form.

nordsb [41]

Step-by-step explanation:

m=(y1-y)/(x1-x2)

m=(3-(-4))/(-4-(-2))

m=7/-2=-7/2

y=mx+c

y=-7/2x+c

4 0

3 years ago