All categories

3 years ago

Help giving brainlest

Mathematics

2 answers:

nikitadnepr [17]3 years ago

5 0

Answer:

15/12 or 5/4

Step-by-step explanation:

change all of fractions into a common denominator

$\frac{10}{12} + \frac{4}{12 } + \frac{1}{12}$

it would equal 15/12

if you need it reduced 5/4

dimulka [17.4K]3 years ago

3 0

Answer:

1 3/12

Hope this helps :)

You might be interested in

If two angles are a linear pair, then they add to equal 180

kondor19780726 [428]

Answer:

True i think

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

HURRY I NEED HELP!!!!!

Daniel [21]

Answer:

<h3>hey mate here is ur answer:---------------------------------------------------</h3>

<h3>1) f (x) = x 3 + 2x 2 - 8x first factor of x ------> x( x^2 +2x -8) = 0 -------> x = 0 and x^2 +2x -8 = 0</h3><h3 /><h3>1) f (x) = x 3 + 2x 2 - 8x first factor of x ------> x( x^2 +2x -8) = 0 -------> x = 0 and x^2 +2x -8 = 0 Now, you find b^2 -4ac that in this case will be = 2^2 -4*1*(-8) = 4 + 32 = 36 it means this equation has 2 different real roots and will be (-b ±√b^2 - 4ac) / 2a ------> x = 2 , -4 as result #1 has 3 real roots such as 0,2,-4</h3>

<h3>I hope this helps u </h3><h3>have a nice day ✌</h3>

3 0

3 years ago

PLEASE HELP worth 45 points

sdas [7]

1 blue square on drawing is length 1/4 in but that means 4ft in reality.

so one blue square area correspongs to 4x4 = 16 square feet.

(a) there 6 tiles for the batrhroom = 6x16 sq.ft = 96 sq.ft and the cost will be $480

(b) bedroom + living area = 7x8-8 tiles = 48 tiles = 48 x 16 sq.ft. = 768 sq.ft = 85.33 sq. yards. So the cost will be 85.33*18=$1535.94

unit cost for carpet: $1535.94/768sq.ft = $2/sq.ft

The tile has a greater unit cost ($5 per sq.ft) than carpet ($2 per sq.ft)

5 0

3 years ago

It has been found that 26% of men 20 years and older suffer from hypertension (high blood pressure) and 31.5% of women are hyper

vfiekz [6]

Complete Question

It has been found that 26% of men 20 years and older suffer from hypertension (high blood pressure) and 31.5% of women are hypertensive. A random sample 150 of each gender was selected from recent hospital records, and the following results were obtained.

Men. 43 patients had high blood pressure

Woman. 52 patients had high blood pressure.

Answer:

The 95% confidence interval is

$- 0.1651 < p_m - p_f$

This mean that there is a 95 % confidence that the difference between the true proportions of male and female that are hypertensive is within this interval and given that the interval contains zero then there is no statistically significant difference between the genders that are hypertensive

Step-by-step explanation:

From the question we are told that

The sample size for male is $n_1 = 150$

The number of male that are hypertensive is $m = 42$

The sample size of female is $n_2 = 150$

The number of female that are hypertensive is $q = 52$

The proportion of male that are hypertensive is mathematically represented as

$\r p_m = \frac{43}{150}$

$\r p_m = 0.287$

The proportion of female that are hypertensive is mathematically represented as

$p_f = \frac{52}{150}$

$p_f = 0.347$

From the question we are told that confidence level is 95%, hence the level of significance is mathematically represented as

$\alpha = 100 -95$

$\alpha =5\%$

$\alpha =0.05$

Next we obtain the critical value of $\frac{ \alpha }{2}$ from the normal distribution table, the value is

$Z_{\frac{ \alpha }{2} } = 1.96$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \sqrt{\frac{ \r p_m (1- \r p_m )}{n_1} + \frac{ \r p_f (1- \r p_f )}{n_2} }$

substituting value

$E = 1.96 * \sqrt{\frac{ 0.287 (1- 0.287 )}{150} + \frac{ 0.347 (1- 0.347 )}{150} }$

$E = 0.1051$

The 95% confidence interval is mathematically represented as

$(\r p_m - \r p_f ) - E < p_m - p_f < (\r p_m - \r p_f ) + E$

substituting values

$( 0.287 - 0.347 ) - 0.1051 < p_m - p_f$

$- 0.1651 < p_m - p_f$

This mean that there is a 95 % confidence that the difference between the true proportion is within this interval and given that the interval contains zero then there is no statistically significant difference between the genders that are hypertensive.

4 0

3 years ago

HJ= 5x -3, JK= 8x -9 and KH= 131

Fynjy0 [20]

Answer:

HJ = 52

JK = 79

Step-by-step explanation:

Hello, I want to assume you are trying to determine either HJ or JK. Below is an illustration of how to determine either HJ or JK.

From the question given above, the following data were obtained:

HJ = 5x – 3

JK = 8x – 9

KH = 131

If we draw a straight line, we'll observe the following:

H_______J_______K

KH = HJ + JK

Next, we shall determine the value of x.

HJ = 5x – 3

JK = 8x – 9

KH = 131

KH = HJ + JK

131 = (5x – 3) + (8x – 9)

131 = 5x – 3 + 8x – 9

Collect like terms

131 + 3 + 9 = 5x + 8x

143 = 13x

Divide both side by 13

x = 143 / 13

x = 11

Finally, we shall determine HJ and JK. This can be obtained as follow:

For HJ:

HJ = 5x – 3

x = 11

HJ = 5(11) – 3

HJ = 55 – 3

HJ = 52

For JK:

JK = 8x – 9

x = 11

JK = 8x – 9

JK = 8(11) – 9

JK = 88 – 9

JK = 79

6 0

4 years ago