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Aleksandr [31]
3 years ago
10

HELP PLEASE! I REWARD BRAINLIEST! also no silly answers PLZ

Mathematics
1 answer:
dolphi86 [110]3 years ago
3 0

Answer:

triangle TUM, SAS or Side Angle Side Congruence Postulate

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HELP ME THIS IS EXTRA CREDIT!!!!!!! 
Svetach [21]
2800 + 1.18x = y
x = monthly sales
y = monthly income
y needs to be at least 6400 so that means;

2800 + 1.18x ≥  6400
1.18x ≥ 6400 - 2800
x ≥ (6400 -2800) / 1.18
x ≥ 3050

So she needs to earn at least 3050, which means <span>≥ 3050</span>

3 0
3 years ago
Researchers conducted a study to find out if there is a difference in the use of ereaders by different age groups. randomly sele
ikadub [295]

No, there is significant difference in the use of e readers by different age groups.

Given sample 1 ( 29 years old) n_{1}=628, p_{1}=7%, sample 2( 30 years old)n_{2}=2309, p_{2}=0.11.

We have to first form hypothesis one null hypothesis and other alternate hypothesis.

H_{0}:π1-π2=0

H_{1}:π1-π2≠0

α=0.05

Difference between proportions p_{1}-p_{2}  =-0.04

p_{d}=0.07-0.11=-0.04

The pooled proportion needed to calculate standard error is:

p=(X_{1} -X_{2} )/(n_{1} +n_{2} )

=(44+254)/(628+2309)

=0.10146

The estimated standard error of difference between means is computed using the formula:

S_{p_{1} -p_{2} }=\sqrt{p(1-p)/m_{1}+p(1-p)/n_{2}  }

=\sqrt{0.101*0.899/628+0.101*0.899/2309}

=\sqrt{0.000143+0.00003}

=\sqrt{0.000173}

=0.01315

Z= Pd-(π1-π2)/S_{p_{1} -p_{2} }

=-0.04-0/0.013

=-3.0769

This test is a two tailed test so the p value for this test is calculated as (using z table)

p value:2 P(Z<-3.0769)

=2*0.002092

=0.004189

P value< significance level of 5%.

Hence there is enough evidence to show the claim that there is a significant difference in the use of e readers by different age groups.

Learn more about hypothesis at brainly.com/question/11555274

#SPJ4

Question is incomplete as it also includes:

Significance level of 5%.

4 0
2 years ago
Evaluate: 3(2f - g) + 4h for f = 2, g = -1 and h = 3
UkoKoshka [18]

Answer:

27

Step-by-step explanation:

6f - 3g + 4h

6(2) - 3(-1) + 4(3)

12 + 3 + 12

27

3 0
3 years ago
Read 2 more answers
Find the volume of a right circular cone that has a height of 11.4 in and a base with a radius of 5.1 in. Round your answer to t
grin007 [14]
Ok so I uploaded the picture of how to do the promblem step by step so you know :)

4 0
3 years ago
Read 2 more answers
The difference when 7 less than a number is subtracted from twice the number is 12. What is the number?
hram777 [196]
Answer-

The number is 5

Explanation-

let the number be x
according to the condition
2x-(x-7)= 12
2x-x+7=12
x+7=12

x+7-7=12-7
x=5
therefore the required number is 5
3 0
3 years ago
Read 2 more answers
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