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german
3 years ago
8

PLEASEEEE HELP ASAPPP ILL MARK BRAINLIEST IMPORTANT TO SHOW YOUR WORK

Mathematics
1 answer:
geniusboy [140]3 years ago
4 0

Answer:

AC = 7.5 cm

Step-by-step explanation:

Given that the triangles are similar then the ratios of corresponding sides are equal, that is

\frac{AC}{DE} = \frac{BC}{DE} , substitute values

\frac{AC}{3.5} = \frac{7+8}{7} , that is

\frac{AC}{3.5} = \frac{15}{7} ( cross- multiply )

7AC = 52.5 ( divide both sides by 7 )

AC = 7.5 cm

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Plz I need help Plz I need help Plz I need help Plz I need help Plz I need help!!!!!!!!!!!!!!!!!!!!!!
Dafna11 [192]

Answer:

LEAST DIFFICULT: B

MOST DIFFICULT: I

Step-by-step explanation:

LEAST DIFFICULT:

The easiest systems of equations to solve are ones in which x or y is equal to just a number , because in this case, you can just sub in that number in the other equations. Though not the only one, B is an example of this.

MOST DIFFICULT:

More difficult systems of equations to solve are the ones with different amounts of x and y as it requires more computation. Set I is an example of this

8 0
3 years ago
The marital status distribution of the U.S. male population, ages 15 and older, is as follows: 35.4% never married, 53.6% marrie
Evgen [1.6K]

The hypothesis illustrates that the males in the group don't follow a same distribution as all the males that are in the United States.

<h3>How to illustrate the information?</h3>

Based on the information given, it should be noted that the degree of freedom given in this case will be:

= 4 - 1

= 3

By using the Excel function, the p-value is given as 0.0002. In this case, we've to reject the null hypothesis if the p value is less than 0.1.

Therefore, we will reject the null hypothesis in this case. In inferential statistics, the null hypothesis is that two possibilities are the same. It is observed difference is due to chance alone. Using statistical tests, it is possible to calculate the likelihood that the null hypothesis is true

Therefore, the hypothesis illustrates that the males in the group don't follow the same distribution as all the males that are in the United States.

Learn more about hypothesis on:

brainly.com/question/606806

#SPJ1

3 0
2 years ago
17 1/3 + (-50 1/3) -5 1/2
vovangra [49]
<span>17 1/3 + (-50 1/3) -5 1/2 
= -33  - 5 1/2 
= (</span>-33 ) + ( - 5 1/2)
<span>= -38 1/2

</span>
8 0
3 years ago
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7 (r + 1) = 30.3 what is r
GuDViN [60]

Answer:

3.32857142857 i think

4 0
3 years ago
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A bag contains 4 red marbles and 2 white
Rudik [331]

Answer:7

Step-by-step explanation:

5 0
3 years ago
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