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vesna_86 [32]
3 years ago
15

Please help me! I will mark you brainliest!

Mathematics
1 answer:
AleksAgata [21]3 years ago
8 0

Answer:

1

Step-by-step explanation:

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ABC is isosceles with AB=AC=8 units and BC=6 units. D and E are midpoints of AB and BC respectively. Calculate the length of DE?
Allushta [10]
The triangle is drawn and is shown in the image attached with.

We get two similar triangles. Triangle ABC and Triangle ADE. Since the triangles are similar the ratio of their corresponding sides will be the same. 

D and E are the midpoints of AB and BC, therefore, AD and AE are both 4 units in length. Using the property of similar triangles, we can say:

AD : DE= AB : BC
AD = 4 units
AB = 8 units
BC = 6 units
DE = unknown = x units

So,

4 :x = 8 : 6 \\  \\ 
 \frac{4}{x} = \frac{8}{6}  \\  \\ 
x=4* \frac{6}{8}=3 


Therefore, the length of DE will be 3 units

6 0
3 years ago
Which of the following values of x will result in a true statement when
vodka [1.7K]

Answer:

Step-by-step explanation:

Here you go mate

Use PEMDAS

Parenthesis

Exponent

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Division

Addition

Subtraction

Step 1

-3(x-2)=9  Equation/Question

Step 2

-3(x-2)=9  Remove parenthesis

3x+6=9

Step 3

3x+6=9  Add -6

-3x=3

Step 4

−3x=3  Divide

answer

x=-1

Hope this helps

5 0
3 years ago
Please help me I’ll appreciate smmm
malfutka [58]

Answer:

I say it is a. (A)

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
Which expression is equivalent to |1-5| + |3|?<br><br><br> O -2<br><br> O -8<br><br> O 2<br><br> O 8
vfiekz [6]

Answer:

8

Step-by-step explanation:

because you do |1-5| first then do add ur answer to |3|

3 0
4 years ago
PLS HELP ASAP THIS IS DUE IN 10 MINUTES I ONLY NEED HELP WITH 14
Ne4ueva [31]

Answer:

X+4

Step-by-step explanation:

Length is 4 more than width.

X+4= length

First box is 8

Second box is 13

Third box is 20

4 0
3 years ago
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