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8_murik_8 [283]
3 years ago
10

PLEASE HELP WILL GIVE BRAINLIEST

Mathematics
2 answers:
Olin [163]3 years ago
8 0

Answer:

Step-by-step explanation:

in tri ADC and tri BDC

∠ADC =∠BDC = 90

DC is common

AD = BD (given)

triangle ADC ≅ tri BDC by SAS congruency

hence AC = BC by CPCT ( congruent parts of congruent triangles)

hence, BC = 13

Free_Kalibri [48]3 years ago
7 0

Answer:

13

Step-by-step explanation:

in a proof, you could say that since AD is congruent to BD, since that is given to you, and angle ACD is congruent to angle CDB since a perpendicular bisector makes both sides a right angle, and CD is congruent to CD, (I forgot the reasoning for this part). after this, you can assume that triangle ACD is congruent to triangle CDB. and that would mean AC is congruent to CB because of CPCTC (Corresponding Parts of Congruent Triangles are Congruent), which would then mean that since AC is 13, CB would be 13 as well.

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-11=(x-3)÷2 what is the solution for x
e-lub [12.9K]

Answer:

          -19

Step-by-step explanation:

                     ~ Distribute:

               - 11 = 1 / 2 x + -3 / 2

                        ~ Flip the equation:

                  1 / 2 x + -3 / 2 = -11

                          ~ Use transposition method:

                     (take -3 / 2 to the other side)

                       1 / 2 x = -11 - (-3 / 2)

                                  = -19 / 2

                                x = -12 / 2 * 2

                                    = -19

Hope this helped

Wishing u a gr8 day

:D

3 0
2 years ago
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11Alexandr11 [23.1K]

Answer:

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Step-by-step explanation:

3 0
2 years ago
(i will give brainliest for the first answer)
labwork [276]

Answer:  X"  ( -3,2)    Y" (-1,0)   Z" (1,6)

Step-by-step explanation:

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PLEASE HELP! I'm struggling on questions like this one. If you can please help on other questions but that's up to you! I will g
Jobisdone [24]

Answer: y=x-4

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
In a manufacturing process, a random sample of 36 bolts has a mean length of 3 inches with a standard deviation of .3 inches. Wh
Liula [17]

The 99 percent confidence interval for the true mean length of the bolt is CI = (2.8712, 3.1288)

<h3>How to find the confidence interval?</h3>

Confidence Interval is used to tell us the degree of certainty or uncertainty that is existent in a sampling method.

The general formula for confidence interval is;

CI = x' ± z(s/√n)

where;

x' is sample mean

z is z-score at confidence level

s is sample standard deviation

n is sample size

We are given;

sample size; n = 36

Sample mean; x' = 3 inches

standard deviation; s = 0.3 inches

confidence level = 99%

z at 99% CL = 2.576

Thus;

CI = 3 ± 2.576(0.3/√36)

CI = 3 ± 0.1288

CI = (2.8712, 3.1288)

Read more about Confidence Interval at; brainly.com/question/17097944

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3 0
1 year ago
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