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barxatty [35]
3 years ago
8

HELLO!! I NEED HELP! Please show full Solutions. I will mark brainliest for the best answer. Thank you and god bless.

Mathematics
1 answer:
Greeley [361]3 years ago
8 0
((x+2)(x+2))-((x-5)(1))=A

x^2+4x+4-x+5=A

x^2+3x+9=A
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Please help. 10 points. Please do not guess. Guesses will be reported.
Alex73 [517]

The inscribed angle theorem says that

m\angle CAB=\dfrac12m\angle COB

Triangle AOC is isosceles because both AO and CO are radii of the circle and have the same length. This means angles CAO and ACO have the same measure and are congruent.

Angles ACO and COD are congruent because they form an alternating interior pair between the parallel lines AC and OD.

Taking all these facts together, we have

m\angle COB=2m\angle COD

and since angle COB is made up of angles COD and DOB, these angles must be congruent, and so the arcs they subtend (CD and DB, respectively) must also congruent.

3 0
3 years ago
To study the effectiveness of a certain adult reading program, researchers will select a random sample of adults who are eligibl
navik [9.2K]

Answer:

c) A matched-pairs t-interval for a population mean difference

Step-by-step explanation:

Matched-Pairs t-Test. A matched-pairs t-test is used to test whether there is a significant mean difference between two sets of paired data.

6 0
3 years ago
12% is 90% of what number?
Andrews [41]
12% = 0.12

90% = 0.9

0.12 = 0.9 \times x\\\\x = \frac{0.12}{0.9}=\boxed{1.33333}
7 0
3 years ago
Determine the intercepts of the line.<br> x-intercept: (___,___)<br> y-intercept: (___,___)
valentina_108 [34]

Answer:

x-intercept: (-40,0)

y-intercept: (0,15)

Step-by-step explanation:

5 0
3 years ago
What Numbers Go Into 515 ? 
Pavel [41]
5 will go into 515, 103 times.
3 0
3 years ago
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