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Lilit [14]
3 years ago
6

Which letter has rotational symmetry?

Mathematics
1 answer:
posledela3 years ago
8 0
The letter o? I'm not exactly sure but I think that's right :)
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Daniel wanted to know his approximate score on the final exam for his mathematics class. His professor hinted that his score was
frozen [14]

Answer: 101.69

Step-by-step explanation:

Formula we use to find the z-score :-

z=\dfrac{x-\mu}{\sigma}    (1)

Given : \mu=90

\sigma=7

Daniel's z score : z= 1.67

Let x be the raw score for Daniel's exam grade, then substitute the values of \mu,\ \sigma\ and \ x in (1), we get

1.67=\dfrac{x-90}{7}\\\\\Rightarrow\ x-90=7\times1.67\\\\\Rightarrow\ x=11.69+90=101.69

Hence, the raw score for Daniel's exam grade = 101.69

3 0
3 years ago
Please help fill in the blanks
Wewaii [24]

Answers:

Reason 4: Isosceles triangle

Reason 5: Segment Addition Postulate

Reason 6: Segment Addition Postulate

Reason 7: Substitution

Reason 8: Substitution

Reason 9: Subtraction property of equality

Reason 10: Definition of congruence

Reason 11: Vertical Angles Theorem

Reason 12: Vertical Angles Theorem

Reason 13: ASA (angle side angle) congruence theorem

==================================

Explanations:

Reason 4: Triangle DCE is an isosceles triangle because of statement 1 of the proof table. The congruent base angles lead to congruent opposite sides.

Reason 5 and 6: This is the idea of breaking any segment into smaller pieces. The smaller pieces glue back together to get the larger original segment.

Reasons 7 and 8: Substitution is a math term which means "replacement". So for instance, in line 7 we started with DB = DC + CB (from line 6), then we replaced the "DB" with "DF" (see line 3); and then replaced "DF" with "DE+EF"

Reason 9: In this step, we subtract DE from both sides to have it go away and cancel out

Reason 10: If two lengths are equal, then the segments are congruent

Reason 11 & 12: Two angles are vertical if they are opposite from one another after forming from two lines crossing. Think of an X shape. Vertical angles are congruent.

Reason 13: We have two pairs of congruent angles, and a pair of congruent sides. The sides are between the angles. The order is important. See the attached image below.

3 0
3 years ago
Please answer !!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!
zvonat [6]

i would probably  use an iv or a blood simple

3 0
3 years ago
If two forces of 5 lb. and 8 lb. acting at the same point are equivalent to a single force of 10 lb. Find the angle between the
Alchen [17]
The force of 10 pounds is made up of the horizontal components  of the  8 and 5 pound forces

8 cos 30 + 5 cos 52 =  10 

so your answer is 30 degrees
7 0
3 years ago
2. Points A, B, C, D, E, and F are integers. Use the clues to put the points in order
vlabodo [156]
Answer: F C B A E D
6 0
3 years ago
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