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Igoryamba
2 years ago
14

Without graphing, identify the equation of the axis of symmetry for

Mathematics
1 answer:
I am Lyosha [343]2 years ago
5 0
C

Explanation:
That’s where the vertex of the slope will be
You might be interested in
What other compatible numbers could you use for 428 and 286
kaheart [24]
How about raising 286 up by 14 to 300 and compensating by lowering 428 by the same 14 Since I know that 14 + 14 is 28  then 28-14 is 14
So 428 - 14 = 414
So now I have 414 + 300 which I can do mentally - the answer is 714 and is also the answer to the original problem 428 + 286

Compensation works very well - bring one number up or down to a rounded number and compensate by doing the opposite to the other  - instead of 199 + 457 - try 200 + 456
Same answer and because one of the numbers is nicely rounded, it is easy to add the other. 

One more:  207 + 182  becomes 200 + 189 =389   I lowered one by 7 and raised the other one by the same 7.

4 0
3 years ago
PLEASE ANSWER!
luda_lava [24]
Let R be the greater radius and r be the smaller radius

A) Area of the sidewalk = R^2 - r^2 - This can be the expression

B) = 3.14
=(R^2-r^2)
=(11^2-9^2)
=(121-81)
=*40

That was the simplified expression

Answer = 3.14 * 40 = 125.6m^2
8 0
2 years ago
Which number is irrational?<br><br> A.0.3  B. C.0.777... D.0.454545…
Savatey [412]
Each of A, C, and D are rational, so presumably B is the answer here.

A is rational, since 10\times0.3=3, so 0.3=\dfrac3{10}.

C is also rational. If x=0.777\ldots, then 10x=7.777\ldots. This would mean 10x-x=9x=7, and so x=\dfrac79.

D is rational by a similar argument. If x=0.4545\ldots, then 100x=45.4545\ldots. So, 100x-x=99x=45, which means x=\dfrac{45}{99}=\dfrac5{11}.
6 0
2 years ago
Kenia rotated Triangle ABC 90° counterclockwise to create Triangle A’B’C’. If Kenia performed this transformation correctly, wha
bagirrra123 [75]

Answer:

B' = 105°

C = 27°

A = 48°

Step-by-step explanation:

Given

B = 105°

C = (2x - 3)°

C' = (5x - 48)°

Rotation = 90°

Before solving the requirements of this question, it should be noted that rotation do not change the angle of shapes.

i.e. an angle retain its measurements pre and after rotation.

Solving (a): The measurement of B'

Using the analysis above.

B' = B

Recall that

B = 105°

So:

B' = 105°

Solving (b): A and C

First, I'll solve for C.

Using the same analysis above.

C = C'

Substitute values for C and C'

5x - 48 = 2x - 3

Collect like terms

5x - 2x = 48 - 3

3x = 45

Multiply both sides by ⅓

⅓*3x = ⅓*45

x = 15

Substitute 15 for x in

C = (2x - 3)°

C = 2 * 15 - 3

C = 30 - 3

C = 27°

Solving for A

The sum of angles (A, B and C) is represented as:

A + B + C = 180

Substitute values for B and C

A + 105° + 27° = 180°

A + 132° = 180°

Collect like terms

A = 180° - 132°

A = 48°

4 0
3 years ago
The 80th term of an arithmetic sequence is twice the 30th term. If the first term of the sequence is 7, what is the 40th term?
VikaD [51]
It seems that "d" or the common difference is a number that makes the sequence go into the larger positive realm of numbers. Therefore, 2*(7+30d)=7+80d. d=35/100. Now just do 7 + 40(35/100) = 21. 21 is your answer!
8 0
2 years ago
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