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Tomtit [17]
3 years ago
10

Which ones are correct please help me.

Mathematics
2 answers:
Angelina_Jolie [31]3 years ago
6 0
<h3>2 Answers: Choice A and choice C</h3>

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

Explanation:

AB = BC refers to the fact that expressions 2x+7 and 4x-3 are equivalent. They represent numbers when we replace x with some number. So after doing that replacement, we have something in the form number = number.

So this is why choice A is one of the answers.

\overline{AB} \cong \overline{BC} says "segment AB is congruent to segment BC". The horizontal lines over the lettering indicates we have a segment. The equal sign with a squiggle over top is the congruence symbol. In geometry, we say two items are congruent if they are the same. You can think of making a clone of the object and then sliding it over. In this case, we've cloned segment AB to form segment BC.

This is why choice C is the other answer.

--------------

Choices B and D are close, but not quite correct. Choice B is missing the segment markers. Choice D is missing the congruence symbol. Congruence and equality are very similar ideas, so often they get mixed up.

jeka943 years ago
5 0

Answer:

I think it's the third choice because line segments are congruent and not equal. Line segments also have little lines on top of the letters.

Step-by-step explanation:

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A bag contains white marbles and red marbles, 20 in total. The number of white marbles is 5 more than 2 times the number of red
Nitella [24]

Answer:

15

Step-by-step explanation:

let r represent red marbles then white = 2r + 5 and total is 20, thus

r + 2r + 5 = 20 ( subtract 5 from both sides )

3r = 15 ( divide both sides by 3 )

r = 5 ← number of red marbles

Thus number of white = 20 - 5 = 15

7 0
3 years ago
The expression above should be further simplified for which value of x?
stellarik [79]

Answer: A) 35

Step-by-step explanation:

We have the following:

\sqrt{215 x}

Now, 215 is made up of two factors, 43 and 5:

215=(43)(5)

So, we have to choose a number for x containing a factor of 43 and or 5. In this case, the best option is 35=(7)(5):

Hence:

\sqrt{215 (35)}=\sqrt{(43)(5)(7)(5)}

\sqrt{215 (35)}=\sqrt{(25)(43)(7)}=\sqrt{25} \sqrt{301}

Finally:

\sqrt{215 (35)}=5 \sqrt{301}

7 0
4 years ago
Food bill:$55 sales tax:8 tip:10%
Romashka [77]

Answer:

$65.34

Step-by-step explanation:

Multiply $55 by 0.08. Then multiply $55 by 0.1. Then add the two.

4 0
3 years ago
Find the angle measures
Svetach [21]

Answer:

1. 45

2. 45

3. 90

4. 45

5. 45

6. 60

7. 60

8. 60

9. 60

10. 60

Step-by-step explanation:

5 0
3 years ago
The sum of the 8th element and the 12th element of an arithmetic progression
jeka94

Answer:

448

Step-by-step explanation:

aₙ = a₁ + (n-1)d

a₈ = a₁ + (8-1)d = a₁ + 7d

a₁₂ = a₁ + 11d

a₈ + a₁₂ = 246 = 2a₁ + 18d            a₁ + 9d = 123

a₁₀ + a₁₄ = a₁ + 9d + a₁ + 13d = 298     a₁ + 11d = 149

2d = 26

d = 13

a₁ = 6

a₃₅ = 6 + (35-1) x 13 = 448

7 0
3 years ago
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