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Rzqust [24]
2 years ago
6

Q3. The average of following number is 5. The numbers

Mathematics
1 answer:
Fantom [35]2 years ago
4 0

Answer:

10

Step-by-step explanation:

\frac{2+3+4+5+6+x}{6} =5\\\frac{20+x}{6} =5\\20+x=30\\x=10

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A placebo is a substance that should elicit no positive response in an experimental subject.
adelina 88 [10]

Answer:

  A)  True

Step-by-step explanation:

In an experiment that has the purpose of testing the efficacy of a procedure or drug, comparison is made against the efficacy of a placebo, a procedure or drug that is <em>intended to have no effect whatever</em>.

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Famously, a placebo is often found to be nearly as effective (or even more effective) than the procedure or drug on trial. This effect is known as "the placebo effect."

7 0
3 years ago
What do symbols represent in algebra?
Inessa05 [86]

Answer:

One of the most common algebraic symbols is the use of x, y or another letter of the alphabet to indicate a variable or unknown quantity. Common symbols used in algebra also include those related to equality, inequality, factorials and organization, like braces, brackets and parentheses.

Give brainiest please ;-;

7 0
3 years ago
Read 2 more answers
Find the value of x.
astra-53 [7]

Answer:

10

Step-by-step explanation:

7x+5 = 9x -15

5 = 2x -15

2x = 20

x = 10

6 0
2 years ago
6.29 rounded to a whole number
Mandarinka [93]
If your were to round 6.29 to the nearest whole number it would round to 6, because the tenths place is less than 5.
7 0
3 years ago
Read 2 more answers
Given: segment AB || segment DE, C is the midpoint of segment DB. Prove: ΔACB ≅ ΔECD Fill in the missing reason for the proof. A
OleMash [197]

Answer:

Given: Segment AB || segment DE, C is the midpoint of segment DB.

Prove: ΔA CB ≅ ΔE CD

Proof: In ΔA CB and ΔE CD

 C is the Mid point of B D.

BC=C D→ definition of midpoint

∠A CB= ∠ EC D→→vertical angles are congruent

∠BAC=∠DEC→→[AB║DE,so alternate angles are equal]

→→ΔA CB ≅ ΔE CD[A AS or A SA]

Option B: vertical angles are congruent

4 0
3 years ago
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