3a.

Explanation:
the mean, first of all, is the average. so, you need to find the average between 2 ans 4 since it has the same label. 2+4=6. 6/2=3
Answer: 3a

8 0

3 years ago

Two numbers are respectively twenty percent and ten percent more than the third number. How many percent is the first number mor

Rasek [7]

Answer:

10%

Step-by-step explanation:

Let the third number is X.

then first number = (100-30)% of X

= 70% of X = 7X/10

Second number is (63X/100)

Difference = 7X/10 - 63X/100 = 7X/10

So required percentage is, difference is what percent of first number

=> (7X/100 * 10/7X * 100 )% = 10%

4 0

3 years ago

Х+ 2y = -1<br> 2x – Зу = 12

yarga [219]

Use substitution method

4 0

3 years ago