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9966 [12]
2 years ago
15

Please help me with this

Mathematics
1 answer:
Serjik [45]2 years ago
5 0

Answer: you should study, plus give me brainliest please. lol

Step-by-step explanation:

and the other answer might be a bot sending links to websites with malware, please dont .open the link unless you want malware on your device, if its fake. and you cant make websites/ links just to post answers. this is a warning.

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There are seven children in the Arthur family, including one set of twins. The youngest child is 6 years old, and the oldest is
Snowcat [4.5K]
One is 6 years old, one is 16 as per the rules. Now we have 5 unknowns, of which either the twins can be both a part of, or one can be either 6 or 16 as well.

Since the mode is the most frequently occurring number, let's assume that 15 years old appears twice to make it so.

Now we have one 6 y.o, two 15 y.os, and one 16 y.o.

Out of 7 kids, the middle child has to be 10 years old to secure the median.

Now we just have two missing, and we need to figure out the mean. 6+15+15+10+16 is 62, dividing by 5 is 12.4 The mean is currently 12.4 years old. For the mean to be 11, the combined total has to be 77 (since 77/7 kids is 11 mean) 77-62 is 15. But to make sure the median stays 10, both of those kids have to be less than 10 but more than 6. Therefore, their ages must be 7 and 8.

Their ages are 6, 7, 8, 10, 15, 15, 16

Let's double check to make sure we have all the qualifications. 7 kids, check. Youngest 6, check. Oldest 16, check. Twins, check. Median of 10, check. Mode of 15, check. Average of 11, well 6+7+8+10+15+15+16 is 77, 77/7 is 11, so check. Phew.

5 0
3 years ago
Four times the sum of a number and -3 is 4 more than twice the number. Write and solve an equation to find the number.
Sindrei [870]
Let the unknown number be x.

4*(x + (-3)) = 4 + 2x

4x -12 = 4 + 2x

2x = 16

x = 8

Hence, the number is 8.
7 0
3 years ago
Need help on this question please
aliina [53]

Answer:

lines are perpendicular

Step-by-step explanation:

The equation of a vertical line parallel to the y- axis is

x = c

Where c is the value of the x- coordinates the line passes through

x = - 1 ← is the equation of a vertical line

The equation of a horizontal line parallel to the x- axis is

y = c

Where c is the value of the y- coordinates the line passes through

y = - 1 ← is a horizontal line

Since lines are vertical and horizontal they are perpendicular to each other.

4 0
3 years ago
Read 2 more answers
Solve the following equation<br>1) 2c + c + 12 = 78​
Annette [7]

Step-by-step explanation:

(2c+c) + 12 =78

3c + 12 = 78

78 - 12 = 66

66 ÷ 3 = 22

22 + 22 + 22 + 12 = 78

{ C = 22 }

4 0
3 years ago
11) Yolanda collects trading cards, and she has started her younger brothers, Xavier and Zach, collecting cards as well.
nydimaria [60]

Answer:

nfefn cjd cnd c

efnckjd sc

Step-by-step explanation:evs kd vjkdfxds

6 0
3 years ago
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