the first group of 10 children has a mean weight of 15.6 kg, the second group of another 10 children has a mean weight of 16 kg, and the third group of children has a mean weight of 20 kg. if the mean weight of all the children is 17 kg, what is the total number of children in all of the three groups?

5050

hope this !

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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i believe your answer is 99.7% of 7-year-old children are between 46.6 inches and 49.5 inches tall.

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right