Newborn babies: A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights of 673 babies born in New York. The mean weight was 2980 grams with a standard deviation of 836 grams. Assume that
birth weight data are approximately bell-shaped. Estimate the number of newborns who weighed between 2144 grams and 3816
grams. Round to the nearest whole number.
The number of newborns who weighed between 2144 grams and 3816 grams is

step-by-step explanation:

12475909

37/3

step-by-step explanation:

step 1: simplify both sides of the equation.

7x+8(x+

1

4

)=3(6x−9)−8

7x+(8)(x)+(8)(

1

4

)=(3)(6x)+(3)(−9)+−8(distribute)

7x+8x+2=18x+−27+−8

(7x+8x)+(2)=(18x)+(−27+−8)(combine like terms)

15x+2=18x+−35

15x+2=18x−35

tep 2: subtract 18x from both sides.

15x+2−18x=18x−35−18x

−3x+2=−35

step 3: subtract 2 from both sides.

−3x+2−2=−35−2

−3x=−37

step 4: divide both sides by -3.

−3x

−3

=

−37

−3

x=

37

3

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry