Ind.
independent practice
use any method you choose to solve the equation.
mula
use an.
3x+2x-4=0
(
a.
a. -0.87, -1.54
-0.87. -16
and
o
b.
-0.87. 1.54
c. 0.87, 1.54
d. 0.87,-1.54

Step-by-step explanation:

Use the quadratic formula:

Simplify:

  D.  0.87, -1.54

Step-by-step explanation:

The easiest method I know is to let a graphing calculator show you the solutions. The graph shows solutions to be approximately -1.54 and 0.87.

4 adults and 12 babies

step-by-step explanation:

4 x 7 = 28

12 x 15 = 180

180 + 28 =208

4 x 3 = 12

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: