Select the statement that correctly describes the solution to this system of equations. 3x y = -2 x - 2y = 4 A. There is no solution. B. There are infinitely many solutions. C. There is exactly one solution at (-2, -4). D. There is exactly one solution at (0, -2). Put a number into each box to create an equation that has exactly one real solution. 4x 3= (x ( b. Put a number into each box to create an equation that has no real solution. 4x 3= () x + () C. Put a number into each box to create an equation that has an infinite number of solution.

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step-by-step explanation:

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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:

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870