TO ELIMINATE X, what does Rachel need to do first? 1 point
Rachel wants to eliminate the variable x to solve the system shown What does she need to do before
combining the equations?
7x + 3y = -1
-6x+2y = 9
Add the equations to eliminate y.
b Subtract the equations to eliminate y
C Divide the first equation by 7
d Multiply each term in 7x + 3y = -1 by 6 and multiply cach term in -6x + 2y = 9 by 7.
a

first one is a: renaming a fraction. second one is c: de-c

step-by-step explanation:

my explanation is that these were the answers on edg : )

answer: howdy

step-by-step explanation:

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:

8+10

step-by-step explanation:

you multiply 4 by 2 and 5 by 2