45(2x+5)−4=1 what does x equal? x=1 1/4 x=1 3/5 x=5/8 x=3 1/5

remember, you can do anything to an equaiton as long as you do it to both sides

45(2x+6)-4=1

add 4 to both sides

45(2x+5)=5

divide both sides by 45

2x+5=5/45

2x+5=1/9

minus 5 from both sides

mulitply both sides by 1/2

simplify

[tex]x=2+\frac{5}{9}[tex]

the answer is none of the above unless you wrote the equation wrong

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: