What is the solution to the multi step equation 4d-2+3d=61? justify your steps. then check your solution.

Step-by-step explanation:

first you add the 4d and the 3d then you subtract 2 from both sides and then you get 7d =59 . then you divide 7 from both sides and get d=52 and thast your final answer

d=9

Step-by-step explanation:

4d−2+3d=61

Step 1: Simplify both sides of the equation.

4d−2+3d=61

4d+−2+3d=61

(4d+3d)+(−2)=61(Combine Like Terms)

7d+−2=61

7d−2=61

Step 2: Add 2 to both sides.

7d−2+2=61+2

7d=63

Step 3: Divide both sides by 7.

7d7=637

d=9

can you put the picture up?

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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