25t-87.5=12.5 what is the value of t

Step-by-step explanation:

Hi there!

25t-87.5=12.5

In order to solve this, you'd just simplify.

25t-87.5+87.5=12.5+87.5

25t=100

t=4

Have a great day! ^u^

To find the value of t, you need to isolate/get the variable "t" by itself in the equation:

25t - 87.5 = 12.5    Add 87.5 on both sides

25t - 87.5 + 87.5 = 12.5 + 87.5

25t = 100      Divide 25 on both sides to get "t" by itself

t = 4

PROOF

25t - 87.5 = 12.5      Substitute/plug in 4 into "t"

25(4) - 87.5 = 12.5

100 - 87.5 = 12.5

12.5 = 12.5

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:

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb