BWStar

okay we set up and equation.

10 + 5m is how many cards will gets, where m is months

20 + 3m is how many cards thomas gets, where m is months.

lets see how many months it will take for them to be equal:

10 + 5m = 20+ 3m

5m = 10 +3m

2m = 10

m = 5

it will take 5 months for them to have the same amount of cards.

he grew 1.5 inches, or 6/4 inches, a total of 6 1/4 inches. 6*(3/4) = 4.5.

If he gained 4.5 pounds, then he would be 64 + 4.5 = 68.5 pounds

9*8+7*4

If I had to use all the numbers, then

0+1+2+3+4+5+6+7+8*9

2700 * (98.6/100)^5 = ~2516.21 dollars.

12 packages * 35 cards = 420 total cards.

1/7 of 420 = 420 * 1/7 = 60

if 60 cards were pitchers, then 420-60 = 360 cards were batters

I assume you mean how to turn a repeating fraction like 0.99 repeating into a fraction?

Inorder to turn a repeating decimal into a fracation:

x = 0.99

10x = 9.99 i only multipplied x by 10^1 because the pattern is one long. if the decimal was something like 1.27272727, and repeats every two, do 10^2

10x-x = 9.99-0.99 this cancles out the repeating part of the fraction

9x = 9

x = 1/1

This is also a proof to why 0.99 repeating = 1.

Assuming youre asking how to simplify a fraction (idk you never know ig), simply find all the prime factors of the numerator and denominator.

For 2/4 it is 2/2*2. Then factor it out. 2/2*2 = 1/2.

-4.5 < t <= 2.25

Im not sure what subsituting it into the third equation, but the answer to the first system of equation is 

(87/17, -92/17). Hopes this helps

It is a formula to find the area of a triangle, given the sides. Google has a good explanation of exactly what it is.

using herons formula we get that the area of the first triangle is 60. We then plug this into heron's formula again, except with the third side as x this time, and the area. from this we get x = x = +/- 10 and x= +/- 24. X is 24.