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Topic: **Parenthesis in math problems****Question:**
how do you do this? given f(x) = x+4/4 and g(x) = x^2+5 find ( G o F)(1)
and given f(x) = x+8/x and g(x) =x^2 -8 find (G o F)(-5)
couls u please show the steps

July 18, 2019 / By Burt

f(x) is a function that means you take a value (x) and you do to it what the f(x) function says. this problem is about combining two function by making one function the input (or "x") of the another function (G o F)(1) means take the function f(x)) at x=1 and then take the result of that and evaluate g(x) of that sort of like g(f(1) so f(x)=(x+4)/4 I put those parenthesis in because I am GUESSING that's how the problem was meant meaning it showed the x+4 all over 4, not just the 4 f(1)=(1+4)/4=5/4 g(-3/4)=(5/4)^2+5 25/16+5 25/16+80/16 105/16 you better check my arithmetic (and I may have interpreted your fraction incorrectly) but perhaps this helps you get the idea

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Did you like the answer? We found more questions related to the topic: **Parenthesis in math problems**

1.Gerhart bought a 3.95 bagel, a 1.45 dish of rice pudding, and a 1.10 cup of coffee for lunch. He left 1.30 tip. the tip was what percent of the cost of gerhart's food? the food cost 6.50 1.30= what percent of 6.50 1.3/6.5= what percent 1/5=what percent .2 = what percent 20% --------------------------------------... 2.Winona and Tom went to dinner and left a 6.48 tip, which was exactly 18 percent of the total bill. how much was the bill? 6.48=.18 B 6.48/.18=B 36=B $36 ----------------------------- 3. Inez bought a 5.95 ceaser salad and a 2.45 bowl of soup for lunch. she left a 20 percent tip of the food total on the table. the final bill included a 5 percent sales tax on the food total. how much did inez spend on lunch? 5.95+2.45=8.40 20% 0f this is 1.68 5% of this is .42 add them get $10.50

1. So Gerhart pays 3.95, 1.45, and 1.10, for a total of 6.50. To find the percentage that the tip is, you divide the tip by the cost of the food. 1.30/6.50 =.2, or 20%. 2. If the tip is 18% of the bill, that means that 6.48/X(the total bill) = .18 If you cross multiply, you get that 6.48/.18 = X, so X, the total bill, is 36 dollars. 3. 5.95 + 2.45 = 8.40 for the food. 20 % of the food is 1.68, so now the total is 10.08 for the food and the tip. The sales tax = 8.4 times .05, which equals .42. Therefore, the total that she pays is 10.08+.42=10.50. Hope this helps!

f(1) = 1 + 4/4 f(1) = 5/4 g(5/4) = (5/4)^2 + 5 g(5/4) = 25/16 + 5 do the same for the other one. Once you find f(-5), plug that value into g(x).

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f(x) = (x + 4)/4 f(1) = (1 + 4) / 4 f(1) = 5/4 g(x) = x² + 5 g(f(x)) = (5/4)² + 5 g(f(x)) = 25/16 + 5 g(f(x)) = 25/16 + 80/16 g(f(x)) = 105 / 15 g(f(x)) = 7 ¯¯¯¯¯¯¯¯¯ f(x) = (x + 8) / x g(x) = x² - 8 g(f(x)) = [(x + 8) / x]² - 8 g(f(x)) = [(x + 8)² / x²] - 8 g(f(x)) = [(x + 8)² - 8x²] / x² g(f(x)) = (x² + 16x + 64 - 8x²) / x² g(f(x)) = (- 7x² + 16x + 64) / x² ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

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Hi, This is my way to solve this kind of problems. You make a table like this : http://www.imagup.com/data/1107128309.ht... Now you say that the %age of water must be 40%, and you solve the equation : 0.9x /(x+5) = 40% 0.9x /(x+5) = 0.4 x+5 = 0.9x/0.4 0.4x + 2 = 0.9x 0.5x = 2 x = 4 liters There was 4 liters of solution initially, containing 90% water, i.e. 3.6 liters of water. Same quantity at the end. I hope it helped Bye !!

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