F is the variable. since f is equal to 6.1 you can plug it into the other equation. you multiply 2 and 6.1. this equals 12.2 then you add two. the final answer is 14.2
Answer: (f+g)(5)=37
Step-by-step explanation:
(f+g) (5) is the same as saying f(5)+g(5). Since we are given f(x) and g(x), we can use them to solve. There are two ways to solve. One is to find f(5) and g(5), and then add them together. Another way is to do (f+g)(x), then plug in x=5. I will show both methods.
Method 1
f(5)=4(5)-7 [multiply]
f(5)=20-7 [subtract]
f(5)=13
g(5)=3(5)+9 [multiply]
g(5)=15+9 [add]
g(5)=24
(f+g)(5)=13+24 [add f(5) and g(5)]
(f+g)(5)=37
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Method 2
(f+g)(x)=4x-7+3x+9 [combine like terms]
(f+g)(x)=7x+2
(f+g)(5)=7(5)+2 [plug in x=5]
(f+g)(5)=35+2 [add]
(f+g)(5)=37
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Now, we know that (f+g)(5)=37. We confirmed this with both methods.
Answer: C.
Step-by-step explanation:
The answer would be 9,372,300.
Answer:
Her average speed was 48..88 mph
Step-by-step explanation:
Use a rule of 3 to find the time she traveled at 60 mph:
60 miles ----------1 hour
40 miles ---------- x
60x = 40
x = 40/60 = 0.67 hours
She traveled 40+50= 90 miles
During 1.25+0.67= 1.92 hours
90/1.92 = 48.88 mph