<span>Given that f(x) = 2x + 5 and g(x) = x − 7
</span>f(g(x)) = 2(x − 7) + 5
f(g(x)) = 2x - 14 + 5
f(g(x)) = 2x - 9
when x = −3 , f(g(-3)) = 2(-3) - 9 = - 6 - 9 = -15
Answer
<span>A. −15</span>
Lets do this like this:
X = number of quarters and y=number of dimes.
Now, we know that the total number is 35 and that the change adds up to 6.50.
One equation we can form is <span>x+y=35</span>Remember the total number of coins is 35.
The other equation is <span>25x+.1y=6.5</span>Because the number of dimes times their value plus the number of quarters times their value gives us a total of 6.5. Now we can solve for x or y easily in the first equation.
Solving for y like this:<span>y=35−x</span>We can substitute this into the other equation to obtain<span>.25x+.1(35−x)=6.5</span>This simplifies to<span>.15x+3.5=6.5</span><span>.15x=3</span><span>x=<span>20
I hope this can help you indeed</span></span>
700*.9=630, 700-630=70. So 90% of 700 equals 70. Hope this helps! :)
Answer:
48
Step-by-step explanation:
not sure
Step 1:
Put the information given in the word problem into the equation p(x)=0.09x+c. So plug in 1,570 for x and 490.30 for p(x).
490.30 = 0.09 (1,570) + c
490.30 = 141.3 +c
-141.3 -141.3
--------------------------------------
349 = c
Step 2: Check your work!
490.30 = 0.09 (1,570) + 349
490.30 = 141.3 + 349
490.30 = 490.30