A number is equal to 3 times a smaller number. Also, the sum of the smaller number and 4 is the larger number. The situation is graphed on the coordinate plane below, where x represents the smaller number and y represents the larger number.
c,
y=3x and y=x+4
Answer:
First brand = 18 gallons
Second brand = 12 gallons
Step-by-step explanation:
Let the first brand brand be A and the second brand be B.
Thus, since he wants to obtain 30 gallons of a mixture that contains 30% pure antifreeze, then we have;
A + B = 30 - - - (eq 1)
Also; The first brand is 20% pure antifreeze, and the second brand is 45% pure antifreeze. Thus;
0.2A + 0.45B = (0.3 × 30)
0.2A + 0.45B = 9 - - - (eq 2)
From eq 1, we have; A = 30 - B
Put 30 - B for A in eq 2;
0.2(30 - B) + 0.45B = 9
6 - 0.2B + 0.45B = 9
0.25B = 9 - 6
0.25B = 3
B = 3/0.25
B = 12
Thus, A = 30 - 12 = 18 gallons
Answer:
16
Step-by-step explanation:
Evaluate the function. f(x) = 4x2 + 4x - 4 Find f(3)
f(3) = 4 x 2 + 4(3) - 4
After this step conduct PEMDAS
f(3) = 4 x 2 + 12 - 4
f(3) = 8 + 12 - 4
f(3) = 20 - 4
f(3) = 16
Answer:300
Step-by-step explanation: 10×10 =100
3×100 = 300
Answer:
C is da answer
Step-by-step explanation:
