Answer:
33
Step-by-step explanation:
Here, d represents the number of push-ups Darnell completed during his previous personal best and k represent the number of push-ups Katie completed,
∵ According to the question,
Darnell's current push ups = d + 8,
Mia's push-ups = d,
Katie push-ups = d + 6
Again according to the question,
d + 8 = 35 ⇒ d = 27,
Hence, the number of push-ups completed by Katie, k = d + 6 = 27 + 6 = 33
Answer:
12 gallons of 20% salt solution
Step-by-step explanation:
Let
x -----> the number of gallons of 20% salt solution
we know that
20%=20/100=0.20
40%=40/100=0.40
25%=25/100=0.25
so
0.20(x)+0.40(4)=0.25(x+4)
Solve for x
0.20x+1.60=0.25x+1
0.25x-0.20x=1.60-1
0.05x=0.60
x=12 gallons
Answer:
10.92
Step-by-step explanation:
turn the percent into a decimal, .28
.28×39=10.92
Answer:
x = 8, 16
Step-by-step explanation:
x + 4 = 12
x = 12- 4
x = 8
x - 4 = 12
x = 12 + 4
x = 16
