To answer this item, we let x be the time for the faster plane and h be the distance traveled which is the same for both planes. Distance is calculated by multiplying speed and time. Thus,
(558)(x) = (496)(x + 0.5)
The value of x from the equation is 4.
F:m:s=4:5:7
s=f+18 and from above we see s/f=7/4 so s=7f/4 now we can say:
f+18=7f/4
4f+72=7f
3f=72
f=24 and we know s=f+18 so
s=42
m/s=5/7 so m=42*5/7=30
So Frank got 24, Mary got 30, and Seth got 42.
Answer:
the coins and stamps do each of you collect is 25, 45, 5 and 90 respectively
Step-by-step explanation:
The computation is shown below:
For you
Let us assume the coins be x
Let us assume the stamps be y
For friend
The coins be 1 ÷ 5x = 0.2x
And, the stamps be 2y
Now the equations are
x + y = 70
y = 70 - x
Now put the value of y in other equation
0.2x + 2y = 95
0.2x + 2(70 - x) = 95
0.2x + 140 - 2x = 95
-1.8x = -45
x = 25
And, y = 70 - 25
= 45
And, for your friend it is
= 25 × 1 ÷ 5
= 5
And, the stamps be
y = 45 × 2
= 90
Hence, the coins and stamps do each of you collect is 25, 45, 5 and 90 respectively
Answer:
-13
Step-by-step explanation:
just put -3 in stead of x in the given equation
and you'll get
-9-4=-13