Answer:
x+y=28
70x+140y=3360
8 cats, 20 dogs were sold
Step-by-step explanation:
Let x=cats y=dogs
We know that a total of 28 pets were sold which means that
x+y=28
We also know that they made 3360 which means that
70x+140y=3360
It doesn't really say if you need to solve this but I will anyways
We use the first equation (x+y=28) and subtract 28 and y from both sides to get
x-28= -y we can then divide both sides by -1 so y can be a positive
-x+28=y
This is what y equals in terms of x and so we can plug this in for y in the second equation
70x+140(-x+28)=3360
Distribute the 140 and get
70x-140x+3920=3360
Add like terms and subtract 3920 to get
-70x=-560
divide both sides by -70 and get
x=8
We now know that 8 cats were sold and can plug this value into any equation to solve for y ( I will be using the first one because that's easiest)
8+y=28
subtract 8 and get
y=20
Answer: No
Step-by-step explanation:
5 + 1/2 = 5 1/2
For this case we have the following expression:
1 / z = (4/5) / (8)
Rewriting we have:
1 / z = 4/40
1 / z = 1/10
Clearing the value of z we have:
z = 10
Answer:
The value of z for this case is given by:
z = 10
Answer:
Step-by-step explanation:
Let the time Ajay and Bala took to meet be t, speed of Ajay be a and speed of Bala be b
<u>Until they met, the distance they made:</u>
Now, the rest of the distance took Ajay 16 min and Bala 9 min.
<u>We can compare the distances as:</u>
<u>From the first equation we have:</u>
<u>From the second equation we have:</u>
<u>Comparing:</u>
- t/16= 9/t
- t² = 9*16
- t² = 144
- t = √144
- t = 12 min
<u>The meting time is:</u>
- 9:00 am + 12 min = 9:12 am
Step-by-step explanation:
the height from the right angle in a right-angled triangle is the square root of the product of the segments of the Hypotenuse the height is splitting it into.
so,
x = sqrt(7×9) = sqrt(63) = 3×sqrt(7)