Answer: Sample Response :Use the linear combination method.
Multiply the first equation by –2 to create opposite terms for x.
Multiply the first equation by –4 to create opposite terms for y.
Add the system of equations to eliminate a variable.
Step-by-step explanation:
Answer:
It will take 4.5hrs to cover the same distance
The constant of variation,k=252
Step by step explanation
Given that,

From the question
Time=4hr
Speed=63km
By substitution we obtain,

Cross multiplying we get,


Now,
speed=56km
Distance Covered=252km
By substitution:
We obtain,

Cross multiply

Divide through by 56


From the formula,

Which means that, speed and time varies inversely.

Let k be variation constant
This implies that


Taken,
Time=4hrs
speed=56km


Answer:
he can make 5 pillow cases before runninng out of fabric
Step-by-step explanation:
Answer:
The surface area is 54 square feet
Step-by-step explanation:
Given
The attached figure
Required
The surface area
This is calculated as:

Where

So,

