Answer:
15.0
Step-by-step explanation:
answer attached
hope this helps!
X = cups of tea per hour
y = cups of coffee per hour
David makes 30 cups of tea per hour = 30x
David works for D hours this week.
Therefore number of weekly cups of tea = number of hours * cups of tea per hour
This is 30x * D = 30Dx
For Andrew, it is similar
30Ay
Because Andrew made an additional 10 cups, then it is 30Ay + 10
(cups of coffee this week)
Answer:
In problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. To find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.
Step-by-step explanation:
In problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. To find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.
Answer:
Step-by-step explanation:
Firstly, we've to interchange the variables.
Solving for y
Adding 3 to both sides
Multiplying 2 to both sides
Taking cosine on both sides
Dividing both sides by y
Replace y by
=>
Answer/Step-by-step explanation:
a. Unknown side, b, using the Pythagorean theorem is solved as shown below.
Unknown side, b, = 36 km
b. Perimeter of the triangle = sum of all the sides of the ∆ =
c. Area of triangle = ½*base*height
where,
Base = 36 km
Height = 27 km