Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
Answers number 30 and 32
![Classwork # 10 (Word
Problems Three Variables)
12/1/20
1:06 AM
(2+ sy- 32 = 5
LP
STEM 30. Manufacturing In a factory there are three machines, A, B, and C. When all three
machines are working, they produce 287 bolts per hour. When only machines A
and Care working, they produce 197 bolts per hour. When only machines A and B
are working, they produce 202 bolts per hour. How many bolts can each machine
produce per hour?
© 31. Think About a Plan In triangle PQR, the measure of angle Q is three times the
measure of angle P. The measure of angle R is 20°more than the measure of angle P.
Find the measure of each angle.
• What are the unknowns in this problem?
• What system of equations represents this situation?
• Which method of solving looks easier for this problem?
32. Sports A stadium has 49,000 seats. Seats sell for $25 in Section A, $20 in
Section B, and $15 in Section C. The number of seats in Section A equals the total
number of seats in Sections B and C. Suppose the stadium takes in $1,052,000 from
each sold-out event. How many seats does each section hold?
Answer numbers 30 and 32.
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