# 5.4 Solve applications with systems of equations  (Page 9/11)

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Two angles are complementary. The measure of the larger angle is ten more than four times the measure of the smaller angle. Find the measures of both angles.

Wayne is hanging a string of lights 45 feet long around the three sides of his rectangular patio, which is adjacent to his house. The length of his patio, the side along the house, is five feet longer than twice its width. Find the length and width of the patio.

The width is 10 feet and the length is 25 feet.

Darrin is hanging 200 feet of Christmas garland on the three sides of fencing that enclose his rectangular front yard. The length is five feet less than five times the width. Find the length and width of the fencing.

A frame around a rectangular family portrait has a perimeter of 60 inches. The length is fifteen less than twice the width. Find the length and width of the frame.

The width is 15 feet and the length is 15 feet.

The perimeter of a rectangular toddler play area is 100 feet. The length is ten more than three times the width. Find the length and width of the play area.

Solve Uniform Motion Applications In the following exercises, translate to a system of equations and solve.

Sarah left Minneapolis heading east on the interstate at a speed of 60 mph. Her sister followed her on the same route, leaving two hours later and driving at a rate of 70 mph. How long will it take for Sarah’s sister to catch up to Sarah?

It took Sarah’s sister 12 hours.

College roommates John and David were driving home to the same town for the holidays. John drove 55 mph, and David, who left an hour later, drove 60 mph. How long will it take for David to catch up to John?

At the end of spring break, Lucy left the beach and drove back towards home, driving at a rate of 40 mph. Lucy’s friend left the beach for home 30 minutes (half an hour) later, and drove 50 mph. How long did it take Lucy’s friend to catch up to Lucy?

It took Lucy’s friend 2 hours.

Felecia left her home to visit her daughter driving 45 mph. Her husband waited for the dog sitter to arrive and left home twenty minutes (1/3 hour) later. He drove 55 mph to catch up to Felecia. How long before he reaches her?

The Jones family took a 12 mile canoe ride down the Indian River in two hours. After lunch, the return trip back up the river took three hours. Find the rate of the canoe in still water and the rate of the current.

The canoe rate is 5 mph and the current rate is 1 mph.

A motor boat travels 60 miles down a river in three hours but takes five hours to return upstream. Find the rate of the boat in still water and the rate of the current.

A motor boat traveled 18 miles down a river in two hours but going back upstream, it took 4.5 hours due to the current. Find the rate of the motor boat in still water and the rate of the current. (Round to the nearest hundredth.).

The boat rate is 18 mph and the current rate is 2 mph.

A river cruise boat sailed 80 miles down the Mississippi River for four hours. It took five hours to return. Find the rate of the cruise boat in still water and the rate of the current. (Round to the nearest hundredth.).

A small jet can fly 1,072 miles in 4 hours with a tailwind but only 848 miles in 4 hours into a headwind. Find the speed of the jet in still air and the speed of the wind.

The jet rate is 240 mph and the wind speed is 28 mph.

A small jet can fly 1,435 miles in 5 hours with a tailwind but only 1215 miles in 5 hours into a headwind. Find the speed of the jet in still air and the speed of the wind.

A commercial jet can fly 868 miles in 2 hours with a tailwind but only 792 miles in 2 hours into a headwind. Find the speed of the jet in still air and the speed of the wind.

The jet rate is 415 mph and the wind speed is 19 mph.

A commercial jet can fly 1,320 miles in 3 hours with a tailwind but only 1,170 miles in 3 hours into a headwind. Find the speed of the jet in still air and the speed of the wind.

## Everyday math

At a school concert, 425 tickets were sold. Student tickets cost $5 each and adult tickets cost$8 each. The total receipts for the concert were $2,851. Solve the system $\left\{\begin{array}{c}s+a=425\hfill \\ 5s+8a=2,851\hfill \end{array}$ to find $s$ , the number of student tickets and $a$ , the number of adult tickets. $s=183,a=242$ The first graders at one school went on a field trip to the zoo. The total number of children and adults who went on the field trip was 115. The number of adults was $\frac{1}{4}$ the number of children. Solve the system $\left\{\begin{array}{c}c+a=115\hfill \\ a=\frac{1}{4}c\hfill \end{array}$ to find $c$ , the number of children and $a$ , the number of adults. ## Writing exercises Write an application problem similar to [link] using the ages of two of your friends or family members. Then translate to a system of equations and solve it. Answers will vary. Write a uniform motion problem similar to [link] that relates to where you live with your friends or family members. Then translate to a system of equations and solve it. ## Self check After completing the exercises, use this checklist to evaluate your mastery of the objectives of this section. On a scale of 1-10, how would you rate your mastery of this section in light of your responses on the checklist? How can you improve this? #### Questions & Answers Larry and Tom were standing next to each other in the backyard when Tom challenged Larry to guess how tall he was. Larry knew his own height is 6.5 feet and when they measured their shadows, Larry’s shadow was 8 feet and Tom’s was 7.75 feet long. What is Tom’s height? genevieve Reply 6.25 Ciid Wayne is hanging a string of lights 57 feet long around the three sides of his patio, which is adjacent to his house. the length of his patio, the side along the house, is 5 feet longer than twice it's width. Find the length and width of the patio. Katherine Reply complexed. could you please help me figure out? Ciid (sin=opp/adj) (tan= opp/adj) cos=hyp/adj tyler (sin=opp/adj) (tan= opp/adj) cos=hyp/adj dont quote me on it look it up tyler (sin=opp/adj) (tan= opp/adj) cos=hyp/adj dont quote me on it look it up tyler (sin=opp/adj) (tan= opp/adj) cos=hyp/adj dont quote me on it look it up tyler SOH = Sine is Opposite over Hypotenuse. CAH= Cosine is Adjacent over Hypotenuse. TOA = Tangent is Opposite over Adjacent. tyler H=57 and O=285 figure out what the adjacent? tyler Amara currently sells televisions for company A at a salary of$17,000 plus a $100 commission for each television she sells. Company B offers her a position with a salary of$29,000 plus a $20 commission for each television she sells. How many televisions would Amara need to sell for the options to be equal? Marisol Reply what is the quantity and price of the televisions for both options? karl Amara has to sell 120 televisions to make 29,000 of the salary of company B. 120 * TV 100= commission 12,000+ 17,000 = of company a salary 29,000 17000+ Ciid Amara has to sell 120 televisions to make 29,000 of the salary of company B. 120 * TV 100= commission 12,000+ 17,000 = of company a salary 29,000 Ciid I'm mathematics teacher from highly recognized university. Mzo Reply here a question professor How many soldiers are there in a group of 27 sailors and soldiers if there are four fifths as many sailors as soldiers? can you write out the college you went to with the name of the school you teach at and let me know the answer I've got it to be honest with you tyler is anyone else having issues with the links not doing anything? Helpful Reply Yes Val chapter 1 foundations 1.2 exercises variables and algebraic symbols theresa Reply June needs 45 gallons of punch for a party and has 2 different coolers to carry it in. The bigger cooler is 5 times as large as the smaller cooler. How many gallons can each cooler hold? Enter the answers in decimal form. Samer Reply Joseph would like to make 12 pounds of a coffee blend at a cost of$6.25 per pound. He blends Ground Chicory at $4.40 a pound with Jamaican Blue Mountain at$8.84 per pound. How much of each type of coffee should he use?
Samer
4x6.25= $25 coffee blend 4×4.40=$17.60 ground chicory 4x8.84= 35.36 blue mountain. In total they will spend for 12 pounds $77.96 they will spend in total tyler DaMarcus and Fabian live 23 miles apart and play soccer at a park between their homes. DaMarcus rode his bike for three-quarters of an hour and Fabian rode his bike for half an hour to get to the park. Fabian’s speed was six miles per hour faster than DaMarcus’ speed. Find the speed of both soccer players. Sage Reply i need help how to do this is confusing Alvina Reply what kind of math is it? Danteii help me to understand Alvina Reply huh, what is the algebra problem Daniel How many soldiers are there in a group of 27 sailors and soldiers if there are four fifths many sailors as soldiers? tyler What is the domain and range of heaviside Christopher Reply What is the domain and range of Heaviside and signum Christopher 25-35 Fazal The hypotenuse of a right triangle is 10cm long. One of the triangle’s legs is three times the length of the other leg. Find the lengths of the three sides of the triangle. Edi Reply Tickets for a show are$70 for adults and $50 for children. For one evening performance, a total of 300 tickets were sold and the receipts totaled$17,200. How many adult tickets and how many child tickets were sold?
A 50% antifreeze solution is to be mixed with a 90% antifreeze solution to get 200 liters of a 80% solution. How many liters of the 50% solution and how many liters of the 90% solution will be used?
June needs 45 gallons of punch for a party and has 2 different coolers to carry it in. The bigger cooler is 5 times as large as the smaller cooler. How many gallons can each cooler hold?