0/ 99% 4G v m 7:40 ZONE Graph the following functions 4 f(x) =x - 1 15) 16) f(x) 5 Solve the system of linear equations by substitution — Зх — 5у %3D — 17 4х — у %3D —8 17) 18) Solve the system of linear equations by elimination 8x + 4y 0 4х — 2у 3D 2 19) Solve the system of linear equations by the method of your choice 2х — 5у 3D 11 Зх + у %3D 8 20) Solve the system of linear equations by the method of your choice х+7у %3D 3 3x 9y 21 Solve each application problem. An architect designed a rectangular pool for one of her clients. The length of the pool is 12 feet longer than twice the width of the pool. The perimeter of the pool is 168 feet. Determine the length and the width of the pool. 21) Two days to Sea World and three days at Islands of Adventure, both in Orlando, costs $323.90. Three days a Sea World and two days at Islands of Adventure costs $305.10. How much does one day cost at each park? 22) Kim the chemist needs 50 liters of a 26% acid solution. She wants to mix a 20% solution 23) with a 36% solution. How much of the 20% solution and the 36% solution does she need to use to achieve her goal? =

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.2: Direct Methods For Solving Linear Systems
Problem 2BEXP
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I don't know where I keep doing wrong on #22 

0/ 99%
4G
v m
7:40
ZONE
Graph the following functions
4
f(x) =x - 1
15)
16)
f(x) 5
Solve the system of linear equations by substitution
— Зх — 5у %3D — 17
4х — у %3D —8
17)
18)
Solve the system of linear equations by elimination
8x + 4y 0
4х — 2у 3D 2
19)
Solve the system of linear equations by the method of your choice
2х — 5у 3D 11
Зх + у %3D 8
20)
Solve the system of linear equations by the method of your choice
х+7у %3D 3
3x 9y 21
Solve each application problem.
An architect designed a rectangular pool for one of her clients. The length of the pool is 12
feet longer than twice the width of the pool. The perimeter of the pool is 168 feet.
Determine the length and the width of the pool.
21)
Two days to Sea World and three days at Islands of Adventure, both in Orlando, costs
$323.90. Three days a Sea World and two days at Islands of Adventure costs $305.10. How
much does one day cost at each park?
22)
Kim the chemist needs 50 liters of a 26% acid solution. She wants to mix a 20% solution
23)
with a 36% solution. How much of the 20% solution and the 36% solution does she need
to use to achieve her goal?
=
Transcribed Image Text:0/ 99% 4G v m 7:40 ZONE Graph the following functions 4 f(x) =x - 1 15) 16) f(x) 5 Solve the system of linear equations by substitution — Зх — 5у %3D — 17 4х — у %3D —8 17) 18) Solve the system of linear equations by elimination 8x + 4y 0 4х — 2у 3D 2 19) Solve the system of linear equations by the method of your choice 2х — 5у 3D 11 Зх + у %3D 8 20) Solve the system of linear equations by the method of your choice х+7у %3D 3 3x 9y 21 Solve each application problem. An architect designed a rectangular pool for one of her clients. The length of the pool is 12 feet longer than twice the width of the pool. The perimeter of the pool is 168 feet. Determine the length and the width of the pool. 21) Two days to Sea World and three days at Islands of Adventure, both in Orlando, costs $323.90. Three days a Sea World and two days at Islands of Adventure costs $305.10. How much does one day cost at each park? 22) Kim the chemist needs 50 liters of a 26% acid solution. She wants to mix a 20% solution 23) with a 36% solution. How much of the 20% solution and the 36% solution does she need to use to achieve her goal? =
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