News
Get Premium
Dashboard

Dashboard Sign out
Big Ideas Math: Modeling Real Life, Grade 7
BI
Big Ideas Math: Modeling Real Life, Grade 7 View details
4. Writing and Solving Proportions
Continue to next subchapter
search

Exercise 10 Page 205

Solve for the variable by using the Cross Products Property.

x = 3

Practice makes perfect
For the given ratios to be equivalent, we need them to be proportional. First we will write them as fractions and then we can set them equal to one another. Then we will have a proportion that we can solve for x. rc First Ratio: & 2:4 ⇒ 2/4 [0.8em] Second Ratio: & x:6 ⇒ x/6 [0.8em] Proportion: & 2/4=x/6 To solve the proportion, we have to isolate x on one side. Using the Multiplication Property of Equality, we will multiply both sides of the equation by 6. This will eliminate the denominator of the fraction and isolate x.
2/4=x/6
MultEqn

LHS * 6=RHS* 6

6 * 2/4=6 * x/6
DenomMultFracToNumber

6 * a/6= a

6 * 2/4= x
MoveLeftFacToNum

a*b/c= a* b/c

12/4 = x
CalcQuot

Calculate quotient

3 = x
RearrangeEqn

Rearrange equation

x = 3
Subchapter links expand_more
arrow_right Try It p.204-206
1
Try It 2 (Page 204)
Try It 3 (Page 204)
Try It 4 (Page 204)
Try It 5 (Page 204)
Try It 6 (Page 204)
Try It 7 (Page 205)
Try It 8 (Page 205)
Try It 9 (Page 205)
Try It 10 (Page 205)
Try It 11 (Page 205)
Try It 12 (Page 205)
13
arrow_right Self-Assessment for Concept & Skills p.206
Self-Assessment for Concept & Skills 14 (Page 206)
Self-Assessment for Concept & Skills 15 (Page 206)
Self-Assessment for Concept & Skills 16 (Page 206)
17
arrow_right Self-Assessment for Problem Solving p.207
18
19
arrow_right Review & Refresh p.208
Review & Refresh 1 (Page 208)
Review & Refresh 2 (Page 208)
Review & Refresh 3 (Page 208)
Review & Refresh 4 (Page 208)
Review & Refresh 5 (Page 208)
Review & Refresh 6 (Page 208)
Review & Refresh 7 (Page 208)
arrow_right Concept, Skills, & Problem Solving p.208-210
8
Concept, Skills, & Problem Solving 9 (Page 208)
Concept, Skills, & Problem Solving 10 (Page 208)
Concept, Skills, & Problem Solving 11 (Page 208)
Concept, Skills, & Problem Solving 12 (Page 208)
Concept, Skills, & Problem Solving 13 (Page 208)
Concept, Skills, & Problem Solving 14 (Page 208)
Concept, Skills, & Problem Solving 15 (Page 208)
Concept, Skills, & Problem Solving 16 (Page 208)
Concept, Skills, & Problem Solving 17 (Page 208)
Concept, Skills, & Problem Solving 18 (Page 208)
Concept, Skills, & Problem Solving 19 (Page 208)
Concept, Skills, & Problem Solving 20 (Page 208)
Concept, Skills, & Problem Solving 21 (Page 208)
Concept, Skills, & Problem Solving 22 (Page 208)
Concept, Skills, & Problem Solving 23 (Page 208)
Concept, Skills, & Problem Solving 24 (Page 208)
Concept, Skills, & Problem Solving 25 (Page 208)
Concept, Skills, & Problem Solving 26 (Page 208)
Concept, Skills, & Problem Solving 27 (Page 208)
28
29
30
Concept, Skills, & Problem Solving 31 (Page 209)
Concept, Skills, & Problem Solving 32 (Page 209)
Concept, Skills, & Problem Solving 33 (Page 209)
Concept, Skills, & Problem Solving 34 (Page 209)
Concept, Skills, & Problem Solving 35 (Page 209)
Concept, Skills, & Problem Solving 36 (Page 209)
Concept, Skills, & Problem Solving 37 (Page 209)
Concept, Skills, & Problem Solving 38 (Page 209)
Concept, Skills, & Problem Solving 39 (Page 209)
40
41
42
43
44
45
46
47
48
49
Concept, Skills, & Problem Solving 50 (Page 210)
Concept, Skills, & Problem Solving 51 (Page 210)
Concept, Skills, & Problem Solving 52 (Page 210)
Concept, Skills, & Problem Solving 53 (Page 210)
Concept, Skills, & Problem Solving 54 (Page 210)
55
56
57