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Katena32 [7]
3 years ago
15

Explain how you could use a number line to show that -4+3 and 3+(-4) have the same value.which property of addition states that

these sums are equivalent

Mathematics
1 answer:
Anna007 [38]3 years ago
8 0
For -4+3,
1. start with zero
2. move to left (-x axis) for 4 units (-4)
3. then move to right (+x axis) for 3 units (+3)

For 3+(-4)
1. Start with zero
2. Move the point to right side by 3 units (+3)
3. then move the point to the left by 4 units (-4)

For both you'll stop at -1.

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George traveled 300 miles in 8 hours. How far could he travel in 4 hours if he traveled at the same rate?
Amiraneli [1.4K]
Divide 300 by 8 to find the unit rate
300/8= 37.5

He travels 37.5 miles per hour

If he travels 37.5 miles per hour, to find the amount in 4 hours we would do 37.5 times 4


37.5×4=150


In 4 hours he travels 150 miles
8 0
2 years ago
Read 2 more answers
Solve the equation m2 + 6m = –4 using the quadratic formula. A. m = –3±√ 5 B. m = 5±√ 3 C. m = 3±√ 5 D. m = –5±√ 3
USPshnik [31]

Answer:  m = –3±√ 5

m=

−b±√b2−4ac

2a

m=

−(6)±√(6)2−4(1)(4)

2(1)

m=

−6±√20

2

m=−3+√5 or m=−3−√5

7 0
2 years ago
Solve each system of equations by substitution <br> Y=4x+13 y=6x+19
rosijanka [135]

Answer:

I believe the answer to this question is: (-3,1) X=-3, Y=1.

6 0
2 years ago
In a particular class, exams are worth 50% of the overall grade, quizzes are worth 30% of the overall grade, homework is worth 1
Paha777 [63]

Answer:

The student's overall grade is 85.79%

Step-by-step explanation:

Given in the question that:

Exam = 50%; Quiz = 30%, Home work = 15% and Class participation = 5%

The total giving us 100%.

A particular student scored the following;

87.9% on exams, 77.8% quiz, 90% Home work and 100%  on class participation

Calculating the percentages the student had for each;

Exam total = 50*0.879 = 43.95% earned

Quiz = 30*0.778 = 23.34% earned

Home work = 15*0.9 = 13.5% earned

Class participation = 5*1 = 5% earned

Total earned = 43.95+ 23.34 + 13.5+ 5 = 85.79%

3 0
3 years ago
A merchant buys a television for $125 and sells it for $75 more. what is the percent of markup?
guajiro [1.7K]
Since he sold it for $75 more,

% Mark Up = Mark Up/ Cost Price   * 100%

% Mark Up =   75 / 125 * 100%
            
                   =   0.6  * 100% = 60%

Percent Mark Up = 60%.

Hope this explains it.

4 0
2 years ago
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