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KengaRu [80]
3 years ago
11

John says that if one side of an inequality is 0, you don't have to reverse the inequality symbol when you multiply or divide bo

th sides by a negative number. Complete the example that disproves John's statement.
If you divide both sides of −3z ≥ 0 by −3, you get z ≥

Can anyone help ? :)
Mathematics
2 answers:
Jobisdone [24]3 years ago
6 0
It doesn't matter if there is 0, you still flip the inequality symbol.
-3z <span>≥ 0
z </span>≤ 0
Law Incorporation [45]3 years ago
6 0
^agreed . The 0 does not matter what so ever and yes be sure to always flip the inequality!
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Order the numbers from the least to greatest<br><br>19/6, 47/14, 83/2<br>Thx!
ElenaW [278]

I would change the fractions to decimals so that I could see least to greatest.

19/6=3.17

47/14=3.36

83/2=41.5

Least to greatest:

19/6, 47/14, 83/2

7 0
3 years ago
How do you solve this? r^2+32=12r
Andre45 [30]

Answer:

r = {-8, -4}

Step-by-step explanation:

Simplifying

r2 = -32 + -12r

Solving

r2 = -32 + -12r

Solving for variable 'r'.

Reorder the terms:

32 + 12r + r2 = -32 + -12r + 32 + 12r

Reorder the terms:

32 + 12r + r2 = -32 + 32 + -12r + 12r

Combine like terms: -32 + 32 = 0

32 + 12r + r2 = 0 + -12r + 12r

32 + 12r + r2 = -12r + 12r

Combine like terms: -12r + 12r = 0

32 + 12r + r2 = 0

Factor a trinomial.

(8 + r)(4 + r) = 0

Subproblem 1

Set the factor '(8 + r)' equal to zero and attempt to solve:

Simplifying

8 + r = 0

Solving

8 + r = 0

Move all terms containing r to the left, all other terms to the right.

Add '-8' to each side of the equation.

8 + -8 + r = 0 + -8

Combine like terms: 8 + -8 = 0

0 + r = 0 + -8

r = 0 + -8

Combine like terms: 0 + -8 = -8

r = -8

Simplifying

r = -8

Subproblem 2

Set the factor '(4 + r)' equal to zero and attempt to solve:

Simplifying

4 + r = 0

Solving

4 + r = 0

Move all terms containing r to the left, all other terms to the right.

Add '-4' to each side of the equation.

4 + -4 + r = 0 + -4

Combine like terms: 4 + -4 = 0

0 + r = 0 + -4

r = 0 + -4

Combine like terms: 0 + -4 = -4

r = -4

Simplifying

r = -4

Solution

r = {-8, -4}

3 0
2 years ago
During the day,Sam spent $4.85 on lunch.he also bought 2 books for $7.95 each. At the end of the day we had $8.20 left how much
Vlada [557]
20.75 because if you add 4.85+7.95+7.95 add that you get 20.75

7 0
3 years ago
salma is saving money to buy a gamefar she has saved 16which is one-fourth of the total cost of the gameHow much does the game c
Arturiano [62]

Answer:

64

Step-by-step explanation:

if she has 16$ and that's only 1/4 of the money to get that game you wanna multiply 16x4

16x4= 64

4 0
2 years ago
X=a-2by(2) make y the subject
sladkih [1.3K]

Answer:

y = √{(a - x)/2b}

Step-by-step explanation:

x=a-2by²

2by² = a - x

divide through by 2b

y² = (a - x)/2b

y = √{(a - x)/2b}

3 0
3 years ago
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