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oksano4ka [1.4K]
3 years ago
9

Solve and graph the absolute value inequality: |2x + 4| > 8. number line with open circles on negative 6 and 2, shading in be

tween. number line with closed circles on negative 6 and 2, shading going in the opposite directions. number line with open circles on negative 6 and 2, shading going in the opposite directions. number line with open circles on negative 2 and 2, shading going in the opposite directions.
Mathematics
1 answer:
Klio2033 [76]3 years ago
6 0
|2x+4| > 8 breaks down into two inequalities: 2x+4 > 8 or 2x+4 < -8

Solving <span> 2x+4 > 8 leads to...
</span><span>2x+4 > 8
</span><span>2x+4-4 > 8-4
</span>2x > 4
2x/2 > 4/2
x > 2

Solving <span>2x+4 < -8 leads to...
</span><span>2x+4 < -8
</span><span>2x+4-4 < -8-4
</span>2x < -12
2x/2 < -12/2
x < -6

So either x > 2 or x < -6

You'll have 2 open circles at 2 and -6 on the number line. The shaded region will be the region to the left of -6 and to the right of 2. Basically everything but in between -6 and 2
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To me it looks like B

Step-by-step explanation:

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3 years ago
how many 4 digit numbers n have the property that the 3 digit number obtained by removing the leftmost digit is one ninth of n
Tom [10]

Answer:

  7

Step-by-step explanation:

We want to find the number 4-digit of positive integers n such that removing the thousands digit divides the number by 9.

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Let the thousands digit be 'd'. Then we want to find the integer solutions to ...

  n -1000d = n/9

  n -n/9 = 1000d . . . . . . add 1000d -n/9

  8n = 9000d . . . . . . . . multiply by 9

  n = 1125d . . . . . . . . . divide by 8

The values of d that will give a suitable 4-digit value of n are 1 through 7.

When d=8, n is 9000. Removing the 9 gives 0, not 1000.

When d=9, n is 10125, not a 4-digit number.

There are 7 4-digit numbers such that removing the thousands digit gives 1/9 of the number.

8 0
2 years ago
Marco needs $57 to buy new basketball shoes. If Marco earns $3 per day working and already has $12 saved, which equation shows h
Montano1993 [528]

Answer:

57=12+3d

d=number of days worked

6 0
3 years ago
Read 2 more answers
Dwayne wanted to open a checking account but the bank required him to have a minimum of $100 to open the account. Do I needed to
ANEK [815]

Answer:

$80

Step-by-step explanation:

If $100 is 25% more than Dwayne's original amount (a), you have ...

a + 0.25a = 100

1.25a = 100

a = 100/1.25 = 80

Dwayne originally had $80.

7 0
3 years ago
∆ABC has side lengths of 10 units, 20 units, and 24 units. ∆XYZ is similar to ∆ABC, and the length of its longest side is 60 uni
creativ13 [48]
Let the longest side of ΔABC is c = 24 and the longest side of ΔXYZ is z = 60
The ratio of any pair of corresponding sides of these triangles is the same:
z/c = 60/24 = 2.5
x = 10 · 2.5 = 25
y = 20 · 2.5 = 50 
The perimeter of ΔXYZ :  25 + 50 + 60 = 135 units
hc = 8
hz = 8 · 2.5  = 20
The area of ΔXYZ :  60 · 20 / 2 = 600 square units
6 0
3 years ago
Read 2 more answers
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