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zvonat [6]
3 years ago
10

CALLING EXPERTS!!! PLEASE HELP

Mathematics
2 answers:
disa [49]3 years ago
6 0
The circle is open if the inequality is greater than (>) or less than (<) and closed if the inequality is greater than or equal to (≥) or less than or equal to (≤)
If the arrow points to the right (—>) towards bigger numbers, x (whatever number is on the line) will be GREATER (> or ≥)
If the arrow o points to the left (<—) towards smaller numbers, x will be LESSER (< or ≤)

1. Starts at -2 with a closed circle and goes in the positive direction —>
So x ≥ -2
2. Starts at 2 with an open circle and goes in the negative direction <—
So x<2

And the rest use the same method.
mestny [16]3 years ago
6 0

Answer:

Green answers in order of 1-7 as green appears

Just show the ones at start of each answer in bold

1)  x  ≥ -2    closed circle start   opp/s   x ≤ 0  closed circle stop

2) x < -2    open circle stops    opp/s   x ≥ 0  closed circle start

3) x > 2      open circle starts    opp/s   x ≤ 0  closed circle stops

4) x ≤ 2     closed circle stops  opp/s   x ≥ 0 closed circle starts

5) x < 2        open circle stops   opp/s  x ≥-6  closed circle starts  

6) x > 2      open circle starts   opp/s   x ≤ 6  closed circle stops  

7)  x < -2     open circle stops   opp/s   x ≥ -6  closed circle starts  

Step-by-step explanation:

Rule 1   closed circle is   ≥  right   open circle shows > right

Rule 2  closed circle is   ≤ left   open circle shows < left

Rule 3  with inequalities on line   x > 2 means it starts from this value and moves right.

Rule 4 with inequalities on line  x < 2 means it ends in this value.

Rule 5   Remember rule 3 and rule 4  for direction start and stop

remember rule 1+ rule 2 for choice of closed circle etc.

You might be interested in
Evaluate -a - 12a 2 for a = -1
Serhud [2]
The answer is -11
You put "-1" in place of all the "a"s and get 
-(-1) - 12(-1)^2
-(-1) is just 1, and (-1)^2 is "1"
We are then left with 1-12(1) which is 1-12 which is -11
6 0
3 years ago
F(x) = 3x² + 9x – 16<br> Find f(-8)
Nezavi [6.7K]

Answer: 104

Step-by-step explanation:

f(-8) represents f(x) evaluated at x=-8.

f(-8)=3(-8)^2 +9(-8)-16\\\\=192-72-16\\\\=120-16\\\\=104

7 0
1 year ago
(pls help quick and explain how you got the answers for brainliest)
scoray [572]

You only have to apply the theorem of Pythagoras here. Remember the square on the hypotenuse (the longest side) is equal to the sum of the squares on the other two sides :

1. AB is the hypotenuse, so, according to the theorem we can write :

AB² = AC² + CB²

c² = 5² + 4²

c²= 25 + 16

c² = 41

applying the square root of 41 we get :

c ≈ 6.40 rounded to the hundred

The next cases are exactly the same thing so there is no need for explanation :

2.

AB is the hypotenuse here because it is the biggest side clearl :

AB² = AC² + CB²

25² = 15² + b²

Thus

b² = 25² - 15²

we just subtracted 15² on each side of the equation

b² = 625 - 225

b² = 400

applying the square root of 400 we get

b = √400 = 20

So AC = 20

3. The longest side is clearly AB = 60

So

AB² = AC² + CB²

60² = 40² + a²

subtracting 40² on each side of the equation we get :

a² = 60² - 40²

I let you finish this using your calculator and doing exactly like the previous cases

4.

AB is the hypotenuse,

AB² = AC² + CB²

23² = b² + 14²

Subtracting 14² from each side of the equation we get

b² = 23² - 14²

5.

AB is the biggest side :

AB² = AC² + CB²

29² = 23² + a²

We subtract 23² on each sides of the equation :

a² = 29² - 23²

You can finish with your calculator

6.

AB² = AC² + BC²

78² = b² + 30²

subtraction...

b² = 78² - 30²

Good luck :)

7 0
3 years ago
K-17=-12 I need help solveing this
Fed [463]
Remember, you can do ANYTHING to an equaiton as long as you do it to BOTH SIDES

we can try to get k by itself bymaking that -17 into 0 since k+0=k

-17+17=0 right so

K-17=-12
add 17 to BOTH SIDES
K+17-17=17-12
K+0=5
K=5
5 0
3 years ago
Read 2 more answers
√72 what is the non-perfect simplefied square root radical
Lostsunrise [7]

For simplifying radicals, remember the product rule of radicals: √ab = √a x √b . This radical is simplified as such:

√72 = √9 x √8 = 3 x √4 x √2 = 3 x 2 x √2 = 6√2

In short, the simplified radical of √72 is 6√2.

5 0
3 years ago
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