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allochka39001 [22]
3 years ago
13

(

Mathematics
2 answers:
ankoles [38]3 years ago
8 0
A. A number line with an open circle on -4, shading to the left, and a closed circle on 3, shading to the right
jeka57 [31]3 years ago
8 0

we have the compound inequality

x-3 < -7 --------> inequality A

x < -7+3

x < -4

The solution inequality A is the interval-------> (-∞,-4)

A number line with an open circle on -4, shading to the left

x+5 \geq 8 --------> inequality B

x \geq 8-5

x \geq 3

The solution inequality B is the interval--------> [3,∞)

A number line with a closed circle on 3, shading to the right

so

The solution inequality A or inequality B is equal to  

Solution A +Solution B=(-∞,-4) + [3,∞)

therefore

<u>the answer is the option A</u>

A number line with an open circle on −4, shading to the left, and a closed circle on 3, shading to the right

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In a shipment of 22 smartphones, 2 are defective. How many ways can a quality control inspector randomly test 4 smartphones, of
Eddi Din [679]

Answer:

Therefore the required ways are =190

Step-by-step explanation:

Combination: Combination is the number of selection of items from a collection of items where the order of selection does not matter.

Total number of smartphones =22

Defective phone = 2

Non defective phone = (22-2) =20

The control inspector randomly test 4 smartphones of which 2 are defective.

Non defective phone = 2

The ways to select 2 non defective phone is

^{20}C_2=\frac{20!}{2!(20-2)!} =\frac{20!}{2!18!}=\frac{19\times 20}{2} =190

The ways to select 2 defective phone is= ^2C_2=1

Therefore the required ways are = (190×1) =190

5 0
4 years ago
Suppose that you want to test the effects of different dishwashing detergents on dishes that have food stuck to them. To test th
Inga [223]

the dependent variable, as its name says it depends on the other variable

and the independent variable is the one that we can control or vary

the independent variable is the detergent because it is what we change or vary

and the dependent variable is the effect of the detergent since that is what we get

6 0
1 year ago
I need help with the answer
solmaris [256]

Answer:

Its the last option

y = 1488.33x + 23800 ; $172,600.

Step-by-step explanation:

The slope of the trend line = (median value for 2000 - median value for 1940) / 60

= 89300 / 60

= 1488.33.

So the equation is 1488.33x + 23,800

Estimate for 2040

is 1483.33* 100 + 23800

= 172,600.

5 0
3 years ago
In order for the data in the table to represent a linear function with a rate of change of –8, what must be the value of m? m =
pogonyaev
19 because it's being subtracted by 8
4 0
3 years ago
Read 2 more answers
What is the slope of the line that passes through the points (2,7) and (8,-5)
Nookie1986 [14]

Answer:

m = -12 / 6 = -2 / 1 = -2

So its -2

3 0
3 years ago
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