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levacccp [35]
2 years ago
12

If a sample of 40 cars is selected, estimate the number of cars traveling faster than 70 mph.

Mathematics
2 answers:
dimulka [17.4K]2 years ago
6 0

Answer:

Im pretty sure is is 20 or something like that

Step-by-step explanation:

Umnica [9.8K]2 years ago
5 0

Answer:

20ish

Step-by-step explanation:

I would need more info abt the question to answer it more exactly

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Solve the expression 3a+5 when a=6
Svetllana [295]

Answer:

23

Step-by-step explanation:

3a+5

3(6)+5

18+5

23

8 0
2 years ago
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A teacher can grade 25 papers in 4 hours. How many papers can he grade in 6 hours?
lianna [129]
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Find the solution set of this inequality|10x+20| ≤10
Pavlova-9 [17]

Answer:

solution is

[-3,-1]

Step-by-step explanation:

we are given

|10x+20|\leq 10

Firstly, we will find critical values

so, let's assume it is equal

|10x+20|= 10

now, we can break absolute sign

For |10x+20|= -(10x+20):

-(10x+20)= 10

we can solve for x

-10x-20= 10

Add both sides by 20

-10x-20+20= 10+20

-10x= 30

Divide both sides by -10

and we get

x=-3

For |10x+20|= (10x+20):

(10x+20)= 10

we can solve for x

10x+20= 10

Subtract both sides by 20

10x+20-20= 10-20

10x= -10

Divide both sides by 10

and we get

x=-1

so, critical values are

x=-3

x=-1

now, we can draw a number line and locate these values

and then we can check inequality on each intervals

For (-\infty,-3):

We can select any random value from this interval and plug that in inequality

and we get

we can plug x=-5

|10\times -5+20|\leq 10

|-50+20|\leq 10

30\leq 10

so, this is FALSE

For [-3,-1]:

We can select any random value from this interval and plug that in inequality

and we get

we can plug x=-2

|10\times -2+20|\leq 10

|-20+20|\leq 10

0\leq 10

so, this is TRUE

For (-1,\infty):

We can select any random value from this interval and plug that in inequality

and we get

we can plug x=0

|10\times 0+20|\leq 10

|0+20|\leq 10

20\leq 10

so, this is FALSE

so, solution is

[-3,-1]

7 0
3 years ago
A composite figure is made up of one simple figure.<br> True or<br> False
xxTIMURxx [149]

Answer:

False

Step-by-step explanation:

A composite figure would be any irregular shapes and can be made up of multiple shapes

7 0
3 years ago
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Tcecarenko [31]

Answer:

C26 is also a Category of EAD (Employment Authorization Document) provided to immigrant workers in U.S. These are dependents of H1b visa holders commonly referred to as H4-EAD.

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