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Snowcat [4.5K]
3 years ago
13

4. Solve for x please help!!

Mathematics
2 answers:
kari74 [83]3 years ago
5 0

Answer:

- 3x = 15 \\  \frac{ - 3x}{ - 3} =  \frac{15}{ - 3}   \\ x =  - 5

Luden [163]3 years ago
3 0

Answer:

x = -5

Step-by-step explanation:

Isolate the variable x:

-3x = 15

Since x is being multiplied by -3, we must find a way to cancel it out. To cancel -3 being multipled, divide by -3 instead. Remember, whatever we do to one side of the equation, we must do to the other!

-3x ÷ -3 = 15 ÷ -3

1x = -5

x = -5

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In a simple random sample of 1000 Americans, it was found that 61% were satisfied with the service provided by the dealer from w
BlackZzzverrR [31]

Answer:

c. smaller for the sample of Canadians, since the percentage satisfied was smaller than that for the Americans.

Correct we see that the proportion of Canadians is lower than the proportion of Americans since 0.58<0.61. And the reason why is by the percentage.

Step-by-step explanation:

Data given and notation    

X_{A}=610 represent the number of people of America satisfied

X_{C}=580 represent the number of people of Canada satisfied

n_{A}=1000 sample of Americans selected  

n_{C}=1000 sample of Canadians selected  

p_{A}=\frac{610}{1000}=0.61 represent the proportion of American people satisifed

p_{C}=\frac{580}{1000}=0.58 represent the proportion of Canadians satisfied

\hat p represent the pooled estimate of p

Solution to the problem

If we analyze one by one the optiosn we have this:

a. larger for the Canadians because the sample size is smaller.

False, both have the same the same sample size of 1000 and the proportion of Canadians is less than the proportion of Americans.

b. smaller for the sample of Canadians, since the population of Canada is less than half that of the United States. Hence, the sample is a larger proportion of the population.

False, the proportion of Canada is not less than half of the United States since the difference is just 0.61-0.58=0.03

c. smaller for the sample of Canadians, since the percentage satisfied was smaller than that for the Americans.

Correct we see that the proportion of Canadians is lower than the proportion of Americans since 0.58<0.61. And the reason why is by the percentage.

d. larger for the Canadians, since Canadian citizens are more widely dispersed throughout their country than American citizens are in the United States. Hence, Canadians have more variable views.

False the porportion of Canadians 0.58 is NOT higher than the proportion of Americans satisfied 0.61 since 0.58 is not less than 0.61.

5 0
3 years ago
Read 2 more answers
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Fiesta28 [93]
7 inches by 3/4 has a larger area
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3 apples cost $1.26 how much do 10 apples cost
natita [175]

1.26/3 = 0.42 each apple


So now 0.42 × 10 apples = $4.20

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makkiz [27]
X is greater than or equal to 21
4 0
3 years ago
ANSWER NEEDED
MA_775_DIABLO [31]

Answer:

2\pi\ seconds=6.28\ seconds

Step-by-step explanation:

<u>Trigonometric Functions</u>

The trigonometric functions have a cyclic behavior, which means they perform a full cycle and then do it all again in their whole domain. If we know that

sinx=0

we can use the inverse sine function to know the values of x. In this case, all angles whose sine is 0.

X=0 is the trivial solution, but given the repetitive nature of the sine, we know the next cycle will repeat the same value. Each cycle occurs every 2\pi units of x, so the solution is

x=0+2k\pi

being k any integer number, positive or negative

The height of the tip of the blade (in feet) of our windmill has a motion described by the equation

h(x)=-14sinx+18

Let's start one cycle by setting x=0, so the initial value of h is

h(0)=-14(0)+18=18

The very next cycle will be when h=18 again

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Or

sinx=0

Which next solution is

x=2\pi

So, it will take to make a full rotation for one blade a time of

2\pi\ seconds=6.28\ seconds

7 0
4 years ago
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