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3 years ago

15

help me please, I'm very confused no matter what answers I pick for some reason they still say they are wrong. I just can't seem

to understand this

1 answer:

vesna_86 [32]3 years ago

3 0

Answer:

10,000,000

Step-by-step explanation:

10^6 is 10,000,000

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What is the domain of f(x) = 2|x − 1| + 3? A. {x | x ≥ 3} B. {x | x < 1} C. {x | x ≤ -1} D. {x | x = all real numbers}

arlik [135]

Answer:

all real numbers

Step-by-step explanation:

f(x) = 2|x − 1| + 3

The domain is what values can we put in for x

There is no limit to what we can put in for x

therefore the domain is all real numbers

8 0

4 years ago

Find the slope of the graph of the relation y^3 − xy = −6 at the point (7, 2).

mezya [45]

Yay, implicit differnentiation

when you take the derivitive of y, you multiply it by dy/dx
example
dy/dx y^2=2y dy/dx

for x, the dy/dx dissapears

ok
so differnetiate and solve for dy/dx

3y² dy/dx-(y+x dy/dx)=0
expand
3y² dy/dx-y-x dy/dx=0
3y² dy/dx-x dy/dx=y
dy/dx (3y²-x)=y
dy/dx=y/(3y²-x)

so at (7,2)
x=7 and y=2
dy/dx=2/(3(2)²-7)
dy/dx=2/(3(4)-7)
dy/dx=2/(12-7)
dy/dx=2/5

answer is 2/5

5 0

4 years ago

Based on the output when testing to see if the population mean heart rate of UK students is not equal to 80, identify the follow

AleksAgata [21]

Answer:

Step-by-step explanation:

a) $H_o: mu =80\\H_a: mu not equals 80\\$

b) Sample mean is the average of sample

c) std deviation of the sample

d) std dev/sq rt n

e) (sample mean - mu)/std error

f) p value = prob with test statistic

g) If p < alpha, reject H0.

h) If rejected, there is evidence that significant difference between population mean and sample mean.

8 0

3 years ago

Simplify: 3 + 2(8n + 4) + 9n please show how you got your answer

nevsk [136]

3 + 2(8n + 4) + 9n
Distribute the 2
3 + 16n + 8 + 9n
Combine like terms
Your final answer is 11 + 25n

3 0

3 years ago

The braking distance Dv (in meters) for a certain car moving at velocity v (in meters/second) is given by =Dvv234.

MaRussiya [10]

Answer:

S(t)= $\frac{9t^2}{34}$

Step-by-step explanation:

We are given that

Th braking distance for a certain car moving at velocity v(in m/s) is given by

$D(v)=\frac{v^2}{34}$

The velocity of car B(t) t seconds after starting = $B(t)=3t$

We have to find the value for braking distance S(t) after t seconds.

To find the formula for braking distance we will substitute the value of velocity B(t) in place of v in D(v)

Substitute the value of velocity then we get

Then, we get

The formula for the braking distance S(t) after t seconds= $\frac{(3t)^2}{34}$

The formula for the braking distance S(t) after t seconds= $\frac{9t^2}{34}$

8 0

3 years ago