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BlackZzzverrR [31]
2 years ago
15

Can anyone help I don't understand much of this

Mathematics
2 answers:
GarryVolchara [31]2 years ago
6 0

Answer:

x=0

g=6

Step-by-step explanation:

katovenus [111]2 years ago
4 0
G=6
you want to move the variable to the left side and change its sign so the equation should now be 3.4g-1.4g+7=19, then you want to collect the like terms which now you should be left with 2g=19-7, which then turns into 2g=12, finally you want to divide both sides of the equation by 2, so then you are left with g=6.
for the second question x= 0
you want to cancel equal terms,then collect the like terms -3x=5x-10x, then move variable to the left 3x=-5x, collect like terms again -3x+5x=0, divided both sides by 2 so 2x=0, and then you’re left with 0=x
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Nathan just bought a car. He models the value, V, in dollars, of the car after t years as V(t)=21,000(0.861)^t. Based on this mo
Snezhnost [94]

Answer:

Value of the car is decreasing by 13.9% each year.

Step-by-step explanation:

This equation tells us V(t) is the value of the car after a certain time in years, $21,000 is the initial value of the car.  What we need to focus on is on the 0.861 part of this equation.  This means that the price of the car is worth 0.861 or 86.1% of what it was worth the year prior, this means that the price of the car is decreasing over time.  By how much is it decreasing? Well if we consider 1 to mean 100% (since 100 / 100 =1) then we have 100%-86.1%=13.9%.  This means that the value of the car is decreasing 13.9% each year.

6 0
2 years ago
Helen got a $7 reduction in the price of a pair of jeans that are normally $32. What is the approximate percent decrease in the
Mila [183]
I believe it is 21% decrease sorry if it’s not
6 0
3 years ago
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Answer:

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Step-by-step explanation:

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A study was conducted to compare the proportion of drivers in Boston and New York who wore seat belts while driving. Data were c
allochka39001 [22]

Answer:

a) The test statistic is z = -2.51

b) The pvalue is 0.0060.

Step-by-step explanation:

Question a:

Ha: pB < pNY

This means that the alternate hypothesis is rewritten as:

H_a: p_{B} - p_{NY} < 0

While the null hypothesis is:

H_0: p_{B} - p_{NY} = 0

The test statistic is:

z = \frac{X - \mu}{s}

In which X is the sample mean, \mu is the value tested at the null hypothesis and s is the standard error

pB = 0.581, pNY = 0.832

This means that X = 0.581 - 0.832 = -0.251

0 is tested at the null hypothesis:

This means that \mu = 0

Standard error = 0.1

This means that s = 0.1

Test statistic:

z = \frac{X - \mu}{s}

z = \frac{-0.251 - 0}{0.1}

z = -2.51

The test statistic is z = -2.51

Question b:

The pvalue is the probability of finding a proportion less than -0.251, that is, a difference of at least 0.251, which is the pvalue of Z = -2.51.

Looking at the z-table, Z = -2.51 has a pvalue of 0.0060

The pvalue is 0.0060.

5 0
3 years ago
initial population of a town is 3400 and it grows with a doubling time of 10 years what will the population be in 8 years
Talja [164]
So in 10 years, the population will double.

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If you consider 10 years to be 100% of the doubling time, 8 years is 80%.

And 80 as a decimal is 80/100 = 0.8

So the answer is 0.8 * 6800, simplify.
6 0
3 years ago
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