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3 years ago

Can someone plz help me

Mathematics

1 answer:

Colt1911 [192]3 years ago

4 0

Answer:

x is less than or equal to negative 14.

Step-by-step explanation:

so for now we should pretend that the greater than or equal to is an equal sign, and simplify the problem to get x alone on a side

remove 5 from each side

-x/3=1/3-5

-x/3=14/3

multiply both sides by 3

-x=14

x=-14

so we can now replace the equal sign with the equal or greater to, so x is less than or equal to -14

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The U.S. Energy Information Administration (US EIA) reported that the average price for a gallon of regular gasoline is $3.94 (U

tekilochka [14]

Answer:

a) 25

b) 49

c) 97

Step-by-step explanation:

The sample size is calculated using the formula, n = $(\frac{\sigma\times z}{\textup{Margin of error}})^2$

Now,

for 95% confidence level value of z-factor = 1.96

Given:

Mean = $3.94

standard deviation = $0.25

thus,

a) for margin of error = $0.10

n = $(\frac{\sigma\times z}{\textup{Margin of error}})^2$

n = $(\frac{0.25\times1.96}{\textup{0.10}})^2$

n = 4.9²

n = 24.01 ≈ 25 (Rounded off to next integer)

b) for margin of error = $0.07

n = $(\frac{\sigma\times z}{\textup{Margin of error}})^2$

n = $(\frac{0.25\times1.96}{\textup{0.07}})^2$

n = 7²

n = 49

c) for margin of error = $0.05

n = $(\frac{\sigma\times z}{\textup{Margin of error}})^2$

n = $(\frac{0.25\times1.96}{\textup{0.05}})^2$

n = 9.8²

n = 96.04 ≈ 97 (Rounded off to next integer)

6 0

4 years ago

PLEASE HELP

Ilya [14]

In y=mx+b, m= slope and b= y-intercept. All you have to do is substitute.

1) $y= \frac{3}{2} x-2$

2) $
y= \frac{-1}{2}x-1$

3) $y=-0.5x+2.5$

3 0

3 years ago

A sports competition was held in London and Paris. The prize money in London was £140 000 and the prize money in Paris was €1600

riadik2000 [5.3K]

160,000 divided by 1.15 = around 139,000 so London had the higher pay out

4 0

3 years ago

PLEASE HELP!

Citrus2011 [14]

Answer:

x - 3y - 7 = 0

Step-by-step explanation:

We can first write this equation in Point Slope form, and then rearrange it to general form.

Note: the given point is (h,k)

Slope is m.

The equation is:

y-k=m(x-h)

Therefore, the equation in point slope form would be:

y+2=1/3(x-1)

Now, we can change that to general form.

y+2=1/3x-1/3

1/3x-1/3-y-2=0

1/3x-y-2 1/3=0

Multiply everything by 3.

x-3y-7=0

Therefore, the corrrect answer is option 3.

5 0

3 years ago

Given the function y = 4x - 2, what is the value of y when x = 2 ?

jek_recluse [69]

Answer:

i think it's a

Step-by-step explanation:

4 0

3 years ago