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3 years ago

INEED HELP ASAP I WILL GIVE 50 PIONT

Mathematics

2 answers:

Molodets [167]3 years ago

7 0

Answer:

I thinks its number 2 hope this helps!

Step-by-step explanation:

vekshin13 years ago

4 0

Answer:

it is B

Step-by-step explanation:

because it has to equal 180 degrees

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To eliminate the x terms and solve for y in the fewest steps, by which constants should the equations be multiplied by before ad

aliya0001 [1]

Answer:

See below.

Step-by-step explanation:

Here is an example:-

Solve by elimination:

2x - 3y = 0

3x + 2y = 13

To eliminate the y terms Multiply the first equation by 2 and the second by 3. This gives:

4x - 6y = 0

9x + 6y = 39 Adding the 2 equations:

13x + 0 = 39

13x = 39

x = 39/13 = 3

Finally we find y by plugging x = 3 into the first equation:

2(3) - 3y = 0

3y = 2(3) = 6

y = 2.

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2 years ago

Solve the 2-step equation: -3/4+8=-7

TiliK225 [7]

Answer: there is no awnser

Step-by-step explanation: because u can’t divide 7.25 and 7

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3 years ago

If each interior angle of a regular polygon measures 144 degrees, how many sides does the polygon have?

LuckyWell [14K]

180(n-2)=n*144 in our casesolving for n we obtain:36n = 360n=10 sidesCHECK!!!!!!!!!!!!!!!!!!!

4 0

4 years ago

Please help! Brainliest answer gets 10 points! what is x^2+x^4?

Rainbow [258]

Answer:

Step-by-step explanation:

You cannot add these because they are not like. IF you have a value for x, then the expression could be evaluated at the x value, but you can't add them.

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4 years ago

In its Fuel Economy Guide for 2014 model vehicles, the Environmental Protection Agency gives data on 1160 vehicles. There are a

Ivahew [28]

Answer:

$Q_1=18.69\\Q_2=22.2\\Q_3=25.7$

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 22.2 miles per gallon

Standard Deviation, σ = 5.2 mpg

We are given that the distribution of gas mileage is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

First Quartile(Cumulative proportion 0.25)

We have to find the value of x such that the probability is 0.25

P(X < x)

$=P( z \leq \displaystyle\frac{x - 22.}{5.2})=0.25$

Calculation the value from standard normal z table, we have,

$P(z$

$\displaystyle\frac{x - 22.2}{5.2} = -0.674\\\\x = 18.69$

$Q_1 = 18.69$

Second Quartile(Cumulative proportion 0.5)

We have to find the value of x such that the probability is 0.5

P(X < x)

$=P( z \leq \displaystyle\frac{x - 22.}{5.2})=0.5$

Calculation the value from standard normal z table, we have,

$P(z$

$\displaystyle\frac{x - 22.2}{5.2} = 0.0\\\\x = 22.2$

$Q_2 = 22.2$

Third Quartile(Cumulative proportion 0.75)

We have to find the value of x such that the probability is 0.75

P(X < x)

$=P( z \leq \displaystyle\frac{x - 22.}{5.2})=0.75$

Calculation the value from standard normal z table, we have,

$P(z$

$\displaystyle\frac{x - 22.2}{5.2} = 0.674\\\\x = 25.70$

$Q_3 = 25.70$

Inter-quartile range:

$Q_3-Q_1=25.70-22.2 = 3.5$

3 0

3 years ago