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3 years ago

Help guys and gals 10 points!!!!!

Mathematics

2 answers:

olga_2 [115]3 years ago

4 0

2x + y = 7

y = -2x + 7 where slope m = -2 and b= y intercept = 7

Answer is C

slope : -2 and y intercept = 7

kompoz [17]3 years ago

3 0

Answer:

The correct answer is C

Step-by-step explanation:

In order to find the answer to this question, you first must solve for y.

2x + y = 7 ----> Subtract 2x

y = -2x + 7

Now we can identify the slope as -2 due to the fact that it is the coefficient of x. We can also identify the intercept as 7, due to it being the constant at the end of the equation.

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The burning time of a very large candle is normally distributed with mean of 2500 hours and standard deviation of 20 hours. Find

dezoksy [38]

Answer: C.-1.5

Step-by-step explanation:

Given: The burning time of a very large candle is normally distributed with mean $(\mu)$ of 2500 hours and standard deviation $(\sigma)$ of 20 hours.

Let X be a random variable that represent the burning time of a very large candle.

Formula: $Z=\dfrac{X-\mu}{\sigma}$

For X = 2470

$Z=\dfrac{2470-2500}{20}\\\\\Rightarrow\ Z=\dfrac{-30}{20}\\\\\Rightarrow\ Z=\dfrac{-3}{2}\\\\\Rightarrow\ Z=-1.5$

So, the z-score they corresponds to a lifespan of 2470 hours. =-1.5

Hence, the correct option is C.-1.5.

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2 years ago

PLZZ HELPP YOU WILL BE THE BRAINLEIST!!!!!!!

sasho [114]

i need a graph so i can see then i will solve it

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3 years ago

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Can anyone help me ?

nydimaria [60]

Which TWO expressions are equivalent to (x - y) 2/3 - 3/4 (y-x)

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3 years ago

a particular truck in a transportation fleet was driven 194,070 miles last year versus 329,919 miles this year . by what percent

Ann [662]

We take as the 100% the 194070 miles from last year. Then, we apply a rule of three:

$\begin{gathered} 194070\rightarrow100\text{ \%} \\ 329919\rightarrow x\text{ \%} \\ \Rightarrow x=\frac{329919\cdot100}{194070}=\frac{32991900}{194070}=170 \\ x=170\text{ \%} \end{gathered}$

Since 329,919 is the 170% of last year's miles, then the increase was of 70%

8 0

1 year ago

Please help! I am having trouble with this problem

Goryan [66]

Answer:

its 60 or 80 because its lower than one side

Step-by-step explanation:

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3 years ago

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