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3 years ago

5

Ellie is driving at a speed of 55 miles per hour. Let h represent the number of hours that Ellie drive at this speed. Write an a

lgebraic expression to represent the number of miles that Ellie drives during this time

1 answer:

loris [4]3 years ago

4 0

I believe it would be 55 x h.

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andrey2020 [161]

You would multiply the students by the price (12*10=120) then multiply chaperones by price (6*15=90) then add both prices together to get 210. Then you would subtract 210 from 380 to get how many boys are in the class. 380-210=170. Since each student cost 10 so you would divide 170/10=17. There would be 17 boys in your class.

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3 years ago

One of your friends is testing the effect of drinking coffee on the duration of cold symptoms. The common cold lasts, on average

Goshia [24]

Answer: 0.0930

Step-by-step explanation:

As per given , we have

H0: μcoffee = 6

Ha: μcoffee < 6

She finds z = −1.68 with one-sided P-value P = 0.0465.

The P-value for two-tailed test is calculated by :

$2P(Z>|z|)$

For z= -1.68 , we have

$2P(Z>|-1.68|)=2P(Z>1.68)$

$=2(1-P(z\leq1.68))\ \ [\because\ P(Z>z)=1-P(Z\leq z)]$

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Hence, the correct two-sided P-value for z = −1.68 is 0.0930 .

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3 years ago

I need a check so just want some help

bazaltina [42]

Answer and Step-by-step explanation:

We are told that AB is equal to 3x + 1.

BC is then half of AB, or $\frac{3x+1}{2}$ .

AC is then 4 less than BC, or $(\frac{3x+1}{2} ) - 4$

To find the perimeter, we add all of these together.

3x + 3x/2 + 3x/2 = 6x

1 + 1/2 + (1/2 - 4) = -2

The final answer is 6x - 2.

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antiseptic1488 [7]

Answer:

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3 years ago

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Sveta_85 [38]

It is -2x because -6 + 4 =-2

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3 years ago

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