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musickatia [10]

3 years ago

6

PLZZZ ANSERW CORRECTLY!!!!!!!!!!!!!!!!!!!!! i rilly need this you will get crown and I have 190 points you can have them!!!!!!!!

!!
From midnight to 7:00 am, the temperature rose 3/10 °C each hour. If the temperature at midnight was −1°C, what was the temperature at 7:00 am?

1 answer:

RideAnS [48]3 years ago

8 0

Answer:europa2433

Step-by-step explanation:

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The sum of the first 150 negative integers is represented using the expression

Leona [35]

Answer:

$\large\boxed{-11,325}$

Step-by-step explanation:

First simplify:

$-1-(n-1)=-1-n-(-1)=-1-n+1=-n$

Therefore we have:

$\sum\limits_{n=1}^{150}[-1-(n-1)]=\sum\limits_{n=1}^{150}(-n)=(-1)+(-2)+(-3)+...+(-150)\\\\-1,\ -2,\ -3,\ -4,\ ...,\ -150-\text{it's the arithmetic sequence}\\\text{with the common difference d = -1.}\\\\\text{The formula of a sum of terms of an arithmetic sequence:}\\\\S_n=\dfrac{a_1+a_n}{2}\cdot n\\\\\text{Substitute}\ n=150,\ a_1=-1,\ a_n=-150:\\\\S_{150}=\dfrac{-1+(-150)}{2}\cdot150=(-151)(75)=-11,325$

8 0

3 years ago

Bethany sells roses and petunias. The expression 3r+2.5p3r+2.5p gives the cost (in dollars) of rr roses and pp petunias. What is

yawa3891 [41]

Answer:

The cost of 7 roses and 8 petunias is $9001

Step-by-step explanation:

We are given expression for cost as

$C=3r+2.5p^3r+2.5p$

where

r is number of roses

p is petunias

We are given

r=7

and

p=8

so, we can plug here

$C=3(7)+2.5(8)^3(7)+2.5(8)$

now, we can simplify it

and we get

$C=9001$

So,

The cost of 7 roses and 8 petunias is $9001

5 0

4 years ago

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What is the first step in solving 5x-3=12?

sergij07 [2.7K]

Answer: 5x = 12 + 3

5x = 15 (divide both sides by 5 to get x)

Step-by-step explanation:

$5x/5 = 15/5\\x = 3$

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4 years ago

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4 years ago

Which equation can be used to determine the distance between the origin and (-2, -4)?

sveticcg [70]

$~~~~~~~~~~~~\textit{distance between 2 points} \\\\ (\stackrel{x_1}{-2}~,~\stackrel{y_1}{-4})\qquad \underset{origin}{(\stackrel{x_2}{0}~,~\stackrel{y_2}{0})}\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ d=\sqrt{[0 - (-2)]^2 + [0 - (-4)]^2}$

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3 years ago