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ANTONII [103]
3 years ago
12

Who knows this? I’ll mark BRAINLIEST!

Mathematics
1 answer:
mestny [16]3 years ago
5 0

Answer:

i think it's a

Step-by-step explanation:

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How do you solve it?
Elis [28]

At heart we're being asked for a line through two points,


(40^\circ \textrm{ C}, 355 \textrm { m/s}) \quad \textrm{and} \quad (49^\circ \textrm{ C}, 360 \textrm { m/s})


In general the line through (a,b) and (c,d) is


(y-b)(c-a)=(x-a)(d-b)


Check that you understand why both (a,b) and (c,d) are on this line.


Here our indepedent variable, instead of x, is T, temperature. Our dependent variable is v, velocity. Substituting,


(v - 355)(49 - 40) = (T - 40)(360 - 355)


9(v - 355) = 5(T - 40)


v-355 = \frac 5 9 T - \frac{200}{9}


v= \frac 5 9 T - \frac{200}{9} + 355


v= \frac 5 9 T + \frac{2995}{9}


That's our answer; let's check it.


When T=40, v = (5/9)40 + (2995/9) = 355 good


When T=49, v= (5/9)49 + (2995/9) = 360 good




7 0
3 years ago
Lissie set a goal to save $320 for a new computer. So far she has saved $112. What percent of her goal has Lissie saved so far?
Mariulka [41]
These are false. Tami will need to work 11 weeks to get to her goal. To find out this problem, first take out the 100 from the 320 which then gives you 220.  Then divide 220 by 20 which gives you 11. 1 is wrong because Tami does not have to work more than 21 weeks to get to her goal. 2 is also wrong because Tami does not need to save more that 11 weeks to get to her goal, she has to work 11 weeks only. 
7 0
3 years ago
last month john spent 75.00 dollars on games. this month he only spent 63.00. he spent ___ percent less this month
aivan3 [116]
First, subtract 63 from 75 to find out how much it decreased. 
75 - 63 = 12 
Divide 12 by 75. 
12 / 75 = 0.16
In percents, that is 16%. 
He spent 16% less this month. 
Hope this helps!
3 0
4 years ago
Read 2 more answers
How do you tell if the equation 2y=8 is linear; How do you graph it?
GarryVolchara [31]
Solve for y and then graph it on a graphing calculator or since it doesn’t have a exponent you know it’s just a line because it would be the like y=4 which is a horizontal line at 4
3 0
3 years ago
What are the factors of that 697
Rainbow [258]
The factors of 697 or 6,9,7? 
5 0
3 years ago
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