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ioda
3 years ago
7

Please show your work in the answers. Please answer the 3 questions I put.

Mathematics
1 answer:
Naily [24]3 years ago
5 0

Answer:

20%

a) a train goes 60 mph for 180 miles

50 miles

Step-by-step explanation:

6/30=.20 = 20%

180 miles divided by 60 mph=3 hours

80%x = 40 miles

.8x=40

.8x/.8=40/.8

x=50 miles

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Write the equation in slope-intercept form. (-7,-2), (2,3)
Vadim26 [7]

Answer:

y = -5/9x + 4.1

(try doing this yourself first with different points to make sure this is the right answer, because im to lazy to check myself but ill try checking D:)

Step-by-step explanation:

first you have to find the slope . to do this use the equation y2 - y1/ x2 - x1

so write as -2 - 3/  -7 - 2 is equal to -5/-9

so now write y = -5/9x + b

we must now find the y-intercept so substitute one of the points given. lets substitute 2,3 it looks easier. So it will look like 3 = -5/9(2) + b

3 = -5/9(2) + b

3 = -10/9 + b

b = 3 + 10/9

b = 4.111111

um just round to the tenth place

6 0
2 years ago
Dear algebra stop asking us to find your x don't ask y​
nirvana33 [79]

Answer:

PREACH

Step-by-step explanation:

that is so smart :)

7 0
3 years ago
Read 2 more answers
Find the midpoint of MN M=-24 N=1
LekaFEV [45]
Midpoint=12.5 let me know if this helps
4 0
3 years ago
How do you do r/12 =1.5 ??
Brrunno [24]

Answer:

  multiply by 12: r = 18

Step-by-step explanation:

Use the multiplication property of equality. It tells you that multiplying both sides of an equation by the same value does not change the values of any of the variables. Here we can multiply by 12 and we get ...

  r(12/12) = 1.5(12)

Now, the properties of the identity element for multiplication come into play. When we multiply r by 12/12=1, we do not change the value of r, so we can simplify this to ...

  r = 18

_____

We chose to multiply by 12 precisely because 12/12 = 1, and the result on the left side of the equation is r.

7 0
3 years ago
What is X?<br> x-3.9=12.4
valentinak56 [21]

Answer:

Its 8.5

Step-by-step explanation:

I calculator

12.4+-3.9=8.5

4 0
3 years ago
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