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vampirchik [111]
3 years ago
7

-0.4(0.5z + 4) = 3.2 What is the answer for this

Mathematics
2 answers:
Marta_Voda [28]3 years ago
8 0
-0.2z-1.6=3.2 you distribute the -0.4 to 0.5z and 4 and you get the equation above and then you add 1.6 to the other side and get
-0.2z=4.8 you divide both sides by -0.2 and you get z=-5
netineya [11]3 years ago
6 0

Answer:

z = - 24

Step-by-step explanation:

Given

- 0.4(0.5z + 4) = 3.2 ( divide both sides by the multiplier - 0.4 )

0.5z + 4 = - 8 ( subtract 4 from both sides )

0.5z = - 12 ( divide both sides by 0.5 )

z = - 24

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(3,51)(5,59)
slope = (59 - 51) / (5 - 3) = 8/2 = 4

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so ur equation is : y = 4x + 39...but u need it in standard form

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4x - y = -39 <==== this is ur equation...x = number of hrs and y = total velocity
====================
ur x axis is the number of hrs
ur y axis is total velocity in km

y = 4x + 39......slope = 4.....y int = (0,39)....x int is (- 9.75,0) or -9 3/4 for graphing purposes)....so start at (-9.75,0)...and since the slope is 4, go up 4 and to the right 1....plot that...then up 4 and to the right 1...plot that...u will cross the y axis at (0,39)....and just connect ur plotted points and u have ur line......or what u can do since it is asking for the first 6 hrs....sub in 1 for x and solve for y....then sub in 2 for x and solve for y...keep doing this up till 6 and u will have ur line up till 6 hrs
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