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zalisa [80]
3 years ago
10

I need help on number 5 please and thank you

Mathematics
2 answers:
valentinak56 [21]3 years ago
5 0
-4x -2y = 12
-x + 4y = 12
Multiply the first equation 2 then add to the second equation.
-8x -4y = 24
-x + 4y = 12
___________
-9x = 36
Divide both sides by-9
x = -4
Plug -4 back into either original equations and solve for y.
- -4 + 4y = 12
4 + 4y = 12
Subtract 4 from both sides
4y = 8
Divide both sides by 4
y = 2
(-4,2)
timama [110]3 years ago
4 0
X = -4

y = 2

I hope this helps. :)
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Diameter is the radius times 2, which is 18. 18 x 24 = 432 yards
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This is for jassy sleepy and.., umm some one els with an ice cream avitar.
Sliva [168]

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Step-by-step explanation:

5 0
2 years ago
Given the system of equations, what is the y-coordinate of the solution?5x - 4y = 7x = 5 - y
sveticcg [70]
5x - 4y = 7
x = 5 - y

5(5 - y) - 4y = 7
25 - 5y - 4y = 7
-5y - 4y = 7 - 25
-9y = - 18
y = -18/-9
y = 2 <== y coordinate is 2

6 0
3 years ago
A certain forest covers an area of 2900 km. Suppose that each year this area decreases by 8.5%. What will the area be after 8 ye
Ann [662]

Answer:

1425 square kilometer.

Step-by-step explanation:

2900 - 8.5% = 2653.5

2653.5 - 8.5% = 2427.9525

2427.9525 - 8.5% = 2221.5765375

2221.5765375 - 8.5% = 2032.74253181

2032.74253181 - 8.5% = 1859.95941661

1859.95941661 - 8.5% = 1701.8628662

1701.8628662 - 8.5% = 1557.20452257

1557.20452257 - 8.5% =1 424.84213815 ≈ 1425

3 0
3 years ago
Read 2 more answers
18. Jackie drives 160 miles from Gary, Indiana to
astra-53 [7]

Answer:

11 hours and 15 minutes (11.25)

Step-by-step explanation:

make a ratio

160:4.5

240/160=1.5

so 1 and 1/2 intervals of 4.5 hours

4.5+4.5= 9

4.5/2=2.25

9+2.25=11.25

6 0
3 years ago
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