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Ostrovityanka [42]
3 years ago
6

Please help me with my algebra homework (Attachment)

Mathematics
2 answers:
Lapatulllka [165]3 years ago
5 0

Answer:

D.

Step-by-step explanation:

To see if a line is parallel to y = -(2/3)x + 8 you need to check if the coefficients at y and x are of the same ratio. This immediately removes answers A and C, because of the wrong sign at x compared to y.

What's left is to see which of the answers B and D passes through (4, -5) by inputting x = 4 and y = -5

B.

left = -5 - 5 = -10

right = -(2/3)(4 + 4) = -16/3

So it's D. Let's verify:

D.

left = -5 + 5 = 0

right = -(2/3)(4 - 4) = 0

Checks out.

Sholpan [36]3 years ago
5 0

Answer:

Option D

Step-by-step explanation:

→ Find the gradient of the parallel line

y=-\frac{2}{3} x+c

→ Substitute in the coordinates as x and y values to find c

5=-\frac{2}{3} *-4+c

→ Simplify

5=\frac{8}{3} +c

→ Minus  \frac{8}{3}  from both sides to find c

c = \frac{7}{3}

→ Expand out all options and then see which one contains all the numbers above

Option D

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garik1379 [7]

Answer:

  • C. 40 ft²

Step-by-step explanation:

<u>Triangle area formula:</u>

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  • b = 8 ft, h = 10 ft

<u>The area is:</u>

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4 0
3 years ago
An eight-sided game piece is shaped like
DiKsa [7]

Answer:

27.5 mm

Step-by-step explanation:

Let the side length of each of the side of the base of the pyramid be a, hence:

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80 = 4a

a = 20 mm.

The distance from the middle of the square pyramid to the side = r = half of the side length = a/2 = 20 / 2 = 10 mm.

r = 10 mm

The slant height (s) = 17 mm, Let h be the height of each of the pyramid. Using Pythagoras theorem:

r² + h² = s²

17² = 10² + h²

h² = 17² - 10² = 189

h = √189

h = 13.748 mm

The length of the game piece = 2 * h = 2 * 13.748 = 27.5 mm to nearest tenth of a mm.

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Molly is making scarves. She bought 3 2/3 yards of fabric. Her total cost was $44. What was the cost per yard?
scZoUnD [109]

Answer:

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Step-by-step explanation:

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