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nadezda [96]
3 years ago
9

Determine whether y varies directly with x. If so, find the constant of variation k. 7y = –x

Mathematics
2 answers:
saul85 [17]3 years ago
8 0
Answer: B



Explanation: comment above me LOL
fomenos3 years ago
3 0

Answer:

b

Step-by-step explanation:

The equation of quantities in direct variation is

y = kx ← k is the constant of variation

Given

7y = - x ( divide both sides by 7 )

y = - \frac{1}{7} x ← in direct variation form

with k = - \frac{1}{7}

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Can anybody help me please I'm stuck with this question.
tekilochka [14]

Answer: 18 units

Step-by-step explanation:since its is a horizontal line x2 - x1

7 -1 = 6

line 2:

since this is a vertical line y2 - y1

7 - 3 = 4

line 3:

since this is a horizontal line x2 - x1

7 - 4 = 3

line 4:

for this we need to use the distance formula which allows us to find the distance making a third point to form a right angle triangle

point 1: (1,3)

point 2: (4,7)

point 3 (new point) : (4,3)

now we can apply the pythogorean thereum (C squared = B squared + A squared) with the following lines.

line 1: (1,3) - (4,7)

line 2: (1,3) - (4,3)

line 3: (4,3) - (4,7)

line 1 squared = line2 squared + line 3 squared

calculate length of line 2 and 3

line 1 squared = (4 - 1) squared + (7 - 3) squared

line 1 squared = 3 squared + 4 squared

line 1 squared = 9 + 16

line 1 squared = 25

root both sides

line 1 = 5

add all the liens together

6 + 4 + 3 + 5 = 18

8 0
3 years ago
What is the volume of a rectangular prism if the length Is 9 the width is 2 and the height is 3
Bas_tet [7]
V = length×width ×height

V = 9 × 2 × 3

V = 54 units cubed
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3 years ago
Five pencils and 4 erasers cost $7.65. Four pencils and 5 erasers cost $7.20.What is the cost of 2 erasers?
Arturiano [62]

I think this is right.. I tried my best. If u get it sorry... I’m very sorry



1. Divide 7.20 by 4 since the 4 are the pencils

2.divide 7.20 by 5 ( 5 represents the erasers )

3. Then finally multiply 1.44 from 7.20/5 and
2 and u get 2.88
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Which equation represents the graphed function?
uysha [10]

Answer:

Step-by-step explanation:

6x

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3 years ago
What is the opposite of -3.4? [Type your answer as a number.]
snow_lady [41]
The opposite of -3.4 would be positive 3.4
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3 years ago
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