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Doss [256]
3 years ago
5

The value of y varies directly with x, and y = 104 when x = 13. Find y when x = 2.5. HELP PLEASE

Mathematics
2 answers:
Anastaziya [24]3 years ago
8 0

See picture for solution steps and answer.

Delvig [45]3 years ago
3 0

Answer:

Step-by-step explanation:

If a given variable varies directly with another variable, it means that an increase in the value of the given variable results in a corresponding increase in the value of the other variable. Also, a decrease in the value of the given variable results in a corresponding decrease in the value of the other variable.

If value of y varies directly with x, we would introduce a constant of variation so that the expression becomes

y = kx

When x = 13, y = 104. Substituting into the above expression, it becomes

104 = 13k

k = 104/13

k = 8

The equation becomes

y = 8x

Therefore, when x = 2.5,

y = 8 × 2.5

y = 20

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USE PEMDAS ( parenthesis, exponents, multiplication, division, addition, subtraction)

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The answer is: 14
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Answer:

D. 14.73

Step-by-step explanation:

According to Pythagoras,

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x^2 = 19^2 - 12^2

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harina [27]

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20.  300π m³

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Step-by-step explanation:

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4 0
3 years ago
PLEASE HELP ASAP 30 POINTS ):
ladessa [460]

Answer:

c (0,-4)

Step-by-step explanation:

-5x+y = -4

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Solve the first equation for y since we are using substitution.

-5x+y = -4

Add 5x to each side

-5x+5x+y = -4+5x

y = 5x-4

Substitute this equation y = 5x-4 into the second equation.

4x -4(5x-4) = 16

Distribute the -4

4x - 4(5x) -4(-4) = 16

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Combine like terms

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Subtract 16 from each side

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Divide by -16

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But we still need to find y

y = 5x-4

y = 5(0) -4

y = -4

5 0
3 years ago
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