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alexandr1967 [171]
3 years ago
11

The value of y varies directly with x. when y = 7.5, x = 5. what is the value of y when x = 80?.

Mathematics
1 answer:
Ksenya-84 [330]3 years ago
4 0

Answer:

Step-by-step explanation:

120 = y. the ratio is 3:2

80/2 is 40

40 times 3 is 120

120:80 = 3:2

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the big dog weighs 5 times as much as the little dog. The little dog weighs 25% as much as the medium sized dog. The medium size
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5 0
3 years ago
If f(x) =- 2x + 5, find f(4x)​
adelina 88 [10]

Answer:

f(4x)=-8x+5

Step-by-step explanation:

We are given the function:

f(x)=-2x+5

And we want to find:

f(4x)

So, by substitution, we acquire:

f(4x)=-2(4x)+5

Multiply. So, our answer is:

f(4x)=-8x+5

8 0
2 years ago
If you roll a 6-sided die 48 times, what is the best prediction possible for the number of times you will roll a six?
OlgaM077 [116]
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P(six) = 1/6

If you roll it 48 times, 
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4 0
3 years ago
If c and d are supplementary, and the measure of d is 45 what is the measure of c?
dsp73
The definition of supplementary is that the angles add to 180°. Hence, <em>c + d = 180; c + 45 = 180  </em>by substitution and finally ∡c = 135°.
5 0
3 years ago
Read 2 more answers
50 points!!
timurjin [86]

Answer:

y < -8

y > 4

Step-by-step explanation:

Absolute Value Inequality entered :

     |y+2|>6

Step by step solution :
Step 1: Rearrange this Absolute Value Inequality

Absolute value inequalitiy entered

     |y+2| > 6

Step 2: Clear the Absolute Value Bars

Clear the absolute-value bars by splitting the equation into its two cases, one for the Positive case and the other for the Negative case.

The Absolute Value term is |y+2|

For the Negative case we'll use -(y+2)

For the Positive case we'll use (y+2)

Step 3: Solve the Negative Case

     -(y+2) > 6

    Multiply

     -y-2 > 6

    Rearrange and Add up

     -y > 8

    Multiply both sides by (-1)

    Remember to flip the inequality sign

     y < -8

    Which is the solution for the Negative Case

Step 4: Solve the Positive Case

     (y+2) > 6

    Rearrange and Add up

     y > 4

    Which is the solution for the Positive Case

Step 5:

Wrap up the solution

 y < -8

 y > 4

Solutions in Interval Notation

   (-∞,-8)

   (4,+∞)

Solutions on the Number Line

 

Two solutions were found :

 y > 4

 y < -8

6 0
2 years ago
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