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aivan3 [116]
2 years ago
8

Stefanie is three times as old as Hannah. Four years ago, the sum of their ages was 28. How old are they now? Be sure to define

your variable(s)
Mathematics
1 answer:
siniylev [52]2 years ago
4 0

Stefanie's age is 54 and Hannah's age is 18

<h3>How to determine their current ages?</h3>

Let x represent Stefanie's age and y represent Hannah's age

<u>Presently</u>

x = 3y

<u>Four years ago</u>

x - 4 + y - 4 = 28

Substitute x = 3y in the above equation

3y - 4 + y - 4 = 28

Evaluate the like terms

2y = 36

Divide both sides by 2

y = 18

Substitute y = 18 in x = 3y

x = 3 * 18

Evaluate

x = 54

Hence, Stefanie's age is 54 and Hannah's age is 18

Read more about equations at:

brainly.com/question/2972832

#SPJ1

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Answer:

x = 14\sqrt{2}

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Step-by-step explanation:

Notice that the top triangle is a 45-45-90 triangle and the triangle below is a 30-60-90 triangle.

Using the fact that the top triangle is a 45-45-90 triangle and also an isosceles triangle, we can see that <em>x</em> will be the same as its respective leg, 14\sqrt{2}

Now, we must find a side length of the bottom triangle. We can use the Pythagorean Theorem to find the third side of the top triangle, which is also a side of the bottom triangle. We can find that the third side must be 28. We can now use this to find the other sides of the bottom triangle.

Since <em>y</em> is opposite to the 30 degree angle, it is half of the hypotenuse. The hypotenuse which we found earlier is 28, therefore, <em>y</em> is 14. <em>z </em>is then 14\sqrt{3} using either Pythagorean Theorem or special right triangle properties for 30-60-90.

7 0
3 years ago
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solmaris [256]
X = Amount paid one hour
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6 0
2 years ago
What is the value of v?<br> 1 / 4 (v – 7) = 2
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1/4v = 15/4

Multiply by 4/1 on both sides to get v

(4/1) 1/4v = 15/4 (4/1)

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6 0
3 years ago
A retailer buys pants at $28.00 and sells them for $42.00. The percent of markup on cost is
Elena L [17]
30% is the answer to the question.
4 0
3 years ago
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List multiples of <img src="https://tex.z-dn.net/?f=%5Cfrac%7B5%7D%7B8%7D" id="TexFormula1" title="\frac{5}{8}" alt="\frac{5}{8}
Mila [183]

Answer:

5/8

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Step-by-step explanation:

 DO NOT multiply both the numerator and the denominator by the same value.

6 0
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