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mars1129 [50]
3 years ago
8

Onyango is now three times as old as his daughter and four times as old as his son. Eight years from now, Onyango's age will be

twelve years more than the sum of the ages of his son and daughter. Find their present ages.
Mathematics
1 answer:
Dahasolnce [82]3 years ago
8 0

Answer:

Onyango is 48, his daughter is 16 and his son is 12

Step-by-step explanation:

Let's call Onyango's age x, therefore his daughter and son's ages are 1/3 x and 1/4 x respectively. We can write:

x + 8 = 12 + (1/3x + 8 + 1/4x + 8)

x + 8 = 7/12x + 28

5/12x = 20

x = 48 → 1/3x = 48 / 3 = 16, 1/4x = 48 / 4 = 12

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If LR = 12 and LP = 7, find PR. Explain.
sergiy2304 [10]

Answer:

  PR = 5 because LP + PR = LR according to the Segment Addition Postulate, and 7 + 5 = 12 using substitution

Step-by-step explanation:

The naming of the segments suggests that point P is between L and R, so that ...

  LP + PR = LR

This corresponds to the last choice.

_____

<em>Comments on the alternate interpretation</em>

On the other hand, if point L is between P and R, then the segments are PL and LR. The Segment Addition Postulate would tell you that ...

  PL + LR = PR

The Reflexive Property of Congruence would tell you that PL = LP. The Substitution Property would tell you LP can be substituted into this equation, making it ...

  LP + LR = PR

and by the commutative property, ...

  LR + LP = PR.

Multiple properties of addition and congruence are involved with this interpretation, which more or less matches the third choice. That is, the simple explanation of answer choice 3, by itself, is insufficient to explain why the length of PR should be considered to be 19, not 5.

5 0
3 years ago
Read 2 more answers
The owner of a ski resort estimates that a new 4-person ski lift will cost $5,500,000. The owner begins making payments on March
disa [49]

Amount must the owner make to have the cost of the ski lift in 5 years  is $6,711,045.22.

<h3>What is compound interest?</h3>

Compound interest is the addition of interest to the principal sum of a loan or deposit, or in other words, interest on principal plus interest.

A = P(1 + r/n)^{nt}

P =5,500,000

r =4%= 0.004

n =4

t= 5 years.

Now,

A = P(1 + r/n)^{nt}

A = 5,500,000.00(1 + 0.04/4)^{(4)(5)}

A = 5,500,000.00(1 + 0.01)^{20}

A = $6,711,045.22

Hence, The total amount accrued is $6,711,045.22.

Learn more about compound interest here:

brainly.com/question/14295570

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7 0
2 years ago
The Pythagorean Theorem ONLY works on which triangle?
ioda

Answer:

right angle ( right )

Step-by-step explanation:

Pythagoras' theorem only works for right-angled triangles, so you can use it to test whether a triangle has a right angle or not. In the triangle above, if a 2 < b 2 + c 2 the angle is acute.

5 0
3 years ago
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Can someone please explain this for me? is the answer -15?
frosja888 [35]

Answer:

Step-by-step explanation:

3 0
3 years ago
3 to the x power - 1 = 9 to the x power+2
Tom [10]

So we need to solve:

3ˣ⁻¹ = 9ˣ⁺²

To do this, we need to have the same base for both sides of the equation.

So let's go with the base of 3.

3² = 9

3ˣ⁻¹ = (3²)ˣ⁺²

3ˣ⁻¹ = 3²ˣ⁺⁴

Since the bases are the same now, we need to get rid of them and we would get:

x - 1 = 2x + 4

Subtract both sides by 2x:

-x - 1 = 4

Add 1 to both sides:

-x = 5

Divide both sides by -1:

x = -5

8 0
3 years ago
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