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Musya8 [376]
3 years ago
7

The average ages of three persons is 27 years. Their ages are in the proportion of 1:3:5.What is

Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
3 0
X+3x+5x=27
x=27/9=3
youngest one is 3 years old.
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A boy saves 80p a day, How much does it take him to save $40
laiz [17]

Answer:

50 Days

Step-by-step explanation:

I'm not sure what the unit "p" is, but I believe it is pennies so. $40/0.80 gives you 50 which is the amount of days it would take for you to get to $40 if you receive 80 cents a day

8 0
2 years ago
Mathwiz wya?? pic below i need help asap
n200080 [17]

Answer:

Step-by-step explanation:

First, you gotta work out the hypotenuse of ABC, which is AC.

To do that, you need to figure out the scale factor between the two right-angled triangles. You can do that for this question because this is a similar shapes question.

12.5/5 = 2.5

The scale factor length between the two triangles is 2.5.

You can use 2.5 now to work out AC, so AC would be 13 x 2.5, which gives 32.5.

Now that you've got the hypotenuse and BC of ABC, you can use Pythagoras's theorem to work out the length of AB

Pythagoras's theorem = a^2 + b^2 = c^2

a = BC = 12.5

b = AB = we need to work this out

c = AC (the hypotenuse we just worked out) = 32.5

12.5^2 + b^2 = 32.5^2 Let's both simplify and rearrange this at the same time so that we have our b on one side.

b^{2} = 1056.25 - 156.25

b = \sqrt{(1056.25 - 156.25)}

b = \sqrt{900}

b = AB = 30  We've found b or AB, now we can work out the perimeter of ABC.

Perimeter of ABC = AB + BC + AC

= 30 + 12.5 + 32.5

= 75  Here's the perimeter for ABC.

8 0
2 years ago
evelyn is going on a hike. she will hike 4 miles in all. so far, she has hiked 1/2 of the total distance. how far has she hiked
lana [24]

Answer:

2 miles

Step-by-step explanation:

1/2 of 4 is 2

Mathematically

1/2 × 4/1

4/2

2

5 0
2 years ago
In this polygon, which angle is an interior angle? Multiple Choice
makvit [3.9K]

Answer:

option c = angle b

Step-by-step explanation:

as angle b is inside the polygon as the rest angles are exterior(outside the polygon )

7 0
3 years ago
Read 2 more answers
Help picture below problem 18
Natali [406]

<u>Solution</u><u> </u><u>:</u><u>-</u>

This triangle is a right angled triangle as we can see ∠POC, has a right angled sign. Now, we will assume the missing angle to be x, thus,

25° + 90° + x = 180° ( Angle sum property of a triangle )

115° + x = 180°

x = 180° - 115°

x = 65°

Thus, the measure of missing angle is 65°.

Hope that helps. :D

3 0
2 years ago
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