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viktelen [127]
3 years ago
14

4. Kiran's uncle is 54 years old. He is 8 years older than three times Kiran's age. Find Kiran's age,​

Mathematics
1 answer:
levacccp [35]3 years ago
7 0

Kiran's age = x

Uncle's age = 54

Also,

Uncle's age = 8 + 3x

Now,

8 + 3x = 54

3x = 54 - 8

3x = 46

x = 46/3

x = 15.33

x = 15 (rounded)

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Factor completely 2x5 + 10x4 − 22x3.
Luba_88 [7]

Given equation is :

2x^{5}+10x^{4}-22x^{3}=0

Taking out 2x^{3} common we get,

x^{2}+5x-11=0

Now solving this we get,

As 11 is not factor-able, we will solve it using the formula,

x=\frac{-b+\sqrt{b^{2}-4ac}}{2a}

a=1 b=5 and c=-11

we get,

x=\frac{-5+\sqrt{69} }{2} and x=\frac{-5-\sqrt{69} }{2}

5 0
3 years ago
Read 2 more answers
15 POINTS: A motorboat traveling downstream covers the distance between port M and port N in 6 hours. Once, the motorboat stoppe
pav-90 [236]

Answer: S=18

Step-by-step explanation:

D = distance between M and N  

S = speed of the boat  

S + 2 = speed down streem  

S - 2 = speed upstream  

T = time on the downstream leg until the boat made its turn  

9-T= time on the upstream leg  

6(S + 2) = D  

T (S + 2) = D - 40  

(9-T)(S-2) = D - 40  

now we have 3 equations and 3 uknowns  

lets multply everything out  

6S + 12 = D  

ST + 2T = D - 40  

9S - 18 - ST + 2T = D - 40  

add the second 2 together to get rid of the ST term  

9S - 18 + 4T = 2D - 80  

and lest subtract them from one annother  

2ST - 9S + 18 = 0  

if we can find T in terms of S we will have a quadratic equation, and will be able to use the quadratic formula / factor

9S - 18 + 4T = 2(6S + 12) - 80  

9S - 18 + 4T = 12 S + 24 - 80  

4T = 3S - 38  

T = 0.75 S - 9.5  

2S(0.75 S - 9.5) - 9S + 18 = 0  

1.5 S^2 - 28 S + 18 = 0  

S = 18, 2/3  

now it doesn't make sense for S to equal -2/3 as it suggests the boat moves backward when it is going up stream. (and that it travels downstream for negative time)  

S = 18

8 0
3 years ago
7x + 20 <img src="https://tex.z-dn.net/?f=%5Cgeq" id="TexFormula1" title="\geq" alt="\geq" align="absmiddle" class="latex-formul
Contact [7]

Answer:

x ≥  -200/7    is your answer

Step-by-step explanation:

7 0
3 years ago
Come up with your own system to measure angles. What would you call your unit of measure and how would it work. Describe your sy
aleksley [76]

Answer:

You can try a picture memory method to help students

An example write down notes of what the triangle laws are for angles.

Then interpret them into your picture measurement theory.

Example could be the perpendicular measures of a right angle can be used

to find an area would be the M but as we are finding angles we could use the Big A instead of degrees sign.

We could provide pictures of cars to represent trigonometry

Where back wheels opposite angles and sides from slant are both the unit measure used in  Side/sin( A) x sin (B)   so this way you label the car wheel angle above of the square boot 'side on' and this angle is A

The B is the one above it linking the slant to find the other measure.

You are asked to design a theme around measuring angles so you need to look at other sin cos and tan calculus to design a picture that can create an image like i've given to find slant.

You need to one that finds angles.

However if you do find a car can help you can always call it square boot as in square root, considering 2/3 of sin cos and tan are square root measures.

Step-by-step explanation:

See the attached ideas and trigonometry

Picture memory Trigonometry

Picture 1. Sunrise Ah side looks for side measure.

The number above is the hypotenuse

A/H = cos ( ) x hyp =base A/H = cos ( ) x hyp = side

Picture 2.Sunrise Soh looks for side measure.

The number above it is the hypotenuse

O/H = sin ( ) =p (for product) take the p x hyp.

Picture 3 Sunrise Toast (Toa) looks for side measure = O/A

Tan ( lower angle ) x base = side

Picture 4 Side of car (Soh) with window as hypotenuse.

Two wheels are the 2 angles given and the back seat is perpendicular to both wheels =

so the triangle structure looks like this /00|7

so you type in 7/sin ( 1st wheel) x (2nd wheel) = hypotenuse.

Both angles given or worked out this is when this is used.

Picture 5 Electric mast looking for slope SIN =S/P = O/A

Angle at top

We have the side at 70 and looking for the slope

Sin( top angle) = p then side/p = hyp

Picture 6

Top angle and base given creates a T this means half both of them before dividing.

To find hypotenuse

Half = 1/2 base / sin (1/2) = hypotenuse

Picture 7

Top angle and base given creates a T this means half both of them before dividing.

To find height =

Half = 1/2 base /Tan 1/2) = Triangle height.

Key checker after pictures are drawn is;

sunrise = low angle x side or low angle x base = hypotenuse.

car = backseat x wheels = hypotenuse always remember when car on side the first

wheel first, second wheel 2nd first in the calculator. The wheels are the 2 angles that

make the car when flipped.

Half = 1/2 base / sin (1/2) = hypotenuse

Half = 1/2 base / tan (1/2) = height

Just take care with top angle and lower angle key words in the drawing descriptions and then the pictures will help.

4 0
3 years ago
1 pound = 0.454 kg 1 kg = 1000 g Using the conversions given, convert 2 pounds to grams (round to the nearest whole gram).
adelina 88 [10]

Answer:

908 grams


Step-by-step explanation:

To go from 2 pounds to grams, we need to

  • first convert 2 pound to kg, then
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We know, 1 pound = 0.454 kg, so 2 pound is 0.454*2=0.908 KG

Also, we know, 1 KG = 1000 grams, so 0.908 KG = 0.908*1000=908 grams


2 pounds = 908 grams

5 0
3 years ago
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