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3 years ago

Best tip for Maths test to figure out challenging problems

Mathematics

1 answer:

padilas [110]3 years ago

3 0

First solve the easier questions which can be solved in very low time.
Drop out the harder questions for last.
After completing the easier questions take your time to complete harder ones.
Stay away from unsolvable questions

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The three sides of a triangle are (x+5)cm ,(2x+4)cm and (2x-3)cm .

natali 33 [55]

Hey ! there

Answer:

a. Perimeter = ( 5x + 6 ) cm

b. Perimeter when x is equal to 10 = 56 cm

Step-by-step explanation:

In this question we are given with three sides of a triangle that are as follows ,

 ( x + 5 ) cm

 ( 2x + 4 ) cm

 ( 2x - 3 ) cm

And we are asked to :

a. find perimeter of triangle.

b. find perimeter if x is equal to 10 .

We know that for finding perimeter of any shape we must have to add all the sides of the shape or ,

$\qquad \: \underline{\boxed{\frak{Perimeter = Sum \: of \: all \: sides}}}$

Solution : -

( a )

Now adding all the three sides of triangle to find the perimeter .

$\hookrightarrow \quad \: ( x + 5 ) + ( 2 x + 4 ) + ( 2x - 3 )$

$\hookrightarrow \quad \: \: x + 5 + 2x + 4 + 2x - 3$

Combining like terms :

$\hookrightarrow \quad \:x + 2x + 2x + 5 + 4 - 3$

Now , solving :

$\hookrightarrow \quad \: \red{\underline{ \boxed{ \frak{(5x + 6) \: cm}}}}$

Therefore , perimeter of triangle is 5x + 6 centimetres .

( b )

Now , we are finding perimeter of triangle when value of x is 10 . So substituting value of x in given sides of triangle ,

First Side :

x + 5

10 + 5

15 cm

Second Side :

2x + 4

2 ( 10 ) + 4

20 + 4

24 cm

Third Side :

2x - 3

2 ( 10 ) - 3

20 - 3

17

So , all the sides are 15 cm , 24 cm and 17 cm .

Now , adding all these to find perimeter . 

 $\hookrightarrow \qquad \: 15 + 24 + 17$ 

 $\hookrightarrow \qquad \: 39 + 17$ 

 $\hookrightarrow \qquad \: \red{\underline{\boxed{\frak{56 \: cm}}}}$ 

Therefore , perimeter of triangle when value of x is 10 cm is 56 cm .

Alternative Solution : -

As above we have find the perimeter of triangle in term of x that is ( 5x + 6 ) cm. So we can put value of x as 10 in this to get perimeter. So ,

5x + 6

5 ( 10 ) + 6

50 + 6

56 cm

Therefore, perimeter of triangle is 56 cm .

<h2>#Keep Learning</h2>

4 0

2 years ago

Read 2 more answers

The circumference is 9.42 cm.

ehidna [41]

So the circumference is 9.42 then 91/9.42 = about 9

4 0

3 years ago

Sally had 24 apples,she wanted to put all the apples in 4 bags.How many apples

vazorg [7]

If she has 4 bags and 24 apples, we can do 24/4 to find out that 6 apples would go in each bag

Hope this helps

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4 years ago

PLEASE HELP ME I WILL MARK BRAINLIEST!!!!! point X is located at (3,2). Point Y is located at (3,-8).

vovikov84 [41]

Answer:

Point X is 10 units above Point Y or (X,Y-10)=Y

Step-by-step explanation:

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3 years ago

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George has a triangle-shaped garden in his backyard. He drew a model of this garden on a coordinate grid with vertices A(4, 2),

oksian1 [2.3K]

Given:

Vertices of a triangular garden:

A(4,2)
B(2,4)
C(6,4)
Scale factor = 0.5

Find the distance between points:

d = √(x2-x1)^2 + (y2-y1)^2

dAB = 2√2
dBC = 4
dCA = 2√2

A similarly shaped garden is to be created using the scale factor, 0.5:

A' = 2√2 / 0.5 = 4√2
B' = 4 / 0.5 = 8
C' = 2√2 / 0.5 = 4√2

6 0

3 years ago

Best tip for Maths test to figure out challenging problems​

Best tip for Maths test to figure out challenging problems