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3 years ago

0.5% of a is 3 then what is a?

Mathematics

1 answer:

Mandarinka [93]3 years ago

6 0

Answer:

Step-by-step explanation:

0.5%a = 3

×10 ×10

5%a = 30

×20 ×20

100%a = 600

a = 600

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a wire of length 200 cm is cut into two parts and each part is bent to form a square.If the area of the larger square is 9 times

diamong [38]

Answer:

The perimeter of the larger square is $150cm.$

Step-by-step explanation:

First of all, let one part of it be " $x$ "

and the other part of it " $200-x$ "

Now to solve this :

The area of the square = $L^2$

The area of one part of the square = $x^2$

The area of the other part of the square = $(200-x)^2$

$9x^2= (200-x)^2\\9x^2=40000-400x+x^2$

Now, add, $-4x^2$ to both the sides :

$9x^2-9x^2=40000-400x+x^2-9x^2\\-1(8x^2+400x-40000)=0$

Now, take out the "8" which is common :

$-8(x^2+50x-5000)=0$

Now, divide it by $-8$ :

$x^2+100x-50x-5000=0\\x(x+100)-50(x+100)=0\\(x+100)(x-50)=0\\$

$x=-100$ or $50$

So, now we know that :

One of the part is = $50cm$

And the other part is = $150cm$

Thus the perimeter of the larger square is = $150cm$

3 0

3 years ago

Need help finding a constant k at which the function is continuous everywhere.

saveliy_v [14]

Answer:

k = -6/35

Step-by-step explanation:

To make the function continuous

kx^2 = x+k

These must be equal where the function is defined for two different intervals

This is at the point x=-6 so let x=-6

k(-6)^2 = -6+k

36k = -6+k

Subtract k from each side

36k-k = -6+k-k

35k = -6

Divide by 35

35k/35 = -6/35

k = -6/35

3 0

3 years ago

Read 2 more answers

At a park, there are 38 people playing tennis some or playing doubles and some are playing singles there are 13 matches in progr

dmitriy555 [2]

X = number of singles matches
y = number of doubles mnathes

so we have the equation x + y = 13.......(1)

also

2x + 4y = 38 ...........(2)

(1) and (2) are the required equations

b) Find how many maches are in progress by solivng the above equations:-

x + y = 13 multiply this by -2:-
-2x - 2y = -26
2x + 4y = 38 Adding to removes the terms in x:-

2y = 12

y = 6

so x = 13-6 = 7

So the answer is 6 double matches and 7 singles are in progress.

5 0

3 years ago

What is the product of all possible digits x such that the six-digit number 341,4x7 is divisible by 3?

ss7ja [257]

Answer:

Step-by-step explanation:

x=2 and x = 5 and x = 8

341,427 mod 3 = 0

341457 mod 3 = 0

341487 mod 3 = 0

Product =2 x 5 x 8 = 80

4 0

3 years ago

Help no comprehension

dimaraw [331]

Answer:

x=17

Step-by-step explanation:

So the outside angle is basically is an addition of the two angles given to you. 60°+2x°=94°.

4 0

3 years ago

0.5% of a is 3 then what is a?​

0.5% of a is 3 then what is a?