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Marina86 [1]
3 years ago
10

Pete asked his friends to guess a secret number he was thinking of. His clues are as follows: if you subtract 12 from my number

and multiply the difference by -3 the result is -54. What is Pete´s number?
Mathematics
1 answer:
MAVERICK [17]3 years ago
4 0

Answer:

-6

Step-by-step explanation:

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A shop advertises 20% off its prices in a sale.
sdas [7]

Answer:

£45

Step-by-step explanation:

Say the original price is x. When we take 20% off, that's basically multiplying x by 20% and then subtracting that product from the original price, which is x:

x - 20% * x = 80% * x = 0.8x

Now, this equals £36, so we just set them equal:

0.8x = 36

Dividing by 0.8 from both sides, we get:

x = £45

Thus, the answer is £45.

6 0
3 years ago
Read 2 more answers
NEED HELP ASAP, WILL GIVE BRAINLIEST
Stella [2.4K]

Given:

The equation of circle is

(x+3)^2+y^2=9

To find:

The polar form of given circle.

Solution:

We have,

(x+3)^2+y^2=9

x^2+2(x)(3)+(3)^2+y^2=9        [\because (a+b)^2=a^2+2ab+b^2]

(x^2+y^2)+6x+9=9

Subtracting 9 from both sides, we get

(x^2+y^2)+6x=0

We know that, x^2+y^2=r^2 and x=r\cos \theta.

r^2+6(r\cos \theta)=0

r(r+6\cos \theta)=0

r=0 and r+6\cos \theta=0

We know that, r is radius it cannot be 0. So,

r+6\cos \theta=0

r=-6\cos \theta

Therefore, the correct option is A.

4 0
3 years ago
Please help me asap I will extra points show work it is surface area of prisms thank you
lutik1710 [3]
Okay, the easiest way (I personally) find surface area is to find the area of each face [L x W (OR H)] and then add all of the areas together.


Question 1)  The Area of 1 of the faces is 4, because 2 x 2 is 4. 
Since there is 6 faces, do 6 times 4, or 24^{2} feet in total.

5 0
3 years ago
Read 2 more answers
Find sinx given cos2x=5/9
Diano4ka-milaya [45]

Answer:

sinx = √2/3

Step-by-step explanation:

cos2x = 1-2sin²x

5/9 = 1-2sin²x

2sin²x =1-5/9

2sin²x = 4/9

sin²x = (4/9)/2

sin²x = (4/9)*(1/2)

sin²x = 2/9

sinx = √2/3

8 0
3 years ago
The length of a rectangle is 5 cm more than the width. The perimeter is 38 cm. Find the width.
Temka [501]

Answer:58

Step-by-step explanation:

Answer 58

8 0
3 years ago
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