3 years ago

Can someone help me? I'll reward points + brainalist

Mathematics

1 answer:

NeX [460]3 years ago

5 0

The answer for the following question is 12

Circumference of the circle = 2TTr

= 2 x 22/7 x 12

= 44 / 7 x 12

= 75.4285714286

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4. Calculate the product of 8/15, 645, and 1/3.<br> A. 48/15<br> B. 48/30<br> C. 16/75<br> D. 18/15

DaniilM [7]

Answer:

645.866 or 646

Step-by-step explanation:

645.866 is the sum of 8/15+ 645/1 +1/3

1/3 = 0.333 + 8/15 = 0.533 = 0.866

645+ 0.866= 645.866

If we are asked to round these to units

we have 646

3 0

3 years ago

How do you simplify 52/45

rewona [7]

Answer:

1 (7/45)

Step-by-step explanation:

you'll see how many 45 can go into 52. Only 1 45 can fit into 52 with some leftover.

so to find the left over numbers you'll subtract 45 from 52= 7

so 7/45 is left over

5 0

3 years ago

Read 2 more answers

Triangles A and B have vertical heights x cm and (x+3) cm respectively. The areas of Triangles A and B are 30cm² and 32cm² respe

PolarNik [594]

Answer:

Hi,

Step-by-step explanation:

Let say a the base of the triangle A and b the base of the triangle B.

$a)\\\left\{\begin{array}{ccc}\dfrac{a*x}{2}&=&30\\\dfrac{b*(x+3)}{2}&=&32\\b=a-4\\\end{arraqy}\right.\\\\(i): a=\dfrac{60}{x}\\\\(ii): b=\dfrac{64}{x+3}\\\\b)\\\dfrac{64}{x+3}=\dfrac{60}{x}-4\\\\64x=(60-4x)*(x+3)\\\\4x^2+16x-180=0\\\\x^2+4x-45=0\\\\\Delta=16+4*45=196=14^2\\x=\dfrac{-4+14}{2}=5\ or\ x=\dfrac{-4-14}{2}=-9\ (impossible)\\So\ x=5,\ a=\dfrac{60}{5}=12, b=\dfrac{64}{5+3}=8\\\\Area\ of\ A=12*5/2=30\\Area\ of\ B=8*8/2=32\\\\Height\ of\ triangle\ B=x+3=5+3=8.\\$