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4 years ago

I’m so sorry when I asked my question before the picture didn’t load so here is what I needed help with. So sorry

Mathematics

1 answer:

goldfiish [28.3K]4 years ago

6 0

Answer: 3.75

Step-by-step explanation:

Hope this helps

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15 cm<br> 4 cm<br> cm<br> V=____cm3

bonufazy [111]

Answer:

V=(πr^2 x h)/3

lets use π as 3.14 cause I dont know what pi u using

3.14 x 4^2 x 15 = 753.6/3 = 251.2

If you're using π as your pi, than just replace 3.14 by π on calculator

Hope that answers your question

8 0

3 years ago

X2 + y2 = 9<br> x + y = 2

Sergeu [11.5K]

Answer:

I think its 4,5. Not entirely sure but it makes sense

8 0

3 years ago

Which expression represents the sum of ( 2x-5y) and (x+y)?

nekit [7.7K]

Sum of ( 2x-5y) and (x+y)?
=2x-5y+x+y
=3x-4y

6 0

4 years ago

The length of a rectangle is 3 m more than twice the width, and the area of the rectangle is 54 mº. Find the dimensions of the r

zhenek [66]

Answer:

The dimensions of rectangle are 12 m and 4.5 m

Step-by-step explanation:

Given that, The length of a rectangle is 3 m more than twice the width, and the area of the rectangle is 54 m²

Let's assume width of rectangle be x m and length be 3 + 2x m respectively. To find the dimensions of the rectangle we will use the formula of Perimeter of rectangle

$\\ { \underline{ \boxed{ \pmb{ \sf{ \purple{Area _{(rectangle)} = Length × width}}}}}} \\ \\$

Substituting values in above formula:

$\\ \dashrightarrow \sf \: \: (3 + 2x)(x) = 54 \\$

$\dashrightarrow \sf \: \: 3x + 2x^2 = 54 \\$

$\dashrightarrow \sf \: \: - 54 + 3x + 2x^2 = 0 \\$

$\dashrightarrow \sf \: \: 2x^2 + 3x - 54 = 0\\$

$\dashrightarrow \sf \: \: 2x^2 + 12x - 9x - 54 = 0\:$

$\dashrightarrow \sf \: \: 2x(x + 6) -9(x + 6) = 0\\$

$\dashrightarrow \sf \: \: (2x -9)(x+6) = 0 \\$

$\sf{x=}{\sf{\dfrac{9}{2}}}{\sf{\: or\: -6}}$

$\dashrightarrow \: \: { \underline{ \boxed{ \pmb{ \sf{\purple{ x = 4.5 }}}}}}$

Hence,

Length of rectangle = 3 + 2x = 3 + 2(4.5) = 12 m
Width of the rectangle = x = 4.5m

$\\ { \underline{ \pmb{ \frak{ \therefore Length \: and \: width \: of \: the \: rectangle \: is \:12 \: m \: and \: 4.5 \: m}}}} \\$

5 0

2 years ago

Read 2 more answers

What is the square root of -1?

Mice21 [21]

Answer:

the square root of -1 is actually "i"

Step-by-step explana

3 0

4 years ago

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