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2 years ago

Plz help , due in 5 mins

Mathematics

1 answer:

Grace [21]2 years ago

3 0

Answer:

option a) 30 : 19

Step-by-step explanation:

$Length = 7 \frac{1}{2} = \frac{15}{2}\\\\Width = 4\frac{3}{4} = \frac{19}{4}$

Ratio of length to width:

$\frac{15}{2} : \frac{19}{4}$

$=\frac{\frac{15}{2}}{\frac{19}{4}}\\\\=\frac{15}{2 } \times \frac{4}{19}\\\\=15\times \frac{2}{19}\\\\=\frac{30}{19}\\\\30 : 19$

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This is for geometry & I need help.

KiRa [710]

Answer:

1540 cubic millimeters

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2 years ago

A solid oblique pyramid has an equilateral triangle as a base with an edge length of 4 cm and an area of 12 cm2. What is the vol

Pavel [41]

Solution:

Let me define pyramid first.A pyramid is a Polyhedron , whose base can be any polygon and it's faces are triangular which meet at a point called vertex.

Volume of Pyramid = $\frac{1}{2}\times{\text{Area of Base}\times{\text{Height}$

Side of base which is an equilateral triangle= 4 cm

Area of whole pyramid = 12 square cm

Area of Equilateral triangle having side 4 cm= $\frac{\sqrt3}{4}\times(Side)^2=\frac{\sqrt3}{4}\times(4)^2=4 \sqrt3$ cm²

So, Area of three triangle which are faces of pyramid = (12 - 4 √3)cm²

Area of triangle = $\frac{1}{2} \times (Base)\times(Height)$

12 - 4 √3= $\frac{1}{2} \times (4)\times(Height)$

Height = $\frac{12-4\sqrt3}{2}$

Height=(6-2√3) cm

Volume of pyramid = Area of Equilateral triangle which is it's Base × Height of Pyramid

=4√3 × (6-2√3) cm³

=(24 √3 -24)

= 24 (1.732-1)

=24 × 0.732

=17.568 cm³

8 0

2 years ago

Read 2 more answers

Find all solutions in the interval [0, 2π) for 2 sin^2 x = sin x

Ede4ka [16]

Answer:

Step-by-step explanation:

2 sin²x=sin x

2 sin² x-sin x=0

sin x(2 sin x-1)=0

sin x=0

x=0,π

2 sin x-1=0

2 sin x=1

sin x=1/2= sin π/6,sin (π-π/6)

x=π/6,5π/6

4 0

2 years ago

78% of all Millennials drink Starbucks coffee at least once a week. We speculate that this rate is lower among teenager in the U

Over [174]

According to the sample size, it will be necessary to approximate the data through the normal distribution and through this calculate the standard deviation to obtain both the average, the standard deviation and the obtained deviation. Here the sample size is 40.

Approximately the distribution of proportion is a Normal distribution using the CLT. the mean will be 0.78, then we have that the standard deviation is,

$\sigma = \sqrt{\frac{p(1-p)}{n}}$

$\sigma = \sqrt{\frac{(0.78)(0.22)}{40}}$

$\sigma = 0.0655$

Then the distribution will be normal with the values of 0.78 to 0.0655 for the mean and the standar deviation respectively.

Normal (0.78,0.0655)

7 0

2 years ago

Find the measure of x.

Vsevolod [243]

Answer:

The answer is 6

Step-by-step explanation:

All you have to do is take 8x-4 and then combine it with 6x+8 like this...

8x-4=6x+8.

Then you have to add 4 to 8 and you will get 12.

Then you subtract 6 from 8 and get 2. So your equation will look like this...

2x=12

Then you divide 12 by 2 and you get 6 because 6 x 2 is 12.

HOPE THIS HELPS!!!!!!

6 0

2 years ago

Plz help , due in 5 mins ​

Plz help , due in 5 mins