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3 years ago

Helppp me plzzzzzzz i am no god at the maths

Mathematics

2 answers:

denpristay [2]3 years ago

7 0

Answer:

i beleive its n-6

Step-by-step explanation:

MAVERICK [17]3 years ago

5 0

I think n-6 but i’m not sure:(

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Ben, an experienced kayaker, can paddle his kayak at the constant rate of k miles per hour there is no current in the water. Whe

LenaWriter [7]

Answer: follow me on tiktok @420.nate

Step-by-step explanation:

3 0

4 years ago

Manufacture of a certain component requires three different machining operations. Machining time for each operation has a normal

faust18 [17]

Answer:

The probability is $P(X \le 70) = 0.9685$

Step-by-step explanation:

From the question we are told that

The mean values is $M_1 = 15 \ minutes , \ M_2 = 30\ minutes, \ M_3 = 20 \ minutes$

The standard deviation is $\sigma_1 = 1 \ minutes , \ \sigma_2 = 2 \ minutes , \ \sigma = 1.5 \ minutes$

Generally the total mean is mathematically represented as

$\= x = \sum M_i$

=> $\= x = 15 + 30 + 20$

=> $\= x = 65$

Generally the total variance is mathematically represented as

$V(x) = \sum \sigma^2_i$

=> $V(x) = 2^2 + 1^2 + 1.5^2$

=> $V(x) = 7.25$

Generally the total standard deviation is mathematically represented as

$\sigma = \sqrt{V(x)}$

=> $\sigma = \sqrt{7.25 }$

=> $\sigma = 2.69$

Generally the probability that it takes at most 70 min of machining time to produce a randomly selected component is mathematically represented as

$P(X \le 70) = 1 - P( X > 70 )$

Here $P(X > 70) = P(\frac{X - \mu }{\sigma} > \frac{70 - 65}{ 2.69} )$

$\frac{X -\mu}{\sigma } = Z (The \ standardized \ value\ of \ X )$

$P(X > 70) = P(Z > 1.8587 )$

From the z table

The area under the normal curve to the right corresponding to 1.8587 is

$P(Z > 1.8587 ) = 0.031535$

$P(X \le 70) = 1 - 0.031535$

=> $P(X \le 70) = 0.9685$

7 0

3 years ago

The surface area of this cube is 864 square yards. What is the value of q?

earnstyle [38]

Answer:

Volume

512

cubic feet

Explanation:

A cube has

faces all with equal area.

If the total surface area of the cube is

384

sq.ft.

then each face has an area of

384

sq.ft.

Each face of a cube is a square and if we denote the length of an edge as

then the area of a face (in this case

sq.ft.) is equal to

XXX

sq.ft.

XXX

→

sq.ft.

The volume of a cube with edges of length

In this case

Volume

512

sq.ft.

Hope i helped

4 0

3 years ago

Find the values of c such that the area of the region bounded by the parabola

KATRIN_1 [288]

<u>Solution-</u>

The two parabolas are,

$y=16x^2-c^2 \ and \ y=c^2-16x^2$

By solving the above two equations we calculate where the two parabolas meet,

$So \ 16x^2-c^2 = c^2-16x^2 \Rightarrow 32x^2=2c^2 \Rightarrow x=\frac{1}{4}c$

Given the symmetry, the area bounded by the two parabolas is twice the area bounded by either parabola with the x-axis.

$\therefore Area=2\int_{-c}^{c}y.dx= 2\int_{-c}^{c}(16x^2-c^2).dx\\=2[\frac{16}{3}x^3-c^2x]_{-c}^{ \ c}=2[(\frac{16}{3}c^3-c^3)-(-\frac{16}{3}c^3+c^3)]=2[\frac{32}{3}c^3-2c^3]=2(\frac{26c^3}{3})\\=\frac{52c^3}{3}$

$So \frac{52c^3}{3}=\frac{250}{3}\Rightarrow c=\sqrt[3]{\frac{250}{52}}=1.68$

5 0

4 years ago

A rental car company charges a one time fee of $50 plus

Nady [450]

They can be the same price at 40 miles because 50+1(40) is 90 and 10+2(40) is 90

6 0

3 years ago

Read 2 more answers