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2 years ago

Please please pleaseee help me on this :) it would be amazing

Mathematics

1 answer:

Semenov [28]2 years ago

3 0

Answer:

Turn off battery supply → The electromagnet turns off.

Place a magnet care inside the coil of wire → The strength of the electromagnet increases.

Change the direction in which the current flows → The poles of the electromagnet reverses

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What is the hcf of 20 and 25

fomenos

The answer is 5. The only factors are 1 and 5, and 5 is the highest.

6 0

2 years ago

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Subtract 3 1/2 from 5 1/3

AleksAgata [21]

Answer:

11/6

Step-by-step explanation:

16/3 - 7/2 = 16/3 x 2/2 - 7/2 x 3/3 = 32/6 - 21/6 = 32-21/6 = 11/6

8 0

3 years ago

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Need help on this math question!!!

gavmur [86]

Answer:

s = 10w

Step-by-step explanation:

We can find the equation in slope-intercept form which is y = mx + b. The variables mean:

"b" - for the y-intercept (where the graph hits the y-axis)

"m" - for the slope (how steep the line is)

"x" and "y" - coordinates that satisfy the equation (points on the line)

From the graph, we can see that the y-intercept is 0. b = 0, therefore we do not need to write it in the equation.

To find the slope, "m", use the equation $m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}$ . To use it, substitute the coordinates for two points. Using the diagram, choose a point 1 and a point 2.

Point 1 (0, 0) x₁ = 0 y₁ = 0

Point 2 (1, 10) x₂ = 1 y₂ = 10

$m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}$ Substitute values

$m = \frac{10-0}{1-0}$ Subtract to simplify

$m = \frac{10}{1}$ Simplify the fraction

m = 10 Slope of the line

Since we know "m" and "b", we can write the equation:

y = mx + b

y = 10x + 0

y = 10x

We are not using "x" and "y" in this case. Change them according to the question.

x => w

y => s

y = 10x => s = 10w

5 0

2 years ago

Korie randomly selects a number from the numbers shown below. 54, 60, 11, 0, 5, 7, 20 What is the probability that the number sh

grandymaker [24]

Answer:

there is a greater chance that she selects a even number because there are 4 even numbers and 3 odd numbers

8 0

2 years ago

Engineers must consider the breadths of male heads when designing helmets. The company researchers have determined that the popu

tia_tia [17]

Answer:

The minimum head breadth that will fit the clientele is 4.4 inches.

The maximum head breadth that will fit the clientele is 7.8 inches.

Step-by-step explanation:

Let X = head breadths of men that is considered for the helmets.

The random variable X is normally distributed with mean, μ = 6.1 and standard deviation, σ = 1.

To compute the probability of a normal distribution we first need to convert the raw scores to z-scores using the formula:

$z=\frac{x-\mu}{\sigma}$

It is provided that the helmets will be designed to fit all men except those with head breadths that are in the smallest 4.3% or largest 4.3%.

Compute the minimum head breadth that will fit the clientele as follows:

P (X < x) = 0.043

⇒ P (Z < z) = 0.043

The value of z for this probability is:

z = -1.717

*Use a z-table.

Compute the value of x as follows:

$z=\frac{x-\mu}{\sigma}\\-1.717=\frac{x-6.1}{1}\\x=6.1-(1.717\times 1)\\x=4.383\\x\approx4.4$

Thus, the minimum head breadth that will fit the clientele is 4.4 inches.

Compute the maximum head breadth that will fit the clientele as follows:

P (X > x) = 0.043

⇒ P (Z > z) = 0.043

⇒ P (Z < z) = 1 - 0.043

⇒ P (Z < z) = 0.957

The value of z for this probability is:

z = 1.717

*Use a z-table.

Compute the value of x as follows:

$z=\frac{x-\mu}{\sigma}\\1.717=\frac{x-6.1}{1}\\x=6.1+(1.717\times 1)\\x=7.817\\x\approx7.8$

Thus, the maximum head breadth that will fit the clientele is 7.8 inches.

5 0

3 years ago