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3 years ago

Find the slope for these equations y=-5(2x-3) 10y+6x=-90 12y -4x=-24

2 answers:

8 0

1. y = -5 (2x - 3) x-intercept = (3/2 , 0) 1. 0 = -5 (2 * 3/2 - 3)
y-intercept= (0 , 15)

2. 10y + 6x = -90 x-intercept= (-15 , 0)
y-intercept= (0 , -9) 2. 10 * 0 + 6 * -15 = -90

3. 12y - 4x = -24 x-intercept= (6 , 0)
y-intercept= (0 , -2) 3. 12 * 0 - 4 * 6 = -24

slope 1. -10

slope 2. -3/5

slope 3. 1/3

AleksAgata [21]3 years ago

5 0

1) 2x 2) 6x 3) -4 There you go

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I need help with 25.

noname [10]

Sum of linear pair of angles = 180°

<EFG + <GFH = 180°

2n + 21 + 4n + 15 = 180°

6n + 36 = 180°

6n = 144

n = 24

<EFG = 2(24) + 21 = 69°

<GFH = 4n + 15 = 4(24) + 15 = 111°

6 0

3 years ago

A test is used to assess readiness for college. In a recent year, the mean test score was 20.3 and the standard deviation was 4

Vlada [557]

Answer:

$\mu = 20.3$

$\sigma = 4.9$

And we can find the limits in order to consider values as significantly low and high like this:

$Low\leq \mu -2 \sigma= 20.3- 2*4.9 = 10.5$

$High\geq \mu +2 \sigma= 20.3+ 2*4.9 = 30.1$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Solution to the problem

For this case we can consider a value to be significantly low if we have that the z score is lower or equal to - 2 and we can consider a value to be significantly high if its z score is higher tor equal to 2.

For this case we have the mean and the deviation given:

$\mu = 20.3$

$\sigma = 4.9$

And we can find the limits in order to consider values as significantly low and high like this:

$Low \leq \mu -2 \sigma= 20.3- 2*4.9 = 10.5$

$High\geq \mu +2 \sigma= 20.3+ 2*4.9 = 30.1$

6 0

3 years ago

A salesman's commission on 150,000 sale is 3000. what is the percent?

fomenos

The percentage is 98%.

You can find this by multiplying 98% (0.98) and 150,000 to get 147,000. Then subtract 147,000 from 150,000 to get 3,000.

I hope this helps!

8 0

3 years ago

Find the obtuse angle the line y-2x=7 makes with the x- axis

Kazeer [188]

In analytical geometry, there are already derived equations to find the distance of lines and points as well as the angle made between two lines. As special case is when the other line is one of the coordinate axis. Then, the formula can be simplified to

tan θ =m, where m is the slope of the equation

In the next step, we also incorporate operations of calculus. Since the slope is equal to Δy/Δx, this is equivalent to dy/dx in calculus. Therefore, you can find the slope by differentiating the equation in terms of x.

<span>y-2x=7
y = 2x+7
dy/dx = 2 =m

So,

tan </span>θ = 2
θ = tan⁻¹(2)
θ = 63.43°

5 0

3 years ago

Please answer !!!!!!!!!!!!!!!!!!!!!!

rewona [7]

Answer:

umm iI not sure but i think it is

Step-by-step explanation:

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2 years ago