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3 years ago

15 points if you know how to show a picture of where i need to place the points/line that would be very much appreciated

Mathematics

1 answer:

wel3 years ago

3 0

Hello

this equation is slope formula y=mx+b the m is x and b is Y so if it is saying 5/3 for x you use rise over run so i would be up 5 and over three and repeat that to make a line and the -4 is representing where your line should cross over the y axis

hope this helps

plz mark me as brainliest

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The information given represents lengths of sides of a right triangle with c the hypotenuse. Find the correct missing length to

klasskru [66]

A² = c² - b²
a² = 21² - 13 ²
a² = 441 - 169
a² = 272
a = √272 = 16.49242 ≈ 16.49
Answer : D ) 16.49

5 0

2 years ago

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Is 0.007 x 10 equivalent to 0.07

Pachacha [2.7K]

Yes they are equivalent because when you multiply by 10, you move the decimal place one spot to the right.

5 0

3 years ago

Help please I needed!!!!

faust18 [17]

Answer:

Step-by-step explanation:

4. f(x) = √(x + 4)

f(5) = √(5+4) = √(9) = 3

5. g(x) = x^12 - x^5

g(-1)= (-1)^12 - (-1)^5

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3 0

2 years ago

find the x-intercepts and the coordinates of the vertex for the parabola Y equals negative X squared plus 8X -12. If there’s mor

Oksanka [162]

Answer:

x = 2, and 6

x = 2 , 6

Step-by-step explanation:

The quadratic function to analyze is: $y = -x^2+8x-12$

In order to find where the corresponding parabola intercepts the x axis, we set it equal to zero (y = 0):

$y = -x^2+8x-12\\0 = -x^2+8x-12\\x^2-8x+12=0$

This equation is easy to solve by factoring. We look for a air of integer numbers whose product equals the constant term "12", and whose combinig renders the coefficient of the middle term of the trinomial "-8".

The two such numbers are "-2" and "-6". We use them to split the middle term, and then solve by factoring by grouping:

$x^2-8x+12=0\\x^2-2x-6x+12=0\\(x^2-2x)+(-6x+12)=0\\x(x-2)-6(x-2)=0\\(x-2)(x-6)=0$

For the product of two factors to render zero, we need either one to be a zero.This means that (x-2)=0 (that is x = 2), or (x-6)=0 (that is x = 6).

So, there are two x-intercepts: x= 2, and 6

3 0

2 years ago

A screening test wished to improve the diagnostic ability to identify Zika-infected fetuses in pregnancy rather than after birth

12345 [234]

Answer:

Sensitivity = 66.7% (C)

specificity= 98.0% (E)

positive predictive value = 80.0% (F)

Negative predictive value = 96.0% (D)

accuracy of the test = 94.5% (A)

Step-by-step explanation:

Given the data in the question;

Disease Present Disease Absent Total

Test Positive 24 6 30

Test Negative 12 288 300

Total 36 294 330

so A = 24, B = 6, C = 12 and D = 288

sensitivity = [A/(A+C)]×100 = [24/(24+12)]×100 = [24/36]×100

Sensitivity = 66.7% (C)

specificity= [D/(D+B)]×100 = [288/(288+6)]×100 = [288/294]×100

specificity= 98.0% (E)

positive predictive value = [A/(A+B)]×100 = [24/(24+6)]×100

= [24/30]×100

positive predictive value = 80.0% (F)

Negative predictive value = [D/(D+C)]×100 = [288/(288+12)]×100

= [288/300]×100

Negative predictive value = 96.0% (D)

accuracy of the test = [A+D/(A+B+C+D)]×100 = [24+288/(24+6+12+288)]×100

= [312/330]×100

accuracy of the test = 94.5% (A)

Nothing 33.3% (B)

6 0

2 years ago