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3 years ago

How do we do with this formula? Help me with A pls

Mathematics

2 answers:

Masteriza [31]3 years ago

8 0

Answer:

find all the equation placing each one

Step-by-step explanation:

for eg in no a

gradient is 2

point is (4,1)

so the point (4,1) is (x1,y1)

using formula

y-y1=m(x-x1)

y-1=2(x-4)

y-1=2x-8

therefore 2x-y-7=0 is the required equation

now do all of the above like this

Ugo [173]3 years ago

3 0

Gradient is the slope, which is the letter m in the equation.

The point is written as (x1, y1) so replace x1 and y1 in the equation with the numbers in the given point.

A would be y - 1= 2(x-4)

B: y +5 = 5(x-2)

C: y-1= -3(x+1)

D: y -6 = 1/2(x-1)

E: y +1/4 = -2(x-3:4)

F: y+7 = -1/5(x+ 3)

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Janna jumped 156in in the long jump competition at the high school track meet . How many feet did Janna jump

Triss [41]

To find the number of feet she jumped you have to divide 156 by 12 because there are 12 inches in a foot

So 156/12 =13
So she jumped 13 feet

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4 years ago

Thetime(inhours)requiredtorepairamachineis an exponentially distributed random variable with parameter λ = 1 . What is 2 (a) the

mihalych1998 [28]

Answer:

a) 0.1353

b) 0.3679

Step-by-step explanation:

Let's start by defining the random variable T.

T : ''The time (in hours) required to repair a machine''

T ~ exp (λ)

T ~ exp (1)

The probability density function for the exponential distribution is

(In the equation I replaced λ = L)

$f(x)=Le^{-Lx}$

With L > 0 and x ≥ 0

In this exercise λ = 1 ⇒

$f(x)=e^{-x}$

For a)

$P(T>2)$

$P(T>2)=1-P(T\leq 2)$

$P(T>2)=1-\int\limits^2_0 {e^{-x} } \, dx$

$P(T>2)=1-(-e^{-2}+1)$

$P(T>2)=e^{-2}=0.1353$

For b)

$P(T\geq 10/T>9)$

The event (T ≥ 10 / T > 9) is equivalent to the event T ≥ 1 so they have the same probability of occur

$P(T\geq 10/T>9)=P(T\geq 1)$

$P(T\geq 1)=1-P(T$

$P(T\geq 1)=1-(-e^{-1}+1)=e^{-1}=0.3679$

4 0

3 years ago

I need help solving this problem

Ludmilka [50]

G(f(2)) means work out whatever f(2) is then plug this into g(x).

So f(2) is 3 because we just find the x-value 2 in the left hand column and read across. This is 3.

So then we find g(3) by finding the x-value 3 in the left hand column and read across. This is 10.

So g(f(2)) = 10

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4 years ago

Factor the trinomial comoletley x2+5x-84

Annette [7]

Hope this helps you.

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3 years ago

What does (0.6) squired 2 equal

wlad13 [49]

Answer:

.36

Step-by-step explanation:

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2 years ago

How do we do with this formula? Help me with A pls​

How do we do with this formula? Help me with A pls