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kozerog [31]
3 years ago
5

Two trucks leave a factory at the same time. One travels east at 60 miles per hour, and the other travels west at 30 miles per h

our. In how many hours will they be 150 miles apart? A 1-2/3 hours B 2 hours C 2-1/2 hours D 5 hours ​
Mathematics
1 answer:
jeyben [28]3 years ago
3 0
A 1-2/3 hours there will be
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Find an equation with an x intercept of (-1, 0)
nataly862011 [7]
Answer:

y=x+1 :)

step by step explanation:
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3 years ago
Help Math All the Points i have
d1i1m1o1n [39]
Hey there!
We'll be writing them in slope-intercept form. Slope intercept form is defined as:
y = mx + b
With m being the slope and b as the y-intercept. Now, we can just plug them in.

1)
y = -3x - 2
Slope = -3
Y intercept = -2

2) y = 5x + 7
Slope = 5
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3) y = -3/4x + 3
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5 0
3 years ago
Let
Digiron [165]

What I gather from the question is that X has second moment E(X^2)=81 and variance V(X) = 58, and you're asked to find the expectation and variance of the random variable Y=2X+10.

From the given second moment and variance, we find the expectation of X :

V(X) = E(X^2) - E(X)^2 \implies E(X) = \sqrt{E(X^2) - V(X)} = \sqrt{23}

Expectation is linear, so

E(Y) = E(2X+10) = 2 E(X) + 10 = \boxed{2\sqrt{23} + 10}

Using the same variance identity, we have

V(Y) = V(2X+10) = E((2X+10)^2) - E(2X+10)^2

and

E((2X+10)^2) = E(4X^2 + 40X + 100) = 4E(X^2) + 40E(X) + 100 = 424 + 40\sqrt{23}

so that

V(Y) = V(2X+10) = (424 + 40\sqrt{23}) - (2\sqrt{23} + 10)^2 = \boxed{232}

Alternatively, we can use the identity

V(aX+b) = a^2 V(X) \implies V(2X+10) = 4V(X) = 232

5 0
2 years ago
Write an equation of the line
aleksandrvk [35]
Y=1/2x+1.5
hope that helps!
7 0
3 years ago
Cual es la forma más simple al efectuar la operación indicada en la expresión (-3) (-12) ?
gulaghasi [49]

Answer:

Cual es la forma más simple al efectuar la operación indicada en la expresión (-3) (-12) ?  this means What is the simplest way to perform the operation indicated in the expression (-3) (-12)?

Step-by-step explanation:

Multiply -3 by -12 and get 36. hope this was helpful.

7 0
3 years ago
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