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3 years ago

2x + 8y = 6 -5x - 20y = -15

Mathematics

1 answer:

kodGreya [7K]3 years ago

7 0

Answer:

The total would be 40.53

Solve for the first variable in one of the equations, then substitute the result into the other equation.

x = 3 − 4 y

Step-by-step explanation:

This question is incomplete so

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Diameter = 3 feet circumference =?

Alex_Xolod [135]

Please learn the equation

Circumference = π*d

Therefore C = π*3
so C = 9.42ft

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4 years ago

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The probability distribution for the number of goals the Lions soccer team makes per game is given below.

UkoKoshka [18]

Answer:

The correct answer is:

(A) 0.55

Step-by-step explanation:

This probability distribution means that we have these following probabilities:

$P(X = 0) = 0.05$

$P(X = 1) = 0.15$

$P(X = 2) = 0.35$

$P(X = 3) = 0.30$

$P(X = 4) = 0.15$

What is the probability that in a given game the Lions do not score more than 2 goals?

This is the following probability.

$P = P(X = 0) + P(X = 1) + P(X = 2)$

$P = 0.05 + 0.15 + 0.35$

$P = 0.55$

The correct answer is:

(A) 0.55

3 0

3 years ago

PLEASE PLEASE HELP AND I NEED YOU TO DO IT FAST BECAUSE I HAVE TO GO SOON

Greeley [361]

The height is modelled by the equation:

$h(t)=-0.2t^2+2t$

Therefore

$\begin{gathered} \text{ } \\ \frac{\text{ dh}}{\text{ dt}}=-0.4t+2 \end{gathered}$

At the maximum height dh/dt = 0:

Hence,

$\begin{gathered} -0.4t+2=0 \\ -0.4t=-2 \\ \text{ Dividing both sides by -0.4} \end{gathered}$ $\begin{gathered} \frac{-0.4t}{-0.4}=\frac{-2}{-0.4} \\ t=5 \end{gathered}$

Hence, the ball gets to the maximum height after 5s.

The maximum height is given by h(5):

$h(5)=-0.2(5)^2+2(5)=5$

Therefore, the maximum height is 5 ft.

When the ball reaches the ground h(t) = 0:

$\begin{gathered} -0.2t^2+2t=0 \\ \text{ Dividing both sides by -0.2, we have:} \\ t^2-10t=0 \\ Factorising\text{ the left hand side, we have} \\ t(t-10)=0 \\ \text{ Therefore,} \\ t=0,\text{ t=10} \end{gathered}$

The ball reaches the ground in 10s

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1 year ago

Question 9 (4 points)

stiv31 [10]

Answer:

x = 4.8

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below :)

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4 years ago

What number is 1/10 of 451.8

dsp73

Answer:

45.18

Step-by-step explanation:

to find one tenth (1/10) of a number, divide that number by 10

451.8 divided by 10 is

45.18

hope this helps :)

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3 years ago

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