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Serga [27]
4 years ago
7

Solve -2x-y=1 y=3x-1

Mathematics
1 answer:
Brilliant_brown [7]4 years ago
4 0

Answer:

x=-2/5

y=-1/5

Step-by-step explanation:

-2x-y=1\\y=3x-1

Get the y variables onto 1 side

y+1=-2x\\y=3x-1

Now shift the 1 over

y=-2x-1\\y=3x-1

To solve for x, we can subtract the second equation from the first equation

(y-y)=-2x-3x-1-1 = 0=-5x-2\\5x=-2\\x=-2/5

Plug back into the first equation we found and solve for y

y=-2x-1\\y=-2(-2/5)-1\\y=4/5-1=-1/5

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Sonja [21]
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4 0
3 years ago
Engage and Persevere The measure of ∠A in △ABC is twice the measure of ∠B , and the measure of ∠C is 20° less than the measure o
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Answer:

A = 100

B = 50

C = 30

Step-by-step explanation:

You can make this equation to solve:

2x+x+x-20=180

4x-20=180

   +20  +20

4x=200

divide both sides by 4

200/4 = 50

x=50, B = x = 50

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6 0
2 years ago
Point B is at (4,-16).Where is B prime after a dilation with a scale factor of 3/4
torisob [31]
(4,-16) factor 3/4
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5 0
3 years ago
2. In two tosses of a fair die, what is the probability that:
zaharov [31]

Answer:

Step-by-step explanation:

The outcomes table is shown in the attached diagram. From the table, the total number of outcomes is 36.

i) the number of outcomes whose sum is 7 are 6 (1,6 2,5 3,4 4,3 5,2 6,1)

The probability that the sum of the two numbers that show up is 7 is

6/36 = 1/6

ii) the number of outcomes whose sum is even are 18

The probability that the sum of the two numbers that show up is even is

18/36 = 1/2

ii) the number of outcomes whose sum is greater than 9 is 6(4,6 5,5 6,4 5,6 6,5 6,6)

The probability that the sum of the two numbers that show up is greater than 9 is

6/36 = 1/6

3) this is a poisson distribution. We want to determine the mean.

Mean = np

p = 5/200 = 0.025

n = 600

Therefore,

Mean = 0.025 × 600 = 15 eggs

15 eggs are expected to be broken from a crate containing 600 eggs

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3 years ago
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Oksana_A [137]

Step-by-step explanation:

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