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3 years ago

Y=x+2 y=-x +8 What is the solution for this system of equations?

Mathematics

1 answer:

Zinaida [17]3 years ago

6 0

Answer:

x = 3 y = 5

Step-by-step explanation:

y=x+2

+ y=-x +8

2y = 10

y = 5

y = -x + 8

5 = -x + 8

x = 3

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3 years ago

4. If DF = 9x - 39, find EF. Help I’m so confused!!!!

topjm [15]

Answer:

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Step-by-step explanation:

from the illustration,

EF =DF - DE

given that DF =9x-39 , DE =47 EF=3x +10

substitute them into the formula,

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solving for x

3x +10 =9x -86

grouping like terms

3x - 9x =-86 -10

-6x=-96

dividing through by -6

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3 years ago

If a coin is flipped 75 times, in how many ways could there be exactly two tails?

Dimas [21]

Answer:

2775 ways

Step-by-step explanation:

We have been given the case to choose exactly two tails when flipped 75 times means $^{75}C_2$

Since, $^nC_r$ is equal to $\frac{n!}{r!\cdot(n-r)!}$

Here n =75, r=2 substituting the values we will get

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3 years ago

Y=x+2 y=-x +8 What is the solution for this system of equations?​

Y=x+2 y=-x +8 What is the solution for this system of equations?