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3 years ago

What is the solution of the system? y=x^2-4x+5 Y=-2+8

Mathematics

1 answer:

Nataly_w [17]3 years ago

5 0

Yea something is not right.if y=6 then you cant solve the system because you end up with x^2-4x-1

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Help me please!!!!!!!!!!!!!!!!

Sav [38]

Answer:

x=-4 and y=4

Step-by-step explanation:

(6x+9y)-(6x+7y)=12-4=8

--> 9y-7y=8

-->2y=8-->y=4

-->6x+7×4=4 -->x=-4

7 0

2 years ago

Read 2 more answers

3. The point D(3, -2) is

ExtremeBDS [4]

Answer:

D' = ( -3, -2)

Step-by-step explanation:

Rate me branliest please :)

8 0

2 years ago

Consider the probability that more than 99 out of 157 software users will not call technical support. Assume the probability tha

Rainbow [258]

Answer:

$P(x>99)= 0.468$

Step-by-step explanation:

From the question we are told that:

Sample size 157

Sample mean

$\=x =np$

$\=x =157*0.56$

$\=x = 87.92$

Generally the equation for Standard deviation is mathematically given by

$\sigma=\sqrt{npq}$

$\sigma=\sqrt{157*0.56*0.44}$

$\sigma =6.22$

Therefore

$P(x>99)=P(z>(\frac{99.5-87.92)}{6.22})$

$P(x>99)=P(z>1.86)$

$P(x>99)= 0.468$

8 0

2 years ago

Factor -4 out of -8k - 12

sammy [17]

Answer:

-4(2k + 3)

Step-by-step explanation:

Factoring is just dividing the whole thing by that

So -8k - 12 becomes -4(2k + 3)

7 0

2 years ago

Find the value of x.<br><br> Please help and can somebody tell me how to find x?

Olegator [25]

Answer:

x = 75°

Step-by-step explanation:

Sum of the interior angles of a triangle = 180°

Therefore,

78° + 27° + x° = 180°

Add like terms

105 + x = 180

105 + x - 105 = 180 - 105 (substraction property of equality)

x = 75°

4 0

2 years ago