3 years ago

4. How many real-number solutions does the equation have?

1 answer:

5 0

2 solutions. This is because the parabola will cross the x axis twice. We know this because -5 means the vertex will be 5 units below the x axis. and the parabola opens upwards because the first coefficient is positive. Hope this helped :)

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Find<br> an irrational number for the square if 20

JulijaS [17]

Answer:

irrational, not a perfect square.

Step-by-step explanation:

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1 year ago

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Father is 20 years older than son. if the sum of their ages is 40 years find their age

sweet-ann [11.9K]

Answer:

20 is the father's 20 is the son

Step-by-step explanation:

20+20=40

40/2=20

40-20=20

another way:

20:n= 40

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20:20=40

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<img src="https://tex.z-dn.net/?f=n%20%7B%20%7D%5E%7B2%7D%20%20%2B%206n%20%2B%205" id="TexFormula1" title="n { }^{2} + 6n + 5"

Anastasy [175]

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Step-by-step explanation:

1. Write 6n as a sum

2. Factor out n form the expression

3. Factor out n+5 from the expression

(n+5)x(n+1)

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2 years ago

Evaluate the expression below at x= 4.

Gre4nikov [31]

Suggestion:

Try to explain this more clearly.

Why you should try my suggestion:

Because it will help others so they understand what your question is.

My note:

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Solve for x: −3|2x + 6| = −12

spayn [35]

Start with

$-3|2x+6|=-12$

Divide both sides by -3

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$2x+6=-4 \iff 2x=-10 \iff x=-5$

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