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-Dominant- [34]

2 years ago

12

At 2 pm on Tuesday, the temperature was -12 degrees. By 6 pm the temperature had dropped to -20 degrees. What was the average ch

ange in temperature each hour?

1 answer:

fiasKO [112]2 years ago

6 0

Answer:

a

Step-by-step explanation:

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Use the distributive property to write an equivalent expression: 5(3x + 2)

LenKa [72]

Answer:

15x + 10

Step-by-step explanation:

5(3x + 2)

15x + 10

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3 years ago

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Which are the solutions of x2 = 19x + 1?

Finger [1]

Answer:

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

Step-by-step explanation:

we have

$x^2=19x+1$

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-x^{2}-19x-1=0$

so

$a=1\\b=-19\\c=-1$

substitute in the formula

$x=\frac{-(-19)\pm\sqrt{-19^{2}-4(1)(-1)}} {2(1)}$

$x=\frac{19\pm\sqrt{365}} {2}$

$x=\frac{19+\sqrt{365}} {2}$

$x=\frac{19-\sqrt{365}} {2}$

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

therefore

StartFraction 19 minus StartRoot 365 EndRoot Over 2 EndFraction comma StartFraction 19 + StartRoot 365 EndRoot Over 2 EndFraction

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3 years ago

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Which of the following are examples of inferential statistics?

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Testing random samples of lightbulbs produced by a company to confirm they work and testing a new drug on a random sample of patients to see how effective it is at curing the flu are examples of inferential statistics. The correct option among all the options that are given in the question are option "C" and option "E".

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Frazer is training for a cycle race. In the first week he cycles 195 miles

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3 years ago

Which algebraic represent 15 less than x divided by 9

polet [3.4K]

X/9 - 15
X divided ( / ) by 9 minus ( - ) 9

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