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QveST [7]
3 years ago
11

Helppppp meeee please

Mathematics
1 answer:
tankabanditka [31]3 years ago
3 0

Answer:

x is equal to -21

Step-by-step explanation:

-21+4=-17

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Solve 2x2 + 20x = −38. (1 point)
RoseWind [281]

Answer:

The solutions are x=-5+\sqrt{6}  and x=-5-\sqrt{6}


Step-by-step explanation:

we have

2x^{2} +20x=-38

Divide by 2 both sides

x^{2} +10x=-19 ------> x^{2} +10x+19=0

we know that


The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to


x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}


in this problem we have


x^{2} +10x+19=0

so


a=1\\b=10\\c=19


substitute

x=\frac{-10(+/-)\sqrt{10^{2}-4(1)(19)}}{2(1)}


x=\frac{-10(+/-)\sqrt{100-76}}{2}


x=\frac{-10(+/-)\sqrt{24}}{2}


x=\frac{-10(+/-)2\sqrt{6}}{2}


x1=\frac{-10(+)2\sqrt{6}}{2}=-5+\sqrt{6}


x2=\frac{-10(-)2\sqrt{6}}{2}=-5-\sqrt{6}


8 0
3 years ago
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The Wilson family invited 100 relatives to their Christmas party. 90 guests had Dutch heritage, 80 had German heritage and 75 ha
nadezda [96]
The answer is 45 i am 100% sure of that!!!
8 0
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Bathing suits are on sale 80% off at Dillards. If I see a bathing suit marked down to $25, what was the original price of the ba
Svetradugi [14.3K]

Answer:

i think 20

Step-by-step explanation:

6 0
2 years ago
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The graph of the function f(x)=4/5 sqrt x is shown.<br> What is the domain of the function?
S_A_V [24]

Answer:

All real number greater than equal to zero.

Step-by-step explanation:

The function is given by

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here, the values of x should be all real number and zero also.

So, the correct option is  (d).

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The number of people contacted at each level of a phone tree can be represented by f(x) = 3x, where x represents the level.What
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Answer: The answer to this bummy  question is B

Step-by-step explanation:

6 0
3 years ago
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