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2 years ago

19. Matt has already sold $72 worth of tickets to the

Mathematics

1 answer:

natulia [17]2 years ago

5 0

Answer: This is a function, since it's considered to be able to be made into a word problem

Step-by-step explanation:

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Find the solution set of the following quadratic equations using the quadratic formula.

oksian1 [2.3K]

Answer:

<h3> 1) $x_1=\dfrac{7+\sqrt{13}}2\,,\quad x_2=\dfrac{7-\sqrt{13}}2$ </h3><h3> 2) $x_1=-\dfrac13\,,\quad x_2=-3$ </h3>

Step-by-step explanation:

$x^2 - 7x + 9 = 0\quad\implies\quad a=1\,,\ b = -7\,,\ c=9\\\\x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}=\dfrac{-(-7)\pm\sqrt{(-7)^2-4\cdot1\cdot9}}{2\cdot1}=\dfrac{7\pm\sqrt{49-36}}2\\\\x_1=\dfrac{7+\sqrt{13}}2\,,\quad x_2=\dfrac{7-\sqrt{13}}2$

<h3>2)</h3><h3> $3x^2 + 10x=-3\\\\3x^2+10x+3=0\quad\implies\quad a=3\,,\ b =10\,,\ c=3\\\\x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}=\dfrac{-10\pm\sqrt{10^2-4\cdot3\cdot3}}{2\cdot3}= \dfrac{-10\pm\sqrt{100-36}}6\\\\x_1=\dfrac{-10+\sqrt{64}}6=\dfrac{-10+8}6=-\dfrac13\,,\qquad x_2=\dfrac{-10-8}6=-3$ </h3>

7 0

3 years ago

Help me out a little

konstantin123 [22]

I believe your answer is (1,5)

I graphed the equations and the ordered pairs and (1,5) is the only point that fell on both of the shaded areas.

hope this helps !!

8 0

2 years ago

I really need help and I'm really struggling

larisa [96]

Firstly you can do 8 x 41 = 328.
Then 6 x 19 = 114,
114 + 328 = 442^2.

Hope this helps.

6 0

3 years ago

What’s the ratio to 2 to 3

ozzi

Answer:

2/3 2:3 2 to 3

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Someonepleasehelp me asap <br>evaluate (8)-2(15-8)

AnnZ [28]

Answer:

-6

Step-by-step explanation:

You have to multiple -2 by 15 and -8 separately

8 - 2(15-8)

8 -30 + 16

24-30 = -6

4 0

3 years ago