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3 years ago

Solve the quadratic function by completing the square. What are the missing pieces in the steps? -32=2(x^2+10)

Mathematics

2 answers:

pychu [463]3 years ago

7 0

-32+50 =2(x^2+10x+25)
18=2(x+5)^2
9= (x+5)^2
+- 3 = x+5
x= -2 or x= -8

Anni [7]3 years ago

3 0

Answer:

50, 3 and, -8 are the right answer the 3 is positive

Step-by-step explanation:

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Rico eats 1/9 of the lasagna, and his friend eats 1/18 of the lasagna. How much of the lasagna is left?

sweet-ann [11.9K]

1/9+1/18=1/6 6/6-1/6=5/6 =5/6

4 0

4 years ago

Read 2 more answers

Select three ratios that are equivalent to 8:58:58, colon, 5. Choose 3 answers: Choose 3 answers: (Choice A, Checked) A 16:1016:

Snezhnost [94]

Answer:

I think the reference ratio given is wrong so the right one is

8:508:508:5

Step-by-step explanation:

Given that,

8:58:58:5

We want to find which of the option is equivalent to the given ration

Option A.

16:1016:1016:10

Divide each of the ration by

Then,

16÷2:1016÷2:1016÷2:10÷2

8:508:508:5

Option B

50:8050:8050:80

Divide through by 10

50÷10:8050÷10:8050÷10:80÷10

5:805:805:8

Option C

48:3048:3048:30

Divide through by 6

48÷6:3048÷6:3048÷6:30÷6

8:508:508:5

Option D

32:2032:2032:20

Divide through by 4

32÷4:2032÷4:2032÷4:20÷4

8:508:508:5

Option E

64:3564:3564:35

Divide through by 8

64÷8:3564÷8:3564÷8:35÷8

This doesn't have a factor

So the ratio still retain

64:3564:3564:35

So to analyse the solution,

I believe the reference ratio given is wrong, so I think the reference ratio about be 8:508:508:5

So, from the option, the equivalent to the given ratio are options A, C, and D

6 0

4 years ago

Sergey is solving 5x2 + 20x – 7 = 0. Which steps could he use to solve the quadratic equation by completing the square? Select t

olya-2409 [2.1K]

Answer:

Step-by-step explanation:

$\mathrm{For\:a\:quadratic\:equation\:of\:the\:form\:}ax^2+bx+c=0\mathrm{\:the\:solutions\:are\:}\\x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}\\\mathrm{For\:}\quad a=5,\:b=20,\:c=-7:\quad x_{1,\:2}=\frac{-20\pm \sqrt{20^2-4\cdot \:5\left(-7\right)}}{2\cdot \:5}\\x=\frac{-20+\sqrt{20^2-4\cdot \:5\left(-7\right)}}{2\cdot \:5}:\quad \frac{-10+3\sqrt{15}}{5}\\x=\frac{-20-\sqrt{20^2-4\cdot \:5\left(-7\right)}}{2\cdot \:5}:\quad -\frac{10+3\sqrt{15}}{5}\\$

$\mathrm{The\:solutions\:to\:the\:quadratic\:equation\:are:}\\x=\frac{-10+3\sqrt{15}}{5},\:x=-\frac{10+3\sqrt{15}}{5}$

7 0

3 years ago

Read 2 more answers

PLEASE, I NEED HELP!!!!!!

Rasek [7]

Okay so you're correct answer in this situation would be A but it could alsobe C

3 0

4 years ago

mr. dean has an even number of cats and an odd number of dogs. which of these choices could tell about his pets ? 6 cats and 3 d

valina [46]

Even numbers can be divided evenly into groups of two. The number four can be divided into two groups of two.

Odd numbers can NOT be divided evenly into groups of two. The number five can be divided into two groups of two and one group of one.

Even numbers always end with a digit of 0, 2, 4, 6 or 8.
2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 are even numbers.

Odd numbers always end with a digit of 1, 3, 5, 7, or 9.
1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31 are odd numbers.

The correct answer is 6 cats and 3 dogs.

4 0

3 years ago