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HACTEHA [7]
3 years ago
15

Use the discriminant to describe the roots of each equation. Then select the best description,

Mathematics
1 answer:
mr Goodwill [35]3 years ago
6 0

\bf \qquad \qquad \qquad \textit{discriminant of a quadratic} \\\\\\ \stackrel{\stackrel{a}{\downarrow }}{6}x^2\stackrel{\stackrel{b}{\downarrow }}{+13}x\stackrel{\stackrel{c}{\downarrow }}{+6}=0 ~~~~~~~~ \stackrel{discriminant}{b^2-4ac}= \begin{cases} 0&\textit{one solution}\\ \underline{positive}&\textit{two solutions}\qquad \textit{\Large \checkmark}\\ negative&\textit{no solution} \end{cases} \\\\\\ 13^2-4(6)(6)\implies 169-144\implies 25

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For the real-valued functions f(x)=2x+3 and g(x)=√x-5, find the composition fog and specify its domain using interval notation.
Burka [1]

Find fog

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  • f(g(x))
  • f(√x-5)
  • 2√(x-5)+3

For real range the domain

  • x-5≥0
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Domain is [5,oo)

7 0
2 years ago
I NEED HELP!! ASAP!! 3x + -7 = 42
Dmitrij [34]

Answer:

16 1/3

Step-by-step explanation:

add 7 to 42 to get 49, then divide by 3 to get 16 1/3. :)

7 0
3 years ago
Collette wanted to know if there was a difference in favorite food types among students at her large high school. She took a ran
AleksandrR [38]

Answer:

(29-23)²/23 + (16-23)²/23 + (19-23)²/23 + (28-23)²/23

Step-by-step explanation:

Given :

n(American) = 29

n(Chinese) = 16

n(Mexican) = 19

n(Italian) = 28

Expected value = (29 + 16 + 19 + 28) / 4

Where, 4 = sample size

Expected value, E = 23

χ² = (Observed value - Expected value)² / expected value

χ² = (29-23)²/23 + (16-23)²/23 + (19-23)²/23 + (28-23)²/23

3 0
3 years ago
A pipe is leaking and 1.5 cups per day about how many gallons per week is the pipe leaking
MatroZZZ [7]
The question asks per week. So 1.5 cups times 7 days is 10.5 cups. 

<span>The pipe leaks </span>10.5 cups<span> every week.</span>
7 0
3 years ago
Read 2 more answers
Please help. thank you.
liq [111]
<span>Reason:
<u>The angle between tangents and angle subtended by radii are supplementary</u></span><u>∠BAP = 90° </u>

x = 180 - 73 = 107°

Answer: x = 107°





5 0
3 years ago
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