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VLD [36.1K]
2 years ago
10

Help me please with the steps on how you can find the number of solutions or zeros with these questions!

Mathematics
1 answer:
arsen [322]2 years ago
6 0

Answer:

2x²+5x-9=0

using quadratic formula

a=2 b=5 c=-9

x=[-5±√5²-4(2)(-9)]/2(2)

x=[-5±√97]/4

the zeros are( -5±√97)/4

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Glenn and helen are playing ping pong. For every 3 points that glenn scores, helen scores 4 points. If Glenn scores 6 points, ho
forsale [732]

Answer:

8

Step-by-step explanation:

If Helen scores 4 for each time Glenn scores 3

4 x 2=8

4 0
2 years ago
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A city council is deciding whether or not to spend additional money to reduce the amount of traffic. The council decides that it
garri49 [273]

Answer:

t = 2.9272 > 1.708 at 25 degrees of freedom

null hypothesis is rejected

The council decides that it will increase the transportation budget if the amount of waiting time for drivers is not exceeds 18 minutes

Step-by-step explanation:

<u>Step (i):</u>-

A sample of 26 main roads results in a mean waiting time of 21.1 minutes with a sample standard deviation of 5.4 minutes.

Given sample size 'n' = 26

The mean of the sample 'x⁻ = 21.1 min

Standard deviation of the sample 'S' = 5.4 min

The Population mean 'μ' = 18min

<u>Step(ii)</u>:-

<u>Null hypothesis: H₀</u> :  The council decides that it will increase the transportation budget if the amount of waiting time for drivers exceeds 18 minutes.

'μ' > 18min

<u>Alternative hypothesis</u> :H₁:  

'μ' <18min

<u>Level of significance :</u> ∝=0.05

Degrees of freedom γ = n-1 = 26-1 =25

The test statistic

 t  = \frac{x^{-}-mean }{\frac{S}{\sqrt{n} } }

t  = \frac{21.1-18}{\frac{5.4}{\sqrt{26} } }

t = 2.9272

<u>Step(iii)</u>:-

The tabulated value t = 1.708 at 25 degrees of freedom

t = 2.9272 > 1.708 at 25 degrees of freedom

Null hypothesis is rejected at  5% significance level of significance

<u>Conclusion</u>:-  

The council decides that it will increase the transportation budget if the amount of waiting time for drivers is not exceeds 18 minutes

8 0
2 years ago
Kyle drew three line segments with lengths: 2/4 inch 2/3inch, and 2/6 inch list the fractions in order from least to greatest
Sati [7]
----------------------------------------------------------------
Method 1
 ----------------------------------------------------------------
Since the numerators are the same, the smaller the denominators, the greater the fraction is.

Arranging from the least to the greatest
\dfrac{2}{6} \ , \ \dfrac{2}{4} \ , \ \dfrac{2}{3}


----------------------------------------------------------------
Method 2
----------------------------------------------------------------
Lets change all to the same denominators 

\dfrac{2}{4}  =  \dfrac{2 \times 3}{4 \times 3}  =  \dfrac{6}{12}

\dfrac{2}{3}  =  \dfrac{2 \times 4}{3 \times 4}  =  \dfrac{8}{12}

\dfrac{2}{6}  =  \dfrac{2 \times 2}{6 \times 2}  =  \dfrac{4}{12}

Now that all the denominators are the same, we can arrange the fractions by comparing the numerators. The bigger the numerators, the greater the fraction.

Arranging from the least to the greatest
\dfrac{2}{6} \  , \   \dfrac{2}{4}  \ , \   \dfrac{2}{3}
3 0
3 years ago
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Can u help me answer that question ​
leva [86]

Answer:

I dunno

Step-by-step explanation:

You cant see the words lol

3 0
2 years ago
If cosec θ - sec θ = 0, then the value of tan³ θ + 2 is:
krek1111 [17]

The value of tan³ θ + 2 = 3

Solution is in attachment !

7 0
3 years ago
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