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Artyom0805 [142]
3 years ago
15

2x - 1 = 0 is a quadratic equation. True False

Mathematics
2 answers:
harina [27]3 years ago
6 0
I believe the answer is false

Hope this helps
alukav5142 [94]3 years ago
5 0
The answer is false.  Hope this helps.
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If f(x) = –3x – 2, what is f(–5)?
Step2247 [10]
F(x) = -3x - 2
f(-5) = -3(-5) -2 = 15 - 2 = 13
3 0
2 years ago
How do solve it and answer it​
ozzi

Answer:

you just post the question and people answer

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Pschological tests are often used to determine the hostility levels in people. High scores on the HLT pschological test correspo
algol13

Answer:  the correct answer is we are 95% confident that there is no statistically significant difference in the mean treatment  methods for hostility.  

Step-by-step explanation:

1)  Test for the equality of variances in the two groups to choose the appropriate t-test.  

H0: σ (1)^2 = σ (2)^2  

Ha: σ (1)^2 ≠ σ (2)^2  

Larger variance = 64  

Smaller variance = 49  

F = 1.30612  

Degrees of freedom 15 and 9  

Critical F from the table (with alpha=0.05) = 2.58  

Calculated F is smaller than critical F, so we use the pooled variance t-test.  

Sample 1 size 7  

Sample 2 size 8  

Sample 1 mean 79  

Sample 2 mean 84  

Sample 1 S.D. 7  

Sample 2 S.D. 8  

Pooled S.D = [(n1-1)s1^2+(n2-1)s2^2]/(n1+n2-2)

Pooled variance s = [(6)(49)+(7)(64))] / (13) =  (294+448)/13=742/13=57.076923

Pooled variance s^2 = 57.076923  

Standard error of difference in means = sqrt(1/n1+1/n2) times sqrt(s^2)  

Standard error of difference in means = (0.517549)(7.554927) = 3.910046 (denominator of t)  

Confidence interval = (mean1-mean2) +/- t SE  

t is the critical t with 24 degrees of freedom = 2.056  

(79 - 84) +/- (2.056) (3.910046)  

= (-13.04, 3.04)  

Interval encloses 0  

We are 95% confident that there is no statistically significant difference in the mean treatment  methods for hostility.  

4 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20-%2011%20%3D%207%20-%20x" id="TexFormula1" title=" - 11 = 7 - x" alt=" - 11 = 7 - x" align=
Oksana_A [137]
X = 18 
if you need the steps i could give them to you just ask! 
Hope that helped!
:)
5 0
3 years ago
Hey guys please help!!
Advocard [28]

Answer:

<em>Yes</em>

Step-by-step explanation:

g(x) = - \frac{1}{4} x + \frac{1}{4}

y = - \frac{1}{4} x + \frac{1}{4} ....... <em>(1)</em>

<em>(1)</em> × 4

4y = - x + 1

x = - 4y + 1

y = - 4x + 1

f(x) = - 4x + 1

∴ f(x) and g(x) <em>are inverses</em>

8 0
2 years ago
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