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Rufina [12.5K]
3 years ago
12

Given f(x)=-2/3x+3 and g(x)=-2x^2-5

Mathematics
1 answer:
timama [110]3 years ago
3 0

Answer:

2/3 give 3 with a g(8) 25 real

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There are 420 students in a school.if 40% of them are girls.find the number of girls and boys
HACTEHA [7]

Answer:

There would be 168 girls and 252 boys

Step-by-step explanation:

40% or 0.40 x 420 = 168

420 - 168 = 252

6 0
2 years ago
Read 2 more answers
Pls solve I need this today
frez [133]

Answer:

25

Step-by-step explanation:

8 0
2 years ago
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deff fn [24]
No. 1.5 is a whole number while 1.5% is a percent
3 0
2 years ago
The LB Company has long manufactured a light bulb with an average life of 5400 hours. Company researchers have recently develope
elena55 [62]
<h2><u>Answer with explanation</u>:</h2>

Let \mu be the average life of light bulbs.

As per given , we have

Null hypothesis : H_0 : \mu =5400

Alternative hypothesis : H_a : \mu >5400

Since H_a is right-tailed and population standard deviation is also known, so we perform right-tailed z-test.

Formula for Test statistic : z=\dfrac{\overlien{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

where, n= sample size

\overline{x}= sample mean

\mu= Population mean

\sigma=population standard deviation

For n=95,\ \overline{x}=5483\ \&\ \sigma=500, we have

z=\dfrac{5483-5400}{\dfrac{500}{\sqrt{95}}}=1.61796786124\approx1.6180

Using z-value table , Critical one-tailed test value for 0.06 significance level :

z_{0.06}=1.5548

 Decision : Since critical z value (1.5548) < test statistic (1.6180), so we reject the null hypothesis .

[We reject the null hypothesis when critical value is less than the test statistic value .]

Conclusion : We have enough evidence at 0.06 significance level to support the claim that the new filament yields a longer bulb life

8 0
3 years ago
When 64 is added to the number that is produced by doubling the number x, the result is equal to 35 times the number that 1 less
photoshop1234 [79]
64+(2x)=35(x-1)
expand
64+2x=35x-35
minus 2x from both sides
64=33x-35
add 35 to both sides
99=33x
divide both sides by 33
3=x
the number is 3
6 0
3 years ago
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