3 years ago

Please help me???? I need ASAP

Mathematics

1 answer:

Assoli18 [71]3 years ago

4 0

Answer:

Step-by-step explanation:

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A math test is worth 100 points and has 30 problems.

mr_godi [17]

Answer:

I think 15

Step-by-step explanation:

15+15=30, so both 3 or 4 point questions have 15 problems each, hope this helped

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2 years ago

F(X)=2x^2 +1 find and simplify:: if f(a) =19 find a.<br> Isn't a just 19??

liberstina [14]

$2a^2+1=19\\
2a^2=18\\
a^2=9\\
a=-3 \vee a=3$

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3 years ago

PLS ANSWER AND LOOK UNDER THE QUESTION TOO :)))

Sunny_sXe [5.5K]

D. (-2,-1)

Hope it helps you.

7 0

2 years ago

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A professor at a university wants to estimate the average number of hours of sleep the students get during exam week. The profes

balandron [24]

Answer:

The sample size is $n = 2$

Step-by-step explanation:

From the question we are told that

The margin of error is E =4.266

The standard deviation is $\sigma = 2.539$

From the question we are told the confidence level is 99% , hence the level of significance is

$\alpha = (100 - 99 ) \%$

=> $\alpha = 0.01$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 2.58$

Generally the sample size is mathematically represented as

$n = [\frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ] ^2$

=> $n = [\frac{2.58 * 2.539 }{4.266} ] ^2$

=> $n = 2$

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2 years ago

The price of a shirt is 18.50, but you have a coupon that lowers the price by 20%. What is the price of the shirt after using th

AURORKA [14]

The new price of the shirt is $14.8

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2 years ago

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