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3 years ago

Brainliest for correct answer

Mathematics

2 answers:

klasskru [66]3 years ago

7 0

Answer:

the blank is -1/5

brainliest please?

ludmilkaskok [199]3 years ago

4 0

The answer is “-1/5”

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in order to receive a B grade in a college course, it is necessary to have an overall average of 80% correct on two 1-hour exams

Dvinal [7]

Since 80% of the 300 total points is 240, and we have 127 so far, 240-127=113 as a minimum

8 0

4 years ago

b) If a shopkeeper allows 20% discount and sells an article for Rs 200, find the marked price of the article.

zzz [600]

Answer:

250

Step-by-step explanation:

mp=sp+d%of mp

x = 200+20÷100×x

100x-20x = 20000

x= 250

3 0

2 years ago

Keith is working two jobs this summer as a lifeguard and a tutor. he earns $16 an hour as a lifeguard and $18 an hour as a tutor

Oxana [17]

Answer:

He could work 10 hours as a lifeguard, and 5 hours as a tutor

Step-by-step explanation:

If he makes $16 an hour as a lifeguard

and $18 an hour as a tutor,

He could work 10 times $16, to make $160 for 10 hours.

Now we subtract this from $250, this makes $90.

We know need to find out how many times 18 goes into 90, 5 times.

So we know that he could work 10 hours as a lifeguard and 5 hours as a tutor.

I hope this is right.

I hope this helps too, have a nice day!

7 0

2 years ago

Each year the US Environmental Protection Agency (EPA) releases fuel economy data on cars manufactured in that year. Below arc s

fomenos

Answer:

Follows are the solution to this question:

Step-by-step explanation:

Please find the complete question in the attachment file.

$n_1 = 26 \\\\ x_1 = 16.12 \\\\s_1 = 3.58\\\\n_2 = 26\\\\ x_2 = 19.85 \\\\ s_2 = 4.51$

$H_0: u_1 = u_2\\\\H_1: u_1 \neq u_2$

Using formula:

$\to S^{2}_{p}=\frac{S^{2}_{1}(n_1 -1)+ S^{2}_{2}(n_2-1)}{n_1+n_2-2}$

$\to Sp^2 = \frac{((26-1) \times (3.58^2) + (26-1) \times (4.51^2))}{(26+26-2)}$

$= \frac{((25) \times 12.8164 + (25) \times 20.3401 )}{(26+24)}\\\\ = \frac{(320.41 + 508.5025)}{(50)}\\\\ = \frac{(828.9125)}{(50)}\\\\=16.57825$

$\to Sp = 4.0716$

Calculating the value of standard error:

$\to SE = Sp \times \sqrt{\frac{1}{n_1}+\frac{1}{n_2}}$

$=4.0716 \times \sqrt{\frac{1}{26}+\frac{1}{26}}\\\\=4.0716 \times \sqrt{\frac{1+1}{26}}\\\\=4.0716 \times \sqrt{\frac{2}{26}}\\\\=4.0716 \times \sqrt{\frac{1}{13}}\\\\=4.0716 \times 0.277 \\\\=1.1278332\\\\= 1.1293$

Calculating the value of test statistic:

Formula:

$\to t = \frac{(x_1-x_2)}{SE}$

$= \frac{(16.12 -19.85)}{1.1293}\\\\= \frac{(-3.73)}{1.1293}\\\\=-3.303$

Calculating the value of Degree of freedom:

$= n_1+n_2 -2 \\\\= 26+26 -2 \\\\= 52 -2 \\\\= 50$

Because the P-value is a 2-tailed test = 0.0018

Thus they reject H0, because of P-value < 0.05,

Yeah, certain data show clearly that the means are different.

7 0

3 years ago

At a malt shop 8/10 of the malts sold were chocolate. What percent of malts sold were chocolate?

Savatey [412]

Answer: 80 %

Step-by-step explanation: take it and multiply by ten to get 80/100 then turn to percent to get 80%

hope this helps mark me brainliest if it did

6 0

4 years ago

Read 2 more answers

Brainliest for correct answer​

Brainliest for correct answer