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3 years ago

Please please help need this ASAP!!! a will mark brainliest to whoever can answer quickly please!

Mathematics

1 answer:

vampirchik [111]3 years ago

4 0

Answer:

the first one i think is a reflection over the x-axis

for the last on question 9 A, I think it's a 90-degree rotation counterclockwise

your coordinates for part B on would be -4,7 and -6,13

and then for part B on the last question, i think your coordinates would be -5,4

Step-by-step explanation:

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78=6 f please help solve ion have much time

svet-max [94.6K]

Answer:

hii

Step-by-step explanation:

4 0

3 years ago

Can someone help me?!?! Thanks :))

dusya [7]

Surface area = 2(lw) + 2(wh) + 2(lh)

2(4 * 5) + 2(5 * 15) + 2(4 * 15)
2(20) + 2(75) + 2(60)
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310 square inches

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3 years ago

Read 2 more answers

Scooter rental company A charges an initial fee of $3 plus $1.15 for every hour. Scooter rental company B charges $1.75 for ever

Allisa [31]

Step-by-step explanation:

6 0

3 years ago

Fluoxetine, a generic anti-depressant, claims to have, on average, at least 20 milligrams of active ingredient. An independent l

san4es73 [151]

Answer:

$t=\frac{18.7-20}{\frac{5}{\sqrt{80}}}=-2.326$

$df=n-1=80-1=79$

$p_v =P(t_{(79)}$

Step-by-step explanation:

Information given

$\bar X=18.7$ represent the sample mean for the content of active ingredient

$s=5$ represent the sample standard deviation for the sample

$n=80$ sample size

$\mu_o =20$ represent the value that we want to test

t would represent the statistic

$p_v$ represent the p value for the test

System of hypothesis

We need to conduct a hypothesis in order to check if the true mean for the active agent is at least 20 mg, the system of hypothesis would be:

Null hypothesis: $\mu \geq 20$

Alternative hypothesis: $\mu < 20$

The statistic would be:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

Now we can calculate the statistic:

$t=\frac{18.7-20}{\frac{5}{\sqrt{80}}}=-2.326$

P value

The degrees of freedom are calculated like this:

$df=n-1=80-1=79$

Since is a one left tailed test the p value would be:

$p_v =P(t_{(79)}$

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4 years ago

Which products are negative?

Mila [183]

<span>So we want to know which of theese products are negative. We have three rules: -1*(+1)=-1 and -1*(-1)=+1 and +1*(+1)=+1 Lets calculate and check: A. is negative, B. is negative, C. is positive and D.positive. So Aand B are negative and that is the correct answer.</span>

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3 years ago