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2 years ago

Hi help me with this pls

Mathematics

1 answer:

Rudiy272 years ago

3 0

$\huge \underline{ \pink{Answer}}$

Refer to the attachments

Attachment (1)

B (1)

Attachment 2

B(2)

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While going on a field trip, a busload od 54 students will have to be split up into three groups. Two thirds will go into lunch

Helen [10]

Number of students on the bus = 54

Students who will go to lunch first are = $\frac{2}{3}$ of 54

= $\frac{2}{3}\times54=36$

Hence, 36 students will go first for lunch.

7 0

3 years ago

How many terms are in 2 + 4x + 7y

TEA [102]

Three terms are there

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3 years ago

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Two college roommates have each committed to donating to charity each week for the next year. The roommates’ weekly incomes are

schepotkina [342]

Answer:

C. 5 weeks.

Step-by-step explanation:

In this question we have a random variable that is equal to the sum of two normal-distributed random variables.

If we have two random variables X and Y, both normally distributed, the sum will have this properties:

$S=X+Y\\\\\ \mu_S=\mu_X+\mu_Y=30+60=90\\\\\sigma_S=\sqrt{\sigma_X^2+\sigma_Y^2}=\sqrt{10^2+20^2}=\sqrt{100+400}=\sqrt{500}=22.36$

To calculate the expected weeks that the donation exceeds $120, first we can calculate the probability of S>120:

$z=\frac{S-\mu_S}{\sigma_S} =\frac{120-90}{22.36}=\frac{30}{22.36}=1.34\\\\P(S>120)=P(z>1.34)=0.09012$

The expected weeks can be calculated as the product of the number of weeks in the year (52) and this probability:

$E=\#weeks*P(S>120)=52*0.09012=4.68$

The nearest answer is C. 5 weeks.

6 0

2 years ago

The mass of a bar of chocolate is 1800g.

Umnica [9.8K]

Hello,

<span>Density = Mass/Volume

9 = 1800/volume
9volume = 1800
volume = 200 cm^3</span><span>
</span>
The answers is 200 cm^3

Hope that helped :)

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3 years ago

Read 2 more answers

In a basketball game Elena scored twice as many points as Tyler Tyler scores four points fewer than Noah and Noah scores three p

saveliy_v [14]

Full question:

In a basketball game, Elena scores twice as many points as Tyler. Tyler scores four points fewer than Noah, and Noah scores three times as many points as Mai. If Mai scores 5 points, how many points did Elena score? Explain your reasoning

Answer and explanation:

We start from known to unknown. We know that Mai scored 5 points and so we work from here.

Since Mai scored 5 points and Noah scored three times as many points then Noah's score = 3×5= 15 points

Since Tyler scored four points less than Noah, Noah's score= 15-4= 11 points

Finally Elena's score is twice that of Tyler hence Elena's score =2×11= 22 points

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3 years ago

Hi help me with this pls ​

Hi help me with this pls