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3 years ago

I’m in a test so I’ll be posting all of these if someone could help I would appreciate it very much

Mathematics

1 answer:

aliina [53]3 years ago

7 0

I’m pretty sure it’s the yellow one

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Write the linear inequality in standard form for this situation: In order to raise money to attend upcoming competitions, the Ma

yawa3891 [41]

Answer:

x+ 2y ≥ 240 is the linear inequality in standard form for this situation.

Step-by-step explanation:

Let the number of hot chocolates sold = x

Cost of each hot chocolate = $1

Let the number of apple ciders sold = y

Cost of each hot chocolate = $2

So, the total amount earned = x ( $1) + y ($2)

Also, the total amount earned should at least be $240

Hence, according to the question

x+ 2y ≥ 240 is the linear inequality in standard form for this situation.

6 0

3 years ago

Find the perminter of 9.58m 11m 15m and 9m

alukav5142 [94]

Answer:

44.58m

Step-by-step explanation:

9.58+11+15+9 (Perimeter is adding all the sides around)

8 0

3 years ago

Among a sample of 55 male soldiers the average shower time was found to be 2.95 minutes and the population standard deviation is

Oksanka [162]

Answer: -3.0593

Step-by-step explanation:

The test statistic for the difference between two population mean (when population standard deviations $\sigma_1\ \&\ \sigma_2$ are known ) is given by :-

$z=\dfrac{\overline{x}_1-\overline{x}_2}{\sqrt{\dfrac{\sigma_1^2}{n_1}+\dfrac{\sigma_2^2}{n_2}}}$

where ,

$n_1\ \&\ n_2$ = Sample sizes taken from two populations 1 and 2.

$\overline{x}_1-\overline{x}_2$ = Difference between two Sample mean.

$\sigma_1\ \&\ \sigma_2$ = Standard deviations of populations 1 and 2.

As per given , we have

$n_1=55\ \&\ n_2=58$

$\overline{x}_1=2.95\ \&\ \overline{x}_2=3.3$

$\sigma_1=0.65\ \&\ \sigma_2=0.56$

We assume that the data follows a normal distribution.

Then, the test statistic will be :-

$z=\dfrac{2.95-3.3}{\sqrt{\dfrac{(0.65)^2}{55}+\dfrac{(0.56)^2}{58}}}\\\\=\dfrac{-0.35}{\sqrt{0.0130887}}\\\\=\dfrac{-0.35}{0.1144059}=3.05928278174\approx-3.0593$

Hence, the test statistic= -3.0593

5 0

3 years ago

Juan’s father is paying for a $45 meal. He has a 10%-off coupon for the meal. After the discount, an 8% sales tax is applied. Wh

leva [86]

Answer:

$43.74

Step-by-step explanation:

will pay= $45

10% of =$45×10/100=$4.5

so, $45-$4.5= $40.5

8% tax= $40.5×8/100 =$3.24

total= $43.74

7 0

3 years ago

I think of a number, multiply it by three, and add four. I get twenty two.

melomori [17]

Step-by-step explanation:

3x+4=22

3x=22-4

3x=18

x=18/3

x=6

3 0

3 years ago

Read 2 more answers