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3 years ago

I do not understand this question, what do i do??

Mathematics

2 answers:

DiKsa [7]3 years ago

8 0

Answer:

90 shoppers have cookies or fruits as their favorite snack.

Step-by-step explanation:

First add 15% and 15% to get a total of 30% then multiply 300 by 30 to get 9000 and divide that by 100 to get your answer of 90.

Margarita [4]3 years ago

5 0

Answer:

Step-by-step explanation:

so if there are 300 shoppers and 10% of 300=30

we also know that if you add the % from people who got cookies to the % of people who got fruits you would get 15+15=30

30% of 300 is the same as 10% times 3 so if 10%=30 then that times 3 =90

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Miss Hoffman gave 90-cent tip to a waitress for serving a meal costing $6.00 what percent of the bill is her tip?

seraphim [82]

So,

Miss Hoffman gave 90 cents to the waitress.

Her meal, including the tip, cost $6, or 600 cents.

Her subtotal was represented by the quantity (600 - 90) cents.
600 - 90 = 510

Dividing 90 by 510 yields the percent tip that Miss Hoffman gave the waitress.
$\frac{90}{510}$
$\frac{9}{51}$
0.176 or 17.6% ≈ 18%

Miss Hoffman gave the waitress approximately 18% tip.

3 0

3 years ago

In which of your school subjects do you use manipulation of numbers?

Leona [35]

Answer:

You use the manipulation of numbers in algebra/mathematics.

6 0

3 years ago

A study by a federal agency concludes that polygraph tests given to truthful persons have probability 0.2 of suggesting that the

Yuliya22 [10]

Answer:

b) 0.9313

c) mean = 2.4

standard deviation= 1.3856

d) 0.5583

Step-by-step explanation:

Given:

p = 0.2

n = 12

a) X= number of applicants classified as deceptive.

Probability mass function of X will be:

$P(X=x) = \left(\begin{array}{c}12\\x\end{array}\left) (0.2)^x(1-0.2)^1^2^-^x,x=0, 1, 2, .....,12$

b) Probability that the polygraph says at least 1 is deceptive:

$P(X≥1) = 1 -P(X=0) = 1 -\left(\begin{array}{c}12\\0\end{array}\left) (0.2)^0(1-0.2)^1^2^-^0$

= 1 - 0.0687

= 0.9313

c) The mean number among 12 truthful persons who will be classified as deceptive:

E(X) = n•p

= 12 * 0.2

= 24

Standard deviation:

$s.d = \sqrt{12*0.2*(1-0.2)}$

= 1.3856

d) Probability that the number classified deceptive is less than the mean:

$P(X$

= 0.5583

7 0

3 years ago

Use absolute value to describe the relationship between a negative credit card balance and the amount owed.

bearhunter [10]

-$25 balance does not mean you have $25 credit but that you owe $25, the absolute value of -$25. Just like the absolute value of 5 would be -5. its just the opposite.

8 0

3 years ago

Read 2 more answers

Find the point at which the line intersects the given plane. x = 1 − t, y = 5 + t, z = 2t; x − y + 3z = 0

Mars2501 [29]

I think is t=2/3 hope you get it right and use photo math it help

4 0

3 years ago