All categories

3 years ago

Help! I give brainlest. Problem is in Image

Mathematics

2 answers:

yawa3891 [41]3 years ago

5 0

Answer:

Step-by-step explanation:

let's place 9 in place of p and 4 in place of q. I will use a star in place of that symbol for the sake of my convenience having to look for it, apologies.

$9 \star 4 = 9^2-4^2 = 81-16 = 65$

lora16 [44]3 years ago

4 0

Answer:

Step-by-step explanation:

9^2-4^2=65

You might be interested in

waheda purchased 8 textbooks each costing rupees 12 and 4 story books each question rupees 9 find the ratio of amounts she spent

lyudmila [28]

Answer:

8/3 or 2(2/3) Textbooks to storybooks

Step-by-step explanation:

Textbooks: (8 books)*(12 rupees/book) = 96 rupees

Storybooks: (4 books)*(9 rupees/book) = 36 rupees

Total is 132 rupees

Ratio: Textbook/Storybook = 96/36

96/36 = 8/3 or 2(2/3) Textbooks to storybooks

8 0

2 years ago

At a costumer service call center for a large company, the number of calls received per hour is normally distributed with a mean

Marysya12 [62]

We have been given that at a customer service call center for a large company, the number of calls received per hour is normally distributed with a mean of 150 calls and a standard deviation of 5 calls. We are asked to find the probability that during a given hour of the day there will be between 146 calls and 163 calls.

First of all, we will use z-score formula to find z-score corresponding to 146 and 163.

$z=\frac{x-\mu}{\sigma}$

$z=\frac{146-150}{5}$

$z=\frac{-4}{5}$

$z=-0.8$

$z=\frac{163-150}{5}$

$z=\frac{13}{5}$

$z=2.6$

Our next step is to find percentage of data scores falls between both z-scores.

$P(-0.8$

Using normal distribution table, we will get:

$P(-0.8$

Let us convert our answer into percentage.

$0.78348\times 100\%=78.348\%$

Upon rounding our answer to nearest thousandths, we will get:

$78.348\%\approx 78.35\%$

Therefore, the probability that during a given hour of the day there will be between 146 calls and 163 calls is approximately $78.35\%$ .

8 0

3 years ago

Calculate the volume of this cylinder, giving your answer to 1 decimal place

Aleksandr-060686 [28]

Answer:

2827.4

Step-by-step explanation:

V = πr2h this is the equation that can be used for these problems.

V= π(10)2(9)

the radius is 10 because the diameter is 20. Divide the given diameter by 2 to find the radius.

8 0

3 years ago

PLEASE HELP I WILL AWARD BRANLIEST - 4 kitchen assistants can prepare 10kg of vegetables in 45 minutes. How long would it take 1

Sunny_sXe [5.5K]

Answer:

hi your answer is in the image

3 0

3 years ago

Read 2 more answers

After school, Marcus can walk 1 mile to the library in about the same time he can bike 2.5 miles to the sporting goods store. Hi

DIA [1.3K]

$d-distance\\t-time\\v-speed$

$d_1=1mile\\d_2=2.5miles\\t_1=t_2\\v_1+6=v_2\\\\v=\frac{d}{t}\to vt=d\to t=\frac{d}{v}\\\\\frac{d_1}{v_1}=\frac{d_2}{v_2}\\\\\frac{1}{v_1}=\frac{2.5}{v_1+6}\\\\cross\ multiply:\\2.5v_1=v_1+6\\2.5v_1-v_1=6\\1.5v_1=6\ \ \ \ \ /:1.5\\v_1=4\\\\Answer:Marcus'\ walking\ speed\ is\ 4\ mph.$

5 0

3 years ago