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3 years ago

Evaluate √x^2 − y^2 when x^2 =33 and y^2 =15

Mathematics

1 answer:

Andre45 [30]3 years ago

3 0

Answer:

3√2

Step-by-step explanation:

In this question, we are asked to get the value of √ ( x²-y² ), while the value of x² and y² are given to be 33 and 15 respectively.

Hence, x² =33 and y² = 15.

Putting the values of x² and y² in the above expression we get,

√ ( x²-y² ) = √ ( 33-15) = √18 =3√2. (Answer)

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The graph shows the cost C in dollars of W pounds of blueberries a proportional relationship. select all the true statements

labwork [276]

Answer:

A, D

Step-by-step explanation:

Cost ($) = C

lbs (Blueberries) = W

One pound of blueberries costs $2.75 because to find how much 1 lb is you need to divide by 6.

6 is the number of pounds at that point in the graph, so you divide both the pounds and cost by 6 to find how much 1 lb is.

To find how much 5 lbs costs, multiply both the cost and number of pounds ($2.75 to 1 lb) by 5.

2.75 * 5 is 13.75 (This means C is wrong)

Do the same but with 12 for D

2.75 * 12 is 33, so D is correct

You could do the same method as above for E, but the easier way to do this is to see that the relationship of 3:9 is equal to a 1:3 ratio, which is the same as what the pounds to cost ratio is (which is 1:2.75)

Hope this helps! ^_^

4 0

3 years ago

Work out

trasher [3.6K]

Answer:

The correct answer is 1.

Step-by-step explanation:

In order to solve the problem $\frac{3}{9}$ + $\frac{2}{3}$ , we need can use two methods.

Method 1: Make the denominators the same.

3/9 + 2/3 =

3/9 + 6/9 =

9/9 =

Method 2: Turn both fraction into decimals (<em>by dividing the numerator by the denominator</em>.)

3/9 or 3 ÷ 9 = 0.3 (when rounded to the nearest tenth)

2/3 or 2 ÷ 3 = 0.7 (when rounded to the nearest tenth)

0.3 + 0.7 = 1

Therefore, the answer to this question is 1.

5 0

3 years ago

Read 2 more answers

You mix 1 3/4 gallons of blue paint with 1 1/2 gallons of yellow paint to make green paint. How much green paint do you have?

irakobra [83]

IS this blaise weiss and yeuh I think its about 30 feet

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4 years ago

FIRST CORRECT ANSWER GETS BRAINLIEST, 43 ISNT THE ANSWER THANKS

tatuchka [14]

Step-by-step explanation:

10+2+2+7+5+3+8+8= 21+24= 45units

5 0

3 years ago

Read 2 more answers

Eleanor scores 680 on the mathematics part of the SAT. The distribution of SAT math scores in recent years has been Normal with

Katen [24]

Answer:

Elanor's standardized score is 1.19
Gerald's standardized score is 0.72
Elanor has higher score

Step-by-step explanation:

To compare Elanor's and Gerald's math scores, we need to standardize them and calculate their z-scores.

z score can be calculated using the formula

z= $\frac{X-M}{s}$ where

X is the student's score

M is the mean score of the exam

s is the standard deviation of the exam

Elanor's standardized score is:

z(e) = $\frac{680-554}{106}$ ≈ 1.19

Gerald's standardized score is:

z(g)= $\frac{27-24.7}{3.2}$ ≈ 0.72

Since z(e) > z(g), Elanor has higher score

6 0

3 years ago