Mathematics High School

someone help me please!!
If x=2 and y=-3, what is the value of 2x(to the second power) - 3xy-2y(to the second power)

when i say to the second power i mean exponent 2! THANK YOU

Answers

Answer 1

Answer:

8

Step-by-step explanation:

2(2)^2-3(2)(-3)-2(-3)^2

2*4+18-18

8+18-18

8+0

8

Related Questions

2(c+1)=10 HELP PLSSSSSSSS

Answers

Answer:

c=4  

Will venus1234 delete the c4?

Step-by-step explanation:

You simplify by distributive property

2c+2=10

Then you can use subtraction property of equality to subtract 2 from both sides to get  

2c=8

Then do division property of equality to get the unit rate of c.

You end up with

c=4

4

4

4

4

4

4

4

Hope this helps!

Answer: c=4

Step-by-step explanation:

2÷2=c+1

10÷2=5

5-1

c=4

A 3 ft tree casts a 10 ft. shadow. How many feet long is the shadow of a 26 ft tall tree at the same time? If necessary, round to the nearest tenth.​

Answers

Answer:

8 feet

Step-by-step explanation:

It is given that, a 3 ft tree casts a 10 ft. shadow.  It means that 1 ft long shadow will cast by [tex]\dfrac{3}{10}[/tex] feet long tree.

Let 26 ft tall tree will cast x feet long shadow. To find it using unitary method we get :

[tex]x=\dfrac{3}{10}\times 26\\\\x=7.8\ \text{feet}[/tex]

or

x = 8 feet

So, 8 feet long is the shadow of a 26 feet tall tree.

2. Compute where able, estimate otherwise

A 5/8-11/16

Answers

Answer:

I solved it and my answer is - 1.208

Answer:

0.063

Step-by-step explanation:

what is 5 divided by 5 5/6?

Answers

Answer:

6/7.   or 0.857142 repeating

Step-by-step explanation:

Answer:

[tex] \dfrac{6}{7} [/tex]

Step-by-step explanation:

Step 1: Change the mixed numeral to a fraction.

Step 2: To divide by a fraction, multiply by the reciprocal.

[tex] 5 \div 5 \frac{5}{6} = [/tex]

[tex] = 5 \div \dfrac{5 \times 6 + 5}{6} [/tex]

[tex] = 5 \div \dfrac{35}{6} [/tex]

[tex] = \dfrac{5}{1} \times \dfrac{6}{35} [/tex]

[tex] = \dfrac{5 \times 6}{1 \times 35} [/tex]

[tex] = \dfrac{30}{35} [/tex]

[tex] = \dfrac{6}{7} [/tex]

When Stacey’s son,Kevin, solves the problem,he changed the equation from part C to one that didn’t have any fractions. In other words, he eliminated the denominator on both sides of the equation.Explain how to get rid of both denominators in the equation 9/2=x/24

Answers

Answer:

To get rid of the 2 in the denominator of 9/2 multiply both sides of the equation by 2 or 2/1. to get rid of the 24 in the denominator of x/24, multiply both sides the equation by 24 or 24/1

Step-by-step explanation:

Hope this helps :)

What is the slope of the line that passes through the points (-11, 5) and (17,-9)? *
A. -2
B. -1/2
C. 7
D. 2.

Answers

Answer:

-1/2

Step-by-step explanation:

y2-y1/ x2-x1

-9-5/ 17-(-11)

-14/ 28

-1/2

find the slope of the line through each pair of points (-6,9) and (7,-9)

Answers

Answer:

-18/13

Step-by-step explanation:

(x1,y1) = (-6,9)

(x2,y2) = (7,-9)

m= y2-y1 / x2-x1 =  -9-9 / 7-(-6)

-18/13

PLEASE ANSWER THIS ASAP !!!!!!!!

Answers

Answer:43

Step-by-step explanation:

YOUR WECOME!!!!!

If that isnt the answer because i evaluated, try t=43/h :)

I suck at math..
Katoni bought 2 1/2 dozen pencils. There are 12 pencilsin a dozen. How many pencils did Katoni buy?

Answers

Answer:

30 pencils.

Step-by-step explanation:

Okay, So The answer is 30 pencils. First we must know that 2 dozen is equivalent to 24. Our fraction part is 1/2, what is 1/2 of a dozen? 6, so we must add 6 to 24 to get our answer of 30! Hope that helped : D

He bought 30 pencils

Nicole is making smoothies. She uses 1.2 kilograms of apples and 600 grams of strawberries. How many kilograms of fruit does Ann use in all?

Answers

Answer:

wait Ann? wasn't the question stating that Nicole was making smoothies? kinda threw me off

either way: 1.8 kilograms of fruit

Step-by-step explanation:

first you need to convert all of your measurements into a same unit, so 600 grams into kilograms, remember that 1 gram = 0.001 kilograms, so all you need to do is multiply 600 by 0.001

you'll get 0.6 and then you add that to 1.2 kilograms which is 1.8 in total. hope it helped

NO GOOGLE IS ALLOWED CAUCLATORS ARE ALLOWED

Answers

Answer:

ok whats the question

Step-by-step explanation:

What is the x intercept of the line 6x - 5y = 12?​

Answers

Answer:

2,0

Step-by-step explanation:

6x-5y=12

subtract 6x from both sides.

-5y=-6x+12

divide -5 on both sides.

y=6/5x-12/5

Answer:

x = 2  ⇒  point (2, 0)

Step-by-step explanation:

The x-intercept is the place where the line crosses the x-axis. This is also when y = 0.

So, set y equal to 0 and solve for x:

6x - 5y = 12

6x - 5 * 0 = 12

6x = 12

x = 12/6 = 2

The x-intercept, thus, is at x = 2.

~ an aesthetics lover

I need help can anyone help me???

Answers

Answer:

0

Step-by-step explanation

Answer:

W (1/3)=0

Step-by-step explanation:

w 1/30=3x1/3-1=

now elimante the opposites

w(1/3)=1-1

which equals 0

help me simplify and explain please

Answers

Answer:

X=-34

Step-by-step explanation:

#1. multiply 3 to (x-2) and -4 to (x+7) you should get this: 3x-6-4x-28

#2. Then move the -4x and switch it with -6 so it should look like this: 3x-4x-6-28

#3. Do the calculation: -x-34

#4. move -34 to the answer side of your equation, should look like: -x=34

#5. move the negative from x to 34 your answer should look like: x=-34

#6. Celebrate! WooHoo! you just finished!!!

(please help me)The center of a circle is at (8, —8). One point on the circle is at (8, —3). What is the area of the circle? (Use 3.14 for pi.)

A 15.7 units^2

B 64 units^2

C 78.5 units^2

D 200.96 units^2

Answers

Answer:

it A or C depending on the site you use

Step-by-step explanation:

good luck

Maria solved the equation.

4 (3 x minus 8) minus 4 = 24. 12 x minus 32 minus 4 = 24. 12 x minus 36 = 24. 12 x = 60. x = 5.

What methods did she use and in what order did she use them?

Answers

Answer:

distributive property

combining like terms

addition property of equality

division property of equality

Step-by-step explanation:

I took the quiz

Answer:

C.) Distributive property.

Combining like terms.

Addition property of equality.

Division property of equality.

Step-by-step explanation:

I just finished doing the test on edge 2020  and got it right.

Madison made 1 & 1/2 gallons of punch she used 2 pints of punch 3 quarts of ginger ale the rest was orange juice how many quarts of orange juice did she use ?

Answers

Answer:

2 quarts of orange juice

Step-by-step explanation:

If she made 1&1/2 gallons and, excluding orange juice, she used 2 pints (1quart) and 3 quarts that is 1 gallon (without orange juice) if we then subtract what we have from our total we are left with 1/2 gallon (aka: 2quarts) meaning we have a remaining 2 quarts of orange juice

Which of the following is true about the functions below

Answers

Any pictures of the functions?

Answer: There is no function below

Step-by-step explanation:

Step 1 upload picture below question

The Senior class is reserving a banquet hall for their prom. They are required to pay a
$500 reservation fee in addition to $30 for each person who attends the prom. They
have estimated that the prom will cost a total of $4100. How many people do they
expect to attend?

Answers

Answer: 120 people

Step-by-step explanation:

First take $4100 - $500 = $3600

then you divide

3600/30 = 120

which equals

120 People are estimated to attend

In a recent poll, the Gallup organization found that 45% of adult Americans believe that the overall state of moral values in the United States is poor. Suppose a survey of a random sample of 25 adult Americans is conducted in which they are asked to disclose their feelings on the overall state of moral values in the United States. Explain why this is a binomial experiment.

Answers

Answer:

This is a binomial experiment because

The number of trials is fixed The trial are independent of each other The there is only two outcome (i.e the outcome that the moral value is  poor or the outcome that the moral value is good )This outcome is consistent throughout  the trial

Step-by-step explanation:

Where would I draw the yellow dot please help?

Answers

Answer: An angle bisector cuts and angle into equal halves so draw it in the center so that it splits the angle into two angles that equal 45 degrees

Step-by-step explanation:

Pls I need help I know I’m dumb :;)

Answers

Answer:

D

Step-by-step explanation:

11 x 5 = 55

Multiple has multiply in it so you multiply.

Hope this helps!!

Answer: the answer is D hope this helped

Step-by-step explanation:

Find the value of 16^3/4​

Answers

Answer:

8

Step-by-step explanation:

PLEASE HELP WILL MARK BRAINLIEST!! DUE SOON

Answers

Answer:

i cant reall read the screen sorry

Step-by-step explanation:

You are creating identical candy bags using 18 chocolate bars and 30 peanut butter cups. What is the greatest number of bags you can fill using all the candy? How many of each will be in each bag?
What is the greatest number of bags you can fill using all the candy?
How many chocolate bars will be in each bag?
How many peanut butter cups will be in each bag?

Answers

Answer:

If you can't split up the peanut butter cups, the identical bags would each have 1 chocolate bar and 1 peanut butter cup because 30 cannot be divided between 18 bags as whole numbers more than once.6Is you're looking for the answer all you have to do is find the gcf (greatest common factor) of 18 and 30 and you would get 6I hope this helps

Answer:

The Greatest number of candy bags I can make is 3. There would be 6 chocolate bars and 10 Peanut Butter Cups.

My Work (copy if you would like, but do not paste this same exact image to a document.):

Define the word expression to me. Use proper English and complete sentences.

Answers

Answer:

The process of making known one's thoughts or feelings.

Step-by-step explanation:

Hope it helps :D

Answer:

a finite combination of symbols that is well-formed according to rules that depend on the context.

If d(x) = -2x + 3; find d(36).

Answers

Answer:

-69

Step-by-step explanation:

You have to plug in 36 into x.

It would then be -2(36) + 3.

First do -2(36) which would equal -72.

You then have to do -72 + 3,

That would equal -69

Which fraction is equivalent to StartFraction 5 Over 20 EndFraction? StartFraction 4 Over 16 EndFraction, because StartFraction 5 Over 20 EndFraction = one-fourth and One-fourth = StartFraction 4 Over 16 EndFraction StartFraction 4 Over 12 EndFraction, because StartFraction 5 Over 20 EndFraction = one-fourth and One-fourth = StartFraction 4 Over 12 EndFraction StartFraction 4 Over 19 EndFraction, because StartFraction 5 Over 20 EndFraction = StartFraction 5 minus 1 Over 20 minus 1 EndFraction = StartFraction 4 Over 19 EndFraction StartFraction 4 Over 15 EndFraction, because StartFraction 5 Over 20 EndFraction = one-fifth = StartFraction 5 minus 1 Over 20 minus 5 EndFraction = StartFraction 4 Over 15 EndFraction

Answers

Answer:

[tex]\frac{5}{20} = \frac{1}{4} = \frac{4}{16}[/tex]

Step-by-step explanation:

Given

[tex]Fraction = \frac{5}{20}[/tex]

Required

Get equivalent fractions

[tex]Fraction = \frac{5}{20}[/tex]

Divide numerator and denominator by 5

[tex]Fraction = \frac{5/5}{20/5}[/tex]

[tex]Fraction = \frac{1}{4}[/tex]

Multiply the numerator ad denominator by 4

[tex]Fraction = \frac{1 * 4}{4 * 4}[/tex]

[tex]Fraction = \frac{4}{16}[/tex]

Hence:

[tex]\frac{5}{20} = \frac{1}{4} = \frac{4}{16}[/tex]

Option A answers the question

Answer:loser

Step-by-step explanation:

I need to know the equation

Answers

Answer:

I think it is 7x+y=

Step-by-step explanation:

Please forgive me if I am wrong :)

A number changes from 50 to 76. What type of percent change is this? Calculate the percent change.

Answers

Answer:

there was a 56% decrease change

There is a [tex]\boldsymbol{52\%}[/tex] percentage change as a number changes from [tex]50[/tex] to [tex]76[/tex].

Type is increase in percentage.

Define percentage.

A percentage is a figure or ratio that is stated as a percentage of one hundred. The percent sign, " [tex]\%[/tex] ", is frequently used to represent it.

Difference between new and old number [tex]=76-50[/tex]

                                                                      [tex]=\boldsymbol{26}[/tex]

Percentage change [tex]=\frac{76-50}{50}\times 100[/tex]

                                  [tex]=\boldsymbol{52\%}[/tex]

So, there is a [tex]\boldsymbol{52\%}[/tex] increase.

Find out more information about percentage here:

https://brainly.com/question/13450942?referrer=searchResults

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