Mathematics High School

3. Jill sold a third of her comic books and then bought 24 more.
She now has 30. With how many did she begin?

Help me out

Answers

Answer 1

Answer:

18

Step-by-step explanation:

30-24= 6

so when she sold them she had 6 left over

it says she sold one third so we need to find out that 6 is a third of what

to find that out now we multiply 6x3=18

jill had 18 books to start out with

Related Questions

A class has 30 boys and 20 girls. The average age of
boys is 12 yrs and girls 12 yrs. What is the
average age of the whole class."​

Answers

Answer:

class has 30 boys and 20 girls the average age of boys is 12yr and girls 12yr

whole age of class is 12 + 12 ÷2

= 24÷2

= 12

Step-by-step explanation:

so the average of whole class is 12

How to find if it is a function or not:
The set of ordered pairs (Z,A) where z is the zip code, and A is the street address.​

Answers

Answer: It is not a function.

Step-by-step explanation:

A function is something that "eats" an input and transforms it into an output.

We write them as y = f(x)

Where x is the input, and y is the output.

Now, a function has an important rule, for each input x, the function can only "transform it" (or map it) into only one possible output.

This means that, for example, if we have, for x = x1.

And a single

f(x1) = y1

f(x1) = y2

where y1 and y2 are different values.

Then this is not a function, because it is mapping the value x1 into two different outputs.

In this case, we would have:

f(Z) = A.

So Z is the input, but we know that a ZIP code works for an entire city, and in a given city we have lots of different street addresses, then for a single value of the input, Z, we have a lot of possible values of the output.

This means taht the set (Z, A) can not represent a function.

Please help will mark brainliest 15 points answer ASAP.

Use the graph below to fill in the blank with the correct number: (1 point)
f(1) =

Answers

Answer:

f(1) = -2

Step-by-step explanation:

Remember that when dealing with functions, it is written in the form of f(x)

We know that f(1) is the value of the function when the value of x is equal to 1

In this problem,  look on the graph to see

for x = 1

the value of the function is  f(1) = -2

Answer:

-2

Step-by-step explanation:

What is 15 to the 7 power divided by 15 to the 4 power equal to?

Answers

Answer:

3375

Step-by-step explanation:

Is 29.9 a rational, integer, whole number or all of the above?

Answers

Answer:

It is in integer

Step-by-step explanation:

An integer is any number positive or negative. A whole number would not have a decimal and if it were a rational number it could be written as a ratio.

The density of a substance can be found by dividing the mass of the substance by the volume of the substance. A sheet of pure iron has a mass of 500 grams and a volume of 4 in3. Write an equation of the form m=dv, where m represents the mass of a sheet of iron in grams, v represents the volume of a sheet of iron in cubic inches, and d is a constant, the density of iron in grams per cubic inch

Answers

Answer:

D=375g/cubic inch

Step-by-step explanation:

D=500 divided by 4/3

Solve the compound inequality 2.1 – 3 < 7 and 5 - 3 < 8

Answers

Step-by-step explanation:

2.1--3<7.

--0,9<7

true

5--3< 8

2<8

true

Write 9.1 as a mixed number and as an improper fraction.
Do not try to simplify your answers.

Answers

Answer:  9 1/10      91/10

Step-by-step explanation:

Answer:

9 1/10 and 91/10

Step-by-step explanation:

hope it helps :)

brainliest pls? have a good day/night

14x – 34 = 11x + 29
x=

Answers

Answer:

-1.31

Step-by-step explanation:

14x - 11x - 29x = 34

-26x = 34

x = 34/ -26

x= -1.31

Second attempt at getting this answered Please check the attachment

Answers

Answer:

Step-by-step explanation:

-18x+240 , the length of PA is 9x + 120 the length of AQ is 9x +120

The length of PQ is -18x+240

here are the first four terms in a sequence: 6, 10, 14, 18

the number 102 is NOT a term in this sequence. explain why.


thanks :)

Answers

Answer:

common difference = 4

if 102 is a term in sequence n should have non decimal value

a +(n-1)d = 102

0r 6 + (n-1)4= 102

0r, 4(n-1) = 96

or n-1 =24

n =25

102 is in a sequence

Step-by-step explanation:

A globe has a diameter of 14 inches. Find the volume of the globe. Round your answer to the nearest tenth.

Answers

Answer:

1436.8 in³ (nearest tenth)

Step-by-step explanation:

A globe is in the shape of a sphere.

[tex]volume \: of \: sphere = \frac{4}{3} π {r}^{3} [/tex]

Diameter= 2 ×radius

radius of globe

= 14 ÷2

= 7 inches

Volume of globe

[tex] = \frac{4}{3} π {(7}^{3} ) \\ = 1436.8 \: in^{3} \\ (nearest \: tenth)[/tex]

Step-by-step explanation:

We have given that diameter of globe (sphere) is 14 inches,Then it's radius is 14/2 = 7 inches :]

To find the volume of sphere we have to use the given below formula :]

[tex] \boxed {\underline{ \underline{\bigstar\:\: \sf Volume \: of \: sphere = \dfrac{4}{3} \pi r^3 \: \: \bigstar}}} \\ \\ [/tex]

☯ [tex]\underline{\boldsymbol{According\: to \:the\: Question\:now :}} [/tex]

[tex]:\implies \sf Volume \: of \: sphere = \dfrac{4}{3} \times 3.14 \times 7 \times 7 \times 7 \: \: \bigg \lgroup \bf{putting \: \pi = 3.14} \bigg \rgroup \\ \\ [/tex]

[tex]:\implies \sf Volume \: of \: sphere = \dfrac{4}{3} \times 3.14 \times 343 \\ \\ [/tex]

[tex]: \implies \underline{ \boxed{ \sf Volume \: of \: sphere = 1436.0267 \: cubic \: inches}} \\ [/tex]

Need help asap please! Thanks!

Answers

The diagram tells us 3 things: the right angle and the two corresponding side measurements. Because the side measurements are corresponding, we can set a proportion:

6/9=9/15

If this proportion is true, it means the triangles are similar. If this proportion is impossible, it means the triangles are no similar.

To calculate this, we use cross multiplication.

6/9=9/15

6*15=9*9
90=81

90 does not equal 81 making this proportion impossible, which concludes that these two triangles are not similar.

I hope this helps! Please comment if you have any questions.

1. Estimate
Square root 5

Answers

Answer: 25

Step-by-step explanation: 5^2 = 25, 5x5 = 25

Hope this helps!

2.2

did that help at all

Write "twenty-four and seventy thousandths" using base-ten numerals.

Answers

Answer:

24.070

Step-by-step explanation:

twenty-four and seventy thousandths

24

and means change from integers to fractions

24 70/1000

or as a decimal

24.070

what is 50 divided by 1

Answers

50 divided by 1 would be 50.

Read the word problem below.

Answers

The answer is: if x represents the number of pencils per box, solve the equation 8x+4=196

Answer:

Step-by-step explanation:

Number 4

if x represent the numbers of pencils per box solve the equation 8x4=196

so,she put 4 in each box

12 people can comfortably fit in a 4x4 foot square. Use this value to estimate the size of a crowd that is 10 feet deep on both sides of street along a 2 mile section of a parade route

Answers

hope this helps you out if i doesnt just comment and ill see what i can do

Solve for f.
Round your answer to 2 decimals.
9f = {(12f – 2)

Answers

Answer:

f=0.67

Step-by-step explanation:

Let's solve your equation step-by-step by isolating f.

9f=12f−2

Step 1: Subtract 12f from both sides.

9f−12f=12f−2−12f

You get:

−3f=−2

Step 2: Divide both sides by -3.

−3f/−3 = −2/−3

You get:

f= 2/3, or f= 0.67

Hope this helps! :)

4 b + 19 can be translated as "nineteen more than the product of 4 and a number." TrueFalse

Answers

Answer:

True

Step-by-step explanation:

Step-by-step explanation:

4b+19

If 19 is added to 4b, then yes, it is 'nineteen more than...'

4b is a multiplication expression in itself and the term 'product' means the answer to a multiplication problem.

So the answer is true.

hope it helps!

Javier used the expression below to represent his score in a game of mini-golf.

3x + x + 5 – 2x

If he simplifies the expression, which statements are true about the parts of the simplified expression? Select three options.

Answers

Answer:

I don't get it

Step-by-step explanation:

what is the smallest two digit positive integer such that the product of its two digits is one-half the integer

Answers

Let x be the tens and y be the ones digits.

The product of the number is then: 10x + y

The product is 1/2, so you need to multiply the product by 2 and the number:

10x + y = 2(x+y)

10x + y = 2x + 2y

Subtract 1 y from both sides

10x = 2x + y

Subtract 2x from

Both sides

8x = y

X has to be 1 , which would make y 8

The product number becomes 18

Since the product is 1/2, multiply by 2:

18 x 2 = 36

3 x 6 = 18

The answer is 36

Simplify: 6-8+7-2-8+13

Answers

Answer:

The answer is 8.

Step-by-step explanation:

6-8+7-2-8+13

= (6 +7 + 13) - (8+2+8)

= 26 - 18

= 8

A rectangle has an area of 102cm2. The length of the rectangle is 17 cm. What is the perimeter of the rectangle

Answers

Answer:

36

Step-by-step explanation:

To find the with divide 102 by 17, we get 6. Then add 6+6+17+17 because we know this is a rectangle and it has 2 with sides and 2 length sides. We get the answer of 36.

if it is 2:30 what time would it be 1 hour and 30 minutes

Answers

Answer:

4:00

Step-by-step explanation:

If it’s 2:30 it would be 4:00 in an hour and a thirty minutes ahead

Need Help!! because im confused

Answers

Answer:

3g+20

Step-by-step explanation:

Because Milena wants to have 3 cups per each guest and then she wants an additional 20 more.

Answer:

C. 3g+20

Step-by-step explanation:

The answer here is 3g+20.

Their will be an additional 20 cups of punch, which is addition.

5. Danny is selling cornhole boards to raise money for a local charity. He rents a booth at the state fair for $250. He sells the boards for $45. It costs him $20 to make each board. How many boards must Danny sell to break even for the cost of renting a booth? *​

Answers

Answer:

10 boards

Step-by-step explanation:

$450-$250=$200. $20 * 10 boards = $200. $200-$200=0.

Therefore the answer is 10 boards

Answer:10

Step-by-step explanation:

Find the distance between the points (-4, 6) and (3, -7)

Answers

Answer:

the distance between (-6,4) and (3,-8) is 15 units

Help on these questions?

Answers

The diamond ones you multiply the two sides to get the top number and add the two sides to get the bottom. If the number are in other stops besides the two sides you must find a solution that works with the corresponding numbers. I’m not really sure about the rest. Good luck with that!

2xy-xz=4 solve for x


Pls help due today

Answers

Hey there!

[tex]Answer:\boxed{x=\frac{4}{2y-z}}[/tex]

[tex]Explanation:[/tex]

[tex]2xy-xz=4[/tex] Solve for X

x(2y - z) Factor out the variable x

x(2y - z)/2y - z = 4/2y - z Divide both sides by 2y - z

x = 4\2y - z

Hope this helps!

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