The cost of 4th book is $22.
What is the average?In maths, the average value in a set of numbers is the middle value, calculated by dividing the total of all the values by the number of values. When we need to find the average of a set of data, we add up all the values and then divide this total by the number of values.
Given that, Jenny bought 4 books in a bookstore. The prices of the first 3 books were $10, $15 and $25.
Let the cost of 4th book be $x.
Now, average = (10+15+25+x)/4
(50+x)/4 =18
50+x =72
x=$22
Therefore, the cost of 4th book is $22.
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use suitable Identities and find
●( X - 5 ) ( x-5 )
●( 3x +2 ) (3x -2 )
●( 1+x )(1+x)
Answer:
[tex].[/tex]
Step-by-step explanation:
IdEnTiTy UsED[tex] {x}^{2} - {y}^{2} = (x + y)(x - y)[/tex]
1)
[tex](x - 5)(x - 5)[/tex]
=(x-5)²
2)
[tex](3x - 2)(3x + 2)[/tex]
[tex] {(3 x)}^{2} - {(2)}^{2} [/tex]
[tex] = 9 {x}^{2} - 4[/tex]
3)
[tex](1+x)(1+x)[/tex]
= (1+x)²
When you add a positive and negative number, how can you tell whether the sum will be positive or Negative?
Answer:
just remember this:
negative x negative = positive
positive x positive = positive
postive x negative = negative
negative x postive= negative
lookon bbcbitesize for adding negatives and positive rule
It costs $10 to get into a carnival. It costs an
additional $2 for each ride you go on. If you paid
a total of $36 at the carnival, how many rides did
you go on?
Answer:
13
Step-by-step explanation:
36-10=$26 spent on rides
26/2=13
A teacher wrote the number 24 on the board, then the answer choices below. Which of the answer choices does not contain the number 2?
a. irrational numbers
b. integers
c. Natural Numbers
d. Whole Numbers
Answer:
a. irrational numbers
Step-by-step explanation:
Answer:
Irrational numbers does not contain the number 2(or 24, depending on if that last bit was a typo or not).
7. Evaluate this expression if x=-2*
3x2 - 4x
Need help ASAP Please
Answer:
20
Step-by-step explanation:
Evaluate 3 x^2 - 4 x where x = -2:
3 x^2 - 4 x = 3×(-2)^2 - -2×4
Hint: | Evaluate (-2)^2.
(-2)^2 = 4:
3×4 - 4 (-2)
Hint: | Multiply 3 and 4 together.
3×4 = 12:
12 - 4 (-2)
Hint: | Multiply -4 and -2 together.
-4 (-2) = 8:
8 + 12
Hint: | Evaluate 12 + 8 using long addition.
| 1 |
| 1 | 2
+ | | 8
| 2 | 0:
Answer: 20
What is the value of 32 x 107 in scientific notation?
1.6x 1014
?
0.5x 102
05.0x10
5.0 x 10
%
0.5x 107
Answer:
32x107=3424=3,424*[tex]10^{3}[/tex]
Step-by-step explanation:
Watermelon is on sale for $4 per pound. How much would 12.8 pounds cost?
Answer:
$51.2
Step-by-step explanation:
4 x 12.8 = 51.2
Write the sentence as an inequality. Three times a number r plus 8 is fewer than −12
Answer: [tex]3r+8<-12[/tex].
Step-by-step explanation:
It is given that three times a number r plus 8 is fewer than −12.
We need to write the sentence as an inequality.
Three times a number r = 3r
Times a number r plus 8 = 3r+8
Fewer than = less than = <
So, the inequality for the sentence "three times a number r plus 8 is fewer than −12" is
[tex]3r+8<-12[/tex]
Therefore, the required inequality is [tex]3r+8<-12[/tex].
The inequality that describes the sentence is:
[tex]3r + 8 < -12[/tex]
--------------------------------
3 times 1 is [tex]3 \times 1 = 3[/tex], 3 times 2 is [tex]3 \times 2 = 6[/tex], and so on, thus 3 times a number r is [tex]3 \times r = 3r[/tex].The plus word means that we have an addition operation, plus 8, thus [tex]3r + 8[/tex]Fewer than -12 means that the less than -12 completes the inequality, thus:[tex]3r + 8 < -12[/tex]
Which is the inequality that describes this situation.
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emily created the net worth statement shown. Based on the Information in the table, what is emilys net worth ?
Answer:
the answer is B
Step-by-step explanation:
net worth is liabilities minus assets
Seven more than twice a number is 17
Answer:
2x + 7 = 17 using algebra equation you can resolve ir
Convert 5 and 2/7 into a improper fraction.
Answer:
14 divide 5 =3.1 is your answer if I'm not wrong
Answer:
37/7
Step-by-step explanation:
First you multiply 5 by the denominator which is 7 which will equal to 35 and then you add the numerator which is 2 to that and you get 37/7
Plss help will give brainliest
The PTA has 25 members. Each member must pay $5.50 in membership dues. In the first week of school, 11 members paid their dues. The remaining members paid during the second week. How much money was collected in dues during the second week of school?
Answer:
$77.00
Step-by-step explanation:
25-11= 14
14 x 5.50= 77
point e is the midpoint of segment DF.if de is 8 what is the length of df
What is the median of the following numbers: 100, 99, 81, 99, 86.
Need help? Click here.
93
99
0465
None of the other answers are correct
Answer:
its 99
Step-by-step explanation:
because it is the middle of your set after you arrange them in order from least to greatest
In each sack, there are 10 bags. In each bag, there are 5 pouches. Which number completes the equation that relates p, the number of pouches, and s, the number of sacks?
Answer: p = 50 s
Step-by-step explanation:
Given: In each sack, there are 10 bags. In each bag, there are 5 pouches.
i.e. Total pouches in each sack = (Number of bags in each sack) x (Number of pouches in each each bag)
= 10 x 10 =50
Let p = number of pouches, and s= the number of sacks
Then, Number of p pouches in s sacks will be given by-
p = 50 s , which is the required equation.
14x-10=3 (4+x); solve for x
Answer:
x = 2
Step-by-step explanation:
So we are given the equation 14x - 10 = 3(4 + x) and we are asked to solve for x. To this, we will have to get x by itself on one side and a value on the other side.
14x - 10 = 3(4 + x)
Distribute the 3 on the right side.
14x - 10 = 12 + 3x
Add 10 to both sides.
14x = 22 + 3x
Subtract 3x from both sides.
11x = 22
Divide both sides by 11.
x = 2
So now we got the answer of x = 2.
I hope you find my answer helpful.
Answer:
x = 2
Step-by-step explanation:
14x - 10 = 3(4+x)
=> 14x -10 = 12 + 3x
=> 14x - 3x = 12 + 10
=> 11x = 22
=> x = 22/11
=> x = 2
hi can someone help please
Answer:
put ur protactor from the middle to where its up to then look at where the line is and you will get your answer
Answer:
Step-by-step explanation:
1. PQR is an equilateral triangle formed by 3 diagonals of the cube. Therefore, it would be 60 degrees. 2. An angle which measures less than 90° is called an acute angle. The measure between 0° to 90°. In the picture below, the angle formed by the intersection of PQ and QR at Q forms an angle PQR which measures 45°. Thus, PQR is called an acute angle.
Show all work to multiply quantity 3 plus the square root of negative 16 end quantity times quantity 6 minus the square root of negative 64 end quantity
Plus means addition and square root means √
3 plus the square root of negative 16: 3 + √-16
Minus means subtraction and square root means √
6 minus the square root of negative 64: 6 - √-64
Its asking you to multiply both quantities.
(3 + √-16) * (6 - √-64)
Best of Luck!
Answer:
18-32i^2
Step-by-step explanation:
3 + the negative square root of 16 would simplify to 4i
so it will be (3+4i)
6 - the negative square root of 64 would simplify into 8i
so it will be (6-8i)
To solve (3+4i)(6-8i) use FOIL and add like terms
Which list shows these numbers in order from least to greatest?
Answer:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
Answer:
Put the negatives 1st the then positives... assuming thats what it is
Step-by-step explanation:
Mrs. Bell has an interest rate of 4.175% on her house. Mr. Bentley has an interest rate of 4.25% on his house. Which explains who has the lower interest rate?
A.
Mr. Bentley has the lower interest rate, because both decimals have a 4 in the ones place, and 0 thousandths is less than 5 thousandths.
B.
Mr. Bentley has the lower interest rate, because both decimals have a 4 in the ones place, and 5 hundredths is less than 7 hundredths.
C.
Mrs. Bell has the lower interest rate, because both decimals have a 4 in the ones place, and 7 hundredths is less than 5 hundredths.
D.
Mrs. Bell has the lower interest rate, because both decimals have a 4 in the ones place, and 1 tenth is less than 2 tenths.
Answer: D. Mrs. Bell has the lower interest rate, because both decimals have a 4 in the ones place, and 1 the third is less than 2 tenths.
Answer:
D
Step-by-step explanation:
If (8^9)p=8^18,what is the value of p? 20 points
[tex]:\implies\sf\:(8^9)^p=8^{18}[/tex]
[tex]\dag\bf\:(a^m)^n=a^{mn}[/tex]
[tex]:\implies\sf8^{9p}=8^{18}[/tex]
[tex]\dag\bf\:18=9\times 2[/tex]
[tex]:\implies\sf\:8^{9p}=8^{9\times 2}[/tex]
[tex]\dag\bf\:a^x=a^y\:\longrightarrow\:x=y[/tex]
[tex]:\implies\sf\:9p=9\times 2[/tex]
[tex]:\implies\boxed{\bf{\red{p=2}}}[/tex]
I give you brainiest!
Answer:its 42
Step-by-step explanation:
Y=42
Answer:
Step-by-step explanation:
Y = - x + 7
Y = - (-1) + 7
Y = 8
Himari is solving the equation 4( x - 3 ) =16. Her first step is 4x - 12 = 16 math nation
Steps to solve:
4(x - 3) = 16
~Distribute left side
4x - 12 = 16
~Add 12 to both sides
4x = 28
~Divide 4 to both sides
x = 7
Best of Luck!
Solve the equation for X
4=6/ax+5
Answer:
x - 4 = 10 Solution.
2x - 4 = 10 Solution.
5x - 6 = 3x - 8 Solution
2(3x - 7) + 4 (3 x + 2) = 6 (5 x + 9 ) + 3 Solution.
Solution.
Step-by-step explanation:
The value of x in the given expression is -a/6
What is expression?Expressions in math are mathematical statements that have a minimum of two terms containing numbers or variables, or both, connected by an operator in between.
Given is an expression, 4 = 6x / a + 5
Solving for x, we get,
4 = 6x / a + 5
Subtracting 5 both the side,
6x / a = -1
Multiplying by a both the sides,
6x = -a
Dividing by 6 both sides,
x = -a/6
Hence, the value of x is -a/6
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6 less than a number t?
Answer:
t-6
Step-by-step explanation:
listen to how the statement is worded, it will help with other problems like this.
Alice’s school has purchased a new $10,000 copier. The copier depreciates in value by 15% every year. The principal will replace the copier when it drops below 10% of its original value.
The inequality 10,000()t < can be used to represent the situation.
The solution set for the inequality is (, ∞).
Answer:
The inequality 10,000 (0.85)^t < (1,000) can be used to represent the situation.
The solution set for the inequality is (14.168)
Answers: 0.85, 1,000, 14.168
The solution set for the inequality is (15, ∞).
What is depreciation?The monetary value of an asset decreases over time due to use, wear and tear or obsolescence. This decrease is measured as depreciation.
What is compound interest for depreciation?If the reduced value of the goods is compounded for fixed time then it is called compound depreciation.
Formula of compound interest for depreciation:
[tex]A = P(1-\frac{r}{100} )^{n}[/tex]
Where,
A= Final Amount
P = initial Principal
n = time in years
r = rate per annum
According to the question
New copier costs (p) = $10,000
depreciates in value every year (r) = 15%
The principal will replace the copier when it drops below 10% of its original value.
i.e Final amount should be less than [tex]$10,000 * \frac{10}{100}[/tex]
A is < $ 1000
Using compound interest formula :
[tex]A = P(1-\frac{r}{100} )^{n}[/tex]
[tex]1000 > 10000(1-\frac{15}{100} )^{n}[/tex]
[tex]0.1 > (0.85 )^{n}[/tex]
n ≈ 14.168
n = after 15years (next whole no)
Hence , The solution set for the inequality is (15, ∞).
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2) 23 and 24 are complementary angles. If m 23 = (x + 24)º and m 24 = (x )º, then
find the measures of these angles,
Answer:
m<23 = 57° & m<24= 33°
Step-by-step explanation:
You have to create an equation that equals 90°.
(x+24)+x=90
2x+24=90
2x=66
x=33
m<23 = 33+24= 57° so m<23= 57°
m<24= 33°
What conclusion can be drawn by observing that 20 is to the right of 10 on a number line?
3) There are 35 people living in poverty and 42 people not living in poverty
1) John says that the ratio of people living in poverty to the people not living in poverty is 5:7. Explain why John is or is not correct. Use a diagram to support your answer.
Answer:
John is not correct
Step-by-step explanation:
(Unless you meant 5:6)
Make the base question into [tex]\frac{35}{42}[/tex]
simplify as much as possible. I found the Greatest Common Denominator (GCF) of 35 and 42, which was 7
divide 35 and 42 by the GCF (7), and you should get 5:6 as your answer.
