Answer:
Psychology textbooks = 98 and physics textbooks = 294
Step-by-step explanation:
Let there are x psychology textbooks sold.
No of physics textbooks sold = 3x
ATQ,
A textbook store sold a combined total of 392 physics and psychology textbooks in a week.
x + 3x = 392
4x = 392
x = 98
It means there are 98 psychology textbooks sold and 3x = 3(98) = 294 physics textbooks sold.
Which of the following is equivalent to 2x(4x3)
Two similar cones have volume of 4 m and 108 m respectively. If the large one has surface area 54 m, find the surface area of the smaller one.
[tex]\displaystyle\bf\\Explanations:\\\\The~similarity~ratio~of~two~similar~cones=k\\\\k=is~the~ratio~between~2~corresponding~lengths\\\\k=\frac{R_1}{R_2}=\frac{h_1}{h_2}\\\\The~ratio~between~2~corresponding~areas~of~similar~cones=k^2\\\\\frac{Area~1}{Area~2}=k^2\\\\The~ratio~between~the~volumes~of~the~2~similar~cones=k^3\\\\\frac{Volume~1}{Volume~2}=k^3[/tex]
.
[tex]\displaystyle\bf\\Solving:\\\\Volume1=108~m^3\\\\Volume2=4m^3\\\\k^3=\frac{108}{4}\\\\k^3=27~~\Big|\sqrt{~}\\\\k=\sqrt[\b3]{27}\\\\k=3\\\\Area1=54~m^2\\\\\frac{Area~1}{Area~2}=k^2\\\\\frac{54}{Area~2}=3^2\\\\\frac{54}{Area~2}=9\\\\Area2=\frac{54}{9}\\\\\boxed{\bf Area2=6 m^2}[/tex]
Hallp!! will give brainliest.
2.) Use what you know about similarity in right triangles to solve this problem.
Given the area of a triangle is ½ bh, find the area of triangles ABC, BDC and DCA. The picture of the question is right below! thank you.
Answer:
ABC 2.44
BDC 1.22
DCA 1.22
Step-by-step explanation:
area of a triangle=bh1/2
to find height, use pythagorean theorem a^2 + b^2 =c^2
for ABC, height (1.95) times base(2.5) divided by 2
ABC is bisected so DCA and BDC are congruent, meaning once you've found the area of one of those triangles, you have found both areas.
Cut 2.5 in half to find the base of BDC/DCA.
base (1.25) times height (1.95) = 1.22
Answer:
ABC 2.44
BDC 1.22
DCA 1.22
Step-by-step explanation:
is 3π/9 irrational or rational
Answer:
irrational
Step-by-step explanation:
Since π is an irrational number, it would make 3π/9 an irrational number too since multiplying or dividing by pi makes the answer an irrational number.
how can i explain for the question???
The ratio of berries to oranges is 12:5. If there are 25 oranges, how many berries are there
Answer:
60
Step-by-step explanation:
5*5 is 25
then 12 * 5 is 60!
What is the measure of angle Y?
60 40
Answer:
if it is triangle it is 80
What is the center of the circle shown below?
А
ОА. В
ОВ. АВ
в
ос. А
OD. Y
Answer:
A
Step-by-step explanation:
the answer is A with the letter B next to it
The center of the circle is B.
What is Center of Circle?A circle's centre is the point from which all of the distances to the other points on the circle are equal. The radius of the circle is the measurement at issue.
The location of a moving point on a plane such that its separation from a stationary point on the plane remains constant or fixed is described as a circle.
A circle is a two-dimensional form characterised by its centre and radius. If we know the centre and radius of a circle, we can draw it. There are an endless number of radii for a circle. A circle's centre is the point at which all of its radii meet. It is also known as the middle of the circle's diameter.
When we are given a circle and must locate its centre.When a circle's equation is supplied and we need to get the coordinates of its centre.From the figure the equidistant point from the surface of the circle is B.
Learn more about Centre of Circle here:
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1 block: 19 houses = 20 blocks:???? Houses?
Answer:
380
Step-by-step explanation:
as 1 block =19 houses
so 20 blocks*19= 380 houses
Answer: 380
Step-by-step explanation: 19 x 20 = 380
PLSSSSSS I NEED HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
25 points!!!
Simplify the Expressions:
[tex]\sqrt{(3-\sqrt{19})^{2} }[/tex]
Answer:
3 - [tex]\sqrt{19}[/tex]
Step-by-step explanation:
[tex]\sqrt{(3 - \sqrt{19})^2}[/tex]
The ^2 in the square root cancels each other so
3 - [tex]\sqrt{19}[/tex]
Answer:
[tex] \sqrt{19} - 3[/tex]
Step-by-step explanation:
sqrt (3 - sqrt 19)²
|3 - sqrt 19|
= sqrt 19 - 3
in a journey of 450km a person complete its 150km in 3hours.Then he increases his speed by 20%.How long time does it take to complete all the journey
Answer:
450 km
150/3=50km/hr
50+20%
1/5*50=10
50+10=60
60km/hr
450-150=300
300/60=5
5 hours
A rectangular garden is fenced on all sides with 246 feet of fencing. The garden is 7 feet longer than it is
wide. Find the length and width of the garden.
(w + 7) feet=top w=side
The length of the garden is
feet.
The width of the garden is
feet.
Answer:
4
Step-by-step explanation:
PLZ ANSWER IF U KNOW THE ANSWER
WILL GIVE AS MUCH POINTS AS I CAN BC THIS IS A THROW AWAY ACCOUNT (Nvrm you guys just ganna cop the points and give me a swamp answer). WILL MARK BRAINLYEST.
1) write the equation
2) Generate at least two ordered pairs
1) Bob sold burgers for $6 and milkshakes for $4. At the end of the day, he made $422.
2) Bob paid a $25 sign-up fee for streaming content, plus $12 per month for his subscription
Answer:
1 is 6x+4y=422
2 is (12,25)
i dont think 2 is right im really sorry about that- but im like kinda confident for one. i would also check with someone else tho
Answer:
3fftedvvvte4ffff
Step-by-step explanation:
ggvggrrrvvg
The table shows the cookie sales for Tina's troop. If each box costs $3.50, show two ways that
HELP PLZ!!!
Tina could find the troop's total cookie sales.
Kind of Cookie
Mint
Vanilla sandwich
Peanut butter
Number of Boxes
60 boxes
42 boxes
56 boxes
Answer:
you can multiply the number of cookies with the cost of each box
Step-by-step explanation:
60 (number of boxes) x 3.50 (the cost for each box) = $210
42 (number of boxes) x 3.50 (the cost for each box) = $147
56 (number of boxes) x 3.50 (the cost for each box) = $196
I hope this helpsss :)
A family eats at a restaurant. The bill is $42. The family leaves a tip and spends $49.77.
How much was the tip in dollars?
Answer;
7.77
Step-by-step explanation:
factor completely, I NEED HELP
4x^3 + 7x^2 +4x + 7
The common factor is x ^ 3
So that gives you x ^ 3 = (4+ 7 / x + 4 / x ^ 2 + 7 / x ^ 3)
Because we therefore simplify x ^ 3 = (4 + (7x ^ 2 / x ^ 3) + (4x / x ^ 3) + 7 / x ^ 3)
Find the height of a right circular cone whose radius is 5 cm and volume is 100 pie cm cubed
Answer:
h = 3.82
I have attached picture
A solution has a pH of 10.3. When a solid is dissolved in the solution, the pH changes to 9.6. What can be inferred from this observation? (2 points)
Answer:
We see that the original material was a base, after adding the other material into the base it reduces its basicity.
So we can infer that the substance added was an acid as if we add bases it will increase the basicity.
PLZ MARK BRAINLIEST
JK has endpoints located at J(15,-13) and K(-9,27) what are the coordinates of the midpoint JK.
A.(3,7)
B.(12,20)
C.(1,9)
D.(14,18)
Answer:
(3, 7)
Step-by-step explanation:
The formula for calculating the midpoint of two coordinates is expressed as:
M(X, Y) = [x1+x2/2, y1+y2/2]
Given the coordinates J(15,-13) and K(-9,27), the coordinates of the midpoints is expressed as:
X = 15-9/2
X = 6/2
X = 3
Similarly,
Y = y1+y2/2
Y = -13 +27/2
Y = 14/2
Y = 7
Hence the coordinate of the midpoint is at (3, 7)
A 4 inch by 6 inch picture is placed in a gram that creates a uniform border of x inches around the picture
Answer:
1.5 inches.
Step-by-step explanation:
A picture measuring 4 inches by 6 inches is placed inside a frame which has equal width around the entire picture.
The area of the frame and the picture is 63 square inches.
Pls Help meh!! I have more Questions based on math coming up in a few seconds Juss pls give meh the best answer
Answer:
27!!! I did the test you just have to divide
Answer:
Step-by-step explanation:
35 + 25h=45 what does it equal
Please Help
Find the coordinates of the point P that divides the directed line segment from A to B in the given ratio.
A(-6, 9), B(2, 1); Ratio 5 to 3
Answer:
The coordinates of the point P = (x, y) = (-1, 4)
Step-by-step explanation:
Let the coordinates of P be (x, y)
(x₁, y₁) = (-6, 9)(x₂, y₂) = (2, 1)ratio = m:n = 5:3Using the section formula
x = [(mx₂ + nx₁)] / [(m+n)]
= [5(2)+3(-6)] / [5+3]
= [10-18] / [8]
= -8/8
= -1
y = [(my₂ + ny₁)] / [(m+n)]
= [5(1)+3(9)] / [5+3]
= [5+27] / [8]
= 32/8
= 4
Therefore, the coordinates of the point P = (x, y) = (-1, 4)
Find the output g when the input r is 4
g=25-3r
g=?
Answer:
G=13. On kahn
Step-by-step explanation:
Multiplication Property of One
1⋅w⋅16
Answer:
The correct answer is 16w.
Step-by-step explanation:
w = 1w
1⋅w⋅16 =
1⋅1w⋅16 =
16w
Therefore, the correct answer is 16w.
Hope this helps! :D
Bo big cookies for two hours and 30 minutes he finished baking at 8:30 PM when did bo start baking
Answer:
6:00 pm
Step-by-step explanation:
Please help me!!! I’ll mark Brainlyest!
Answer:
12/6 2 is the best answer
The scale factor of a model plane to the actual plane is 1 to 25.
Find the wing area of the model if the wing area of the actual plane is 300 ft2
.
Step-by-step explanation:
Length on model : Length on actual = 1 : 25
=> Area on model : Area on actual
= 1² : 25² = 1 : 625.
Therefore area on model = 300ft² * (1/625) = 0.48ft².
I bought apples and bananas at the store in a ratio of 3 apples to 4 bananas. If I bought 35 pieces of fruit. How many apples and bananas did I buy.
Answer:
15 apples
20 bananas
A total of 15 apples and 20 bananas has been bought.
How to form an equation?Determine the known quantities and designate the unknown quantity as a variable while trying to set up or construct a linear equation to fit a real-world application.
In other words, an equation is a set of variables that are constrained through a situation or case.
Let's say the number of apples = A
Number of bananas = B
Given that,
Apples and bananas at the store in a ratio of 3 apples to 4 bananas.
So,
A/B = 3/4
And,
A + B = 35
By substitution,
4(35 - B) = 3B ⇒ B = 20
And,
A = 35 - 20 = 15
Hence "A total of 15 apples and 20 bananas has been bought".
For more about the equation,
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Find the p value for a right tailed test about a mean with n=36 and test statistic t=46.2766 at 90% confidence level
Answer:
b
Step-by-step explanation: