Answer:
3/4 of 21
Step-by-step explanation:
The equation which can be used to find the number of students in the class is [tex]\frac{3}{4} \times x = 21[/tex].
Let us denote the total number of students in Ms. Smith's class as "x".
We are given that 3/4 of the students in the class like pizza, and this amounts to 21 students.
We can set up the following equation to represent this information:
[tex]\frac{3}{4} \times x = 21[/tex]
In this equation, (3/4) represents the fraction of students who like pizza, and we multiply it by "x" to find the total number of students who like pizza. This expression should be equal to 21.
Hence, [tex]\frac{3}{4} \times x = 21[/tex] is the equation can be used to find the number of students in the class.
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Can someone please help with these two questions . Thank you
Answer:
D for the first question
A for the second one
Step-by-step explanation:
The multiples are 27, 81, 243
The factors are 1, 9, 27
9b+10=20b+7. What's B?
Answer:
3/11
Step-by-step explanation:
9b+10=20b+7
=> 10 - 7 = 20b - 9b
=> 3 = 11b
=> 11b = 3
[tex] = > b = \frac{3}{11} [/tex]
Inscribed angles!!
Find A, B, and C
sum of all exterior angles equals to 360
sum of interior angles equal to 180
divide 360 by 122 to find b the rest you'll get it
as you go further in the question
ill mark brainlist plss help
he is going to need 37.5 ounces I guess
Find the area of the base of a box of height 4cm and lateral surface area 120cm.sq if its length is twice its breadth.
Answer:
The area of the base of a box is 1800 cm².
Step-by-step explanation:
We have:
H: is the height = 4 cm
[tex]A_{l}[/tex]: is the lateral surface area = 120 cm
L = 2B
We can find the breadth of the base by using the lateral surface area and the height:
[tex] A_{l} = H*B [/tex]
[tex] B = \frac{A}{H} = \frac{120 cm}{4 cm} = 30 cm [/tex]
Now, if the length is twice its breadth we have:
[tex] L = 2B = 2*30 cm = 60 cm [/tex]
Hence, the area of the base is:
[tex] A_{b} = B*L = 60 cm*30 cm = 1800 cm^{2} [/tex]
Therefore, the area of the base of a box is 1800 cm².
I hope it helps you!
Sally's dance school had 60 students last year. This year there are only 48 students enrolled. By
what percent did the enrollment decrease? Show all of your work to justify your answer.
Answer:
20%
Step-by-step explanation:
60-48=12
changed ÷ original x 100%
= 12 ÷ 60 x 100%
= 20%
help a dude out lol this is overdue
Answer:
5
Step-by-step explanation:
The right angle is 5 so that means the x is 5
Answer:
5
Step-by-step explanation:
9+6=15, 3*3=9 3*5=15 so the answer for x is 5
The population of a certain animal species decreases at a rate of 2.5%. If there are 400 of this animal in the wild, using an exponential function, predict approximately how many there will be in 4 years. Round to the nearest whole number.
Answer:
20 years
Step-by-step explanations:
You just do the work and figure it out and it gives you the answer of 20 years
Angela makes a pillow in the shape of a wedge to use for watching TV. The pillow is filled with 0.35\text{ m}^30.35 m 3 0, point, 35, start text, space, m, end text, cubed of fluffy material.
Complete question :
Angela makes a pillow in the shape of a wedge to use for watching TV. The pillow is filled with 0.35 m3 of fluffy material, with base 0.5 m and height 1m
What is the length of the pillow?
Answer:
1.4 m
Step-by-step explanation:
The volume of wedge is given by:
V = Area of triangle * length
Area of triangle = 1/2 * base * height
Volume of wedge = 1/2 * base * height * length
Volume of wedge = 0.35m³
0.35 = 0.5 * 0.5 * 1 * length
0.35 = 0.25 * length
Length = 0.35 / 0.25
Length = 1.4 m
Answer:
1.4
Step-by-step explanation:
KAAAAAAAAAAAAAAHN!!!!!!!!!!!!!!
what is the radius and diameter of the following circle 4.2 cm?
plz help me with this asap
81x^2 − 49y^2
Factorize each completely
1. y^2 − 1
2. x^2 − 2^2
3. x^2 − 4y^2
4. x^2 − 25b^2
5. 36 − 9m^2
6. 36a^2 − 169x^2
7. 81x^2 − 49y^2
8. 49r^2 − 16s^2
9. 144x^2 − 49
10. 64x^2 − 25
11. 81a^2 − 64b^2
12. 1 − 16x^2
13. 49x^2 − 1
14. (a + b)^2 − 2^2
15. (a − b)^2 − 1
Answer:
i will answer THIS.. just give me some time
Which of the following is an example of natural selection?
A) Hummingbirds drinking nectar from a plant.
B) Whales and dolphins swimming to the water’s surface to breathe.
C) Sloths making their homes high in trees to protect themselves from predators.
D) Brown-colored lizards surviving and reproducing because they are better able to camouflage themselves from predators.
Answer:
A) Hummingbirds drinking nectar from a plant.
Step-by-step explanation:
Here are some examples of natural selection: In a habitat there are red bugs and green bugs. The birds prefer the taste of the red bugs, so soon there are many green bugs and few red bugs. The green bugs reproduce and make more green bugs and eventually there are no more red bugs.
can someone help me solve x + 5 = 12
Step-by-step explanation:
Given.
x + 5 = 12
x = 12 - 5
x = 7
Hope it will help ☜☆☞
Alaina needs to sell 225 boxes in order to be the top seller. She sells thin mints and samoas to all of her customers for a total of $628.00 in sales. The thin mints sell for $3.00 each and the samoas sell for $2.50 each. Which system of equations below could be used to find how many boxes of thin mints and samoas were sold?
Answer:
94 boxes of samoas
131 boxes of thin mints
Step-by-step explanation:
m=mints
s=samoas
s+m=225 m=225-s
s(2.5)+m(3)=628
2.5s+3m=628
substitute for m
2.5s+3(225-s)=628
2.5s+675-3s=628
reduce
-0.5s=-47
s=94
m=131
You have a sack of 90 balls. 35 blue, 30 green and 25 pink. If you randomly pull one ball out of the bag, what is the probability of pulling a green ball?
Answer:
P(Green ball) = 1/3
Step-by-step explanation:
You have a sack of 90 balls. 35 blue, 30 green and 25 pink. If you randomly pull one ball out of the bag, what is the probability of pulling a green ball?
The Probability of pulling a green ball =
P(Green ball) =
Number of green balls/ Total number of balls
= 30 green balls/90 balls
P(Green ball) = 1/3
A sales woman earns 40% commission on all merchandise that she sells last month she sold $300 worth of merchandise how much commission in dollars did she earn last month
Answer:
120$
Step-by-step explanation:
I need help this is an I ready
Answer:
distributive property
Step-by-step explanation:
You multiply the 2 by the things inside of the parentheticals (distribute)
Answer:
a
Step-by-step explanation:
Distributive property.
What is the equation of the line that passes through the point (3, -1) and is perpendicular to the equation y = -3x + 2?
Answer:
is X= Y= -2 3
Step-by-step explanation:
is easy question
525=w(w+20) what is the length and width using this formula
Answer:
525/22
Step-by-step explanation:
Plz help me get the right answer
Answer:
Sum is the addition -8x^2+3-9x^2+3x-3 Combine like terms -17x^2+3xKelly tiene algo de dinero ahorrado. Después de cortar el césped el sábado, agrega $ 40 a sus ahorros. Escribe una expresión para representar cuánto dinero ha ahorrado Kelly
Answer:
x + 40
Step-by-step explanation:
Con la informacion de la pregunta vemos que Kelly tiene una cierta cantidad de plata ahorrada. Este ahorro se puede demonstrar con la variable x. Despues de completar su trabajo le pagaron $40 y los agrego a sus ahorros. Entonces simplemente tenemos que sumar los $40 a los ahorros que ya tenia (x). Esto nos dara la cantidad nueva de sus ahorros
x + 40
A restaurant bill is $84.97 estimate a 20% tip
Answer: A 20% tip of $84.97 is $12.75 the total would then be $97.72
Step-by-step explanation:
The expression - 270+ 13m represents a submarine that began at a depth of 270 feet below sea
level and ascended at a rate of 13 feet per minute. What was the depth of the submarine after 7
minutes?
Select the correct answer below and, if necessary, fill in the answer box to complete your choice.
OA. The submarine was
feet below sea level after 7 minutes.
OB. The submarine will have reached sea level after 7 minutes.
Answer:
The submarine would be 179 feet below sea level
Step-by-step explanation:
m = 7
13 x 7 = 91
-270 + 91 = -179
After 7 minutes submarine was at -17 feet.
What is an expression?An expression is a combination of terms that are combined by using mathematical operations such as subtraction, addition, multiplication, and division.
Given that, the expression - 270+ 13m represents a submarine that began at a depth of 270 feet below sea level and ascended at a rate of 13 feet per minute.
A) Here, m=7
-270+13(7)
= -270+91
= -179
B) No
Therefore, after 7 minutes submarine was at -17 feet.
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"Your question is incomplete, probably the complete question/missing part is:"
The expression - 270+ 13m represents a submarine that began at a depth of 270 feet below sea level and ascended at a rate of 13 feet per minute. What was the depth of the submarine after 7 minutes?
Select the correct answer below and, if necessary, fill in the answer box to complete your choice.
A. The submarine ___ was feet below sea level after 7 minutes.
(Type an integer or a decimal:)
B. The submarine will have reached sea level after 7 minutes.
Find the missing value. Hint: Use the number line to find the missing value. -7= -(-2)
Answer:
-9
Step-by-step explanation: I know this problem since I use khan academy too and I got the answer wrong and it helped by saying it was -9.
which quantity is proportional to 6/4?
check all that are true
36/24
2/3
72/36
3/2
91/48
hi please help me with this i’ll give brainliest if you give a correct and show your work!
how to find the angle?
please help I'll give BRAINIEST
** if there is two responses **
Answer:
m∠CDE = 37°
Step-by-step explanation:
Since, AB║CD and AC is a transversal line.
∠EAB ≅ ∠ECD [Alternate interior angles]
m∠EAB = m∠ECD = 25°
m∠CED + m∠AED = 180° [Linear pair of angles]
m∠CED + 62° = 180°
m∠CED = 180° - 62°
= 118°
By triangle sum theorem In ΔCDE,
m∠CED + m∠CDE + m∠ECD = 180°
118° + m∠CDE + 25° = 180°
m∠CDE + 143° = 180°
m∠CDE = 37°
what is the height of the waterfall? WILL MARK BRAINLIST FOR CORRECT ANSWER.
Answer:
11 ft
Step-by-step explanation:
mark me as brainliest
I don’t know if it’s decreases or increases
Answer:
I'm pretty sure decreases since the number is negative
Please help!! Question is above in the image
9514 1404 393
Answer:
$503.85
Step-by-step explanation:
The amortization formula can help with this.
A = P(r/12)/(1 -(1 +r/12)^(-n))
where P is the loan value, A is the monthly payment, r is the annual interest rate, and n is the number of monthly payments.
We want to find P. All of the other values are given.
P = A(1 -(1 +r/12)^-n)/(r/12)
P = 32.48(1 -1.012667^-18)/(0.012667) = 31.48·16.0054
P ≈ 503.85
The equivalent cash price is about $503.85.