8 boys, x girls, 4 pencils each, total number of pencils 52.
The equation can be 4(8+x) = 52
So lets solve:
4(8+x)=52
Divide 4 on both sides:
8 + x=52 / 4
8 + x = 13
Subtract on both sides:
x = 13 - 8
x = 5
There are 5 girls in the class.
Now lets solve to double check:
4(8+5)=52
4(13)=52
52 = 52
Yes!
This means that there are 5 girls in the class.
I hope this helps! :)
Taking into account the definition of equation, there are 5 girls in the class.
Definition of equationAn equation is defined as an equality established between two expressions, in which there may be one or more unknowns that must be solved.
In other words, an equation is the equality between two algebraic expressions connected through the equals sign in which one or more unknown values, called unknowns, appear in addition to certain known data.
Each equation has two members, and these are separated by using the equal sign (=), which in turn each of them are made up of terms.
The unknowns, that is, the values to be found, are represented by letters.
The equality between the two algebraic expressions is only verified for certain values of the unknown.
In this way, the solution of an equation means determining through certain procedures the value that satisfies it.
Equation for this situationA class has 8 boys and x girls. Each student has 4 pencils. The total number of pencils the students is 52.
An equation that models this situation is:
4×(8+x)= 52
It is considered that:
When a value you are adding goes to another side of the equation by subtracting.If a value you are subtracting goes to the other side of the equation by adding.When a value you are dividing goes to another side of the equation, it will multiply whatever is on the other side.If a value you are multiplying goes to the other side of the equation, then it will go by dividing everything on the other side.Solving in this case:
8 +x= 52÷4
8 +x= 13
x= 13 -8
x= 5
Finally, there are 5 girls in the class.
Learn more about equation:
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If -2 - 4x = -8x + 3x,
then what is X-2?
Answer:
-0.8
Step-by-step explanation:
-2 -4 = -8x + 3x
-6 =-5x
x = 1.2
so x-2 =
1.2 -2 = -0.8
x²-x-(a+1)(a+2)
Find common multiple
Answer:
x2 - x - a2 - 3a - 2
Step-by-step explanation:
STEP 1
((x2) - x) - (a + 1) • (a + 2)
STEP 2
Final result :
x2 - x - a2 - 3a - 2
a÷b when a = 2 and b = 1/2
Answer:
4
Step-by-step explanation:
a ÷ b = 2 ÷ 1/2 = 2 × 2/1 = 4
457x64-(163+208x45) + ( 2820÷20)-1802
Answer:
18064
Step-by-step explanation:
these equations are always in this order:
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
To remember this, my teacher told us the phrase; "Please Excuse My Dear Aunt Sally".
[tex](8+0+-2²-7)²+7[/tex]
[tex](8+0-2A^{2} -7 )A^{2} +7= (1-2A^{2} )A^{2}+7 = A^{2} -2A^4 +7[/tex]
ok done. Thank to me :>
f(x) = 2(x − 2)2 + 3
Answer:
4x-5
Step-by-step explanation:
the answer is 4x-5 as we apply multiplication and subtraction
Byron did 80% of the assignments this quarter. If he had a total of 20 assignments, how many did he do?
HELP ASAP I NEED IT BY 4:00 PLS HELPPPPPPPPPPPP
Answer:
5/20
quater is divided into 4 pieces to get a whole and 3/4 is 15 and 1/2 is 10 and 20 is whole and 1/4 is 5
What is 3, 4, 5, 6, and 7.
Use the ALEKS calculator to write9/16
as a decimal rounded to the nearest hundredth.
Find the missing angle. *
45
X
65
45
52
O 25
Answer:
Ans is 65
Mark me BRAINLIEST
Answer:
x is 45
Step-by-step explanation:
since the interior of a circle is 360, and that portion of the outside Is 45, we add 45 to get 90.since there are 4 quarter in a circle, each one would equal 90. 90 times 4 is 360.
Lindsay got her hair cut. The cost of a haircut
is $16. If she wants to tip her hairstylist 20%,
how much should she leave for the tip?
If triangle he an area of 36 and a height of 12 calculate the length of the base.
Answer:
Below.
Step-by-step explanation:
A = 1/2bh for a triangle.
36 = 1/2b(12)
36 = 6b
---- ----
6 6
b = 6
Tracy has 3/4 pounds of rice to give to 6 of her friends. If each
friends gets an equal amount, how much rice will each friend
receive?
Answer:
1/8 Pounds
Step-by-step explanation:
Since Tracy gives 3/4 pounds of rice to 6 of her friends, you will need to divide it among 6 people.
3/4 ÷ 6
= 3/4 * 1/6
= 1/4 * 1/2 (cross multiplication)
= 1/8.
Therefore, each of her 6 friends received 1/8 Pounds of rice
I hope this helped!
3/7 rounded to the nearest thousand
solve pls brainliest
Answer:
420
Step-by-step explanation:
300+40% equals 420 so he earned 420 last month from the commission
Answer:
$120
Step-by-step explanation:
A 40% commission means he earns 40% of the total revenue. That's 40% of $300 in this case.
To convert from a percentage to a multiplier, divide by 100:
[tex]\frac{40}{100} =0.4[/tex]
Then multiply the total revenue by that number:
[tex]300*0.4=120[/tex]
Alyssa fed her dog 2/3 cup of dog food in the morning and another 5/8 cup in the evening. How much did her dog eat over the course of the day? Write your answer as a mixed number
Answer:
1 7/24
Step-by-step explanation:
2/3 x 8/8= 16/24
5/8 x 3/3= 15/24
31/24 = 1 7/24
brainly helpppp me out
Answer:
D
Step-by-step explanation:
I think it might be (D) $2x-5
Marco is making a kite, using sticks for its diagonals. One stick is 2 feet long and the other is 3 feet long. How much material will Marco need to make the kite? 2 square feet 3 square feet 4 square feet 6 square feet.
Answer:
3 square feet
Step-by-step explanation:
Got it right because of the answer above :)
Marco will need 3 square feet of material to make the kite.
What is an expression?An expression contains one or more terms with addition, subtraction, multiplication, and division.
We always combine the like terms in an expression when we simplify.
We also keep all the like terms on one side of the expression if we are dealing with two sides of an expression.
Example:
1 + 3x + 4y = 7 is an expression.
3 + 4 is an expression.
2 x 4 + 6 x 7 – 9 is an expression.
33 + 77 – 88 is an expression.
We have,
We can use the formula for the area of a kite, which is:
A = (1/2) x d1 x d2
where d1 and d2 are the lengths of the two diagonals.
In this case,
d1 = 2 feet, and d2 = 3 feet.
Substituting these values into the formula, we get:
A = (1/2) x 2 feet x 3 feet
= 3 square feet
Therefore,
Marco will need 3 square feet of material to make the kite.
Learn more about expressions here:
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#SPJ7
1 + tan^2 (π/6) = _______.
A. csc^2 (π/6)
B. sec^2 (π/6)
C. cot^2 (π/6)
D. 1 - tan^2 (π/6)
Answer: B??
Step-by-step explanation:
Correc me if i wrong ovo
5.6p-3=-9+2(p+7) in a five step equation.
Answer:
p=2
Step-by-step explanation:
6p-3=-9+2(p+7)
6p-3=-9+2p+14 Distributive Property
6p-3=2p+5 Combine like terms/ Simplify
+3 +3
━━━━━━
6p=2p+8 Addition Property of Equality
-2p -2p
━━━━━━
4p=8 Subtraction Property of Equality
━ ━
4 4
p=4 Division Property of Equality
If the chance of rolling a 3 on a dice is 1/6, what is the chance of not rolling a
3?
Answer:
5/6
Step-by-step explanation:
Assuming we are using a standard 6-sided die, we can say that there are 6 numbers on the die. 1, 2, 3, 4, 5, and 6. The chance of rolling any number, including 3, is 1/6
The change of not rolling a 3 would be 5/6, because there are 5 other numbers besides 3
Please Help Me :) I'm giving brainliest to correct answers only and No LiNkS.
Answer:
c
Step-by-step explanation:
it makes the most sense
David drove 236 miles in 4 hours. On average, how fast did he drive, in miles per hour?
Answer:
59 mph
Step-by-step explanation:
236/4 = 59
Steps:
1. State the question: 236 miles in 4 hours
2. Now convert the question to equation: 236 miles/4 hours = question miles/hour
3. Divide: 59 miles/hour or 59 miles per hour
10 points, please fast !!!!!
Answer:
2/1 a improper fracrion 1/2 is a proper fraction
Step-by-step explanation: i just know those two sorry
Answer:
slope = 2
Step-by-step explanation:
slope is defined as change in y over change in x. for every +1 in the x direction, y receives +2. 2/1 = 2
Name the congruent triangles.
Answer:
ΔOGD≅ ΔPRC
Step-by-step explanation:
Choose the steeper line.
y=1/2x-3
or
y=1/4x -8
Hello there!
y=1/2x-3 is steeper than y=1/4x-8
The bigger the slope, the steeper the line.
Hope this helps!
~Just a cheerful teen
#CarryOnLearning
[tex]SilentNature[/tex] here to help
Steve increases his math average by 9 points over a period of 15 weeks. How many points per week did his average increase?
Answer:
.6 points per week
Step-by-step explanation:
9/15
HELP ASAP!!!
What are the zeroes of f(x) = x2 − 6x + 8?
x = −4, 2
x = −4, −2
x = 4, 2
x = 4, −2
Answer:
×=2 is the right answer
and ×= -4 also
information about five planets is shown in the table below. write down the name of the planet with the greatest mass
Answer:
Jupiter
Step-by-step explanation:
Jupiter is 318 times as massive as earth
Jupiter mass is 300 times more bigger than earth and it has a diameter at 140,000 km
How would you write 262 × 3 in addition form?
600 + 18 + 6
600 + 180 + 6
618 + 6
600 + 180 + 6 × 3
Answer:
262x3=768 so you need to find which answer equals 786 in addition form.
option a is equal to 624
option b is equal to 786
option c is equal to 624
option d is equal to 2358
your answer would be option b.
Step-by-step explanation:
hope this helps