x = total age of boys
x / 30 = 11yrs
Multiply both sides by 30
x = 330
y = total age of girls
y / 20 = 12
Multiply both sides by 20
y = 240
(240 + 330) / 50 = 11.4 yrs
The average age of the whole class = 11.4 years.
A class has 30 boys and 20 girls.
The average age of boys and girls is 11 and 12 respectively.
To Find:The average age of the whole class.
Solution:Boys = No. of boys × Age
Boys = 30 × 11 = 330
Girls = No. of girls × Age
Girls = 20 × 12 = 240
Average Age = Boys + Girls / Total no. of boys and girls
Average Age = 330 + 240 / 50
Average Age = 570 / 50
Average Age = 11.4
Answer:Average age of of the whole class is 11.4 .
Solve and show your work. Plz :)
Answer:
≠
Step-by-step explanation:
4[6(2+3)] _____ 125 - 5 * 1
4[6(5)] _____ 125 - 5 * 1
4[30] _____ 125 - 5 * 1
120 _____ 125 - 5 * 1
120 _____ 125 - 6
120 _____ 119
120 ≠ 119
Answer:
119.9
Step-by-step explanation:
Can someone help me with this question? Thanks if you do!
If mTUV = 9x + 1, and mTUW = 7x - 9, and mWUV = (5x-11), find the value of x
Answer:
x = 7
Step-by-step explanation:
We can't tell the order of angles here, so we'll assume that ...
m∠TUV = m∠TUW +m∠WUV
(9x+1) = (7x-9) +(5x-11)
9x +1 = 12x -20
21 = 3x
7 = x
intergers: -6+3 plz help me and plz show how you figured it out i can’t
Answer:
-3
this diagram might help you ( ◜‿◝ )♡
Answer:
Question : -6 + 3 =?
Answer : -3
6v²-19v-36
College Prep Math
Solve for n.
F=9/5(n-67)
Divide both sides by 9/5
9/5 F = N - 67
Add 67 to both sides
9/5 F + 67 = N
Hope this helped
what is 19.2 x 10^9 minutes in hours ANSWER ASAP PLSS
Answer:
19200000000
Step-by-step explanation:
1000000000 is 10^9. Then that times 19.2 is 19200000000.
(Hope this helped and have a great day)
(please mark this brainliest)
Tell whether (-3, 3) is a solution of the system.
Jeremiah makes a recipe that calls for 1 1/2 cups of flour and 3/4 stick of butter. If Jeremiah uses 3 sticks of butter, how many cups of flour will he need?
Answer:
6 cups of flour
Step-by-step explanation:
we know that
the ratio of the recipe=(1 1/2)/(3/4)
1 1/2=1.5 cups of flour
3/4 stick of butter-------> 0.75 stick of butter
by proportion
1.5/0.75=x/3---------> 3*1.5=0.75*x
x=3*1.5/0.75----------> x=6 cups of flour
PLEASE HELP I WILL MARK YOU BRAINLIEST
Answer:
2 miles
Step-by-step explanation:
Add the total distance for biking
4 1/4+5 1/2= 9 3/4
Now add the total distance for running
3 1/2+4 1/4 = 7 3/4
Now subtract
9 3/4 - 7 3/4 = 2
2 miles
Hope this helps!
i’m really stuck on this one if you can help i’d really appreciate it
you're correct. its to take out the greatest common factor.
(2,2), (-3,3) find the distance between the two points round to the nearest tenth.
Answer :
[tex]d = \sqrt{26} [/tex]
You are creating identical coupon booklets to sell for a fundraiser. You have 40 dry-cleaning coupons, 24 coupons for a local restaurant, and 31 movie theater coupons. 5b) You find one additional movie theater coupon. What is the greatest number of identical coupon booklets you can make?
Answer:
if you're trying to make it with one of each kind in each booklet the answer is 24
Whoever answers first is brainliest
Answer:
Let the truck is driven X miles per day
Charges of company A will be = 90+0.4X
Charges of company B will be =30+0.7X
Let us find out value of X when charges of both companies are same
which means that 90+0.4 X= 30+0.7X
90-30 = 0.7X-0.4X
60 = 0.3X
60/0.3 = X
X= 200
The charges of both companies will be same if truck is driven 200 miles per day
Company A will have better deal if truck is driven more than 200 miles per day ( because per mile rate of company A is less than company B)
Step-by-step explanation:
Express your answer as a polynomial in standard form. f(x)= f(x)= \,\,3x^2+6x+5 3x 2 +6x+5 g(x)= g(x)= \,\,-x+3 −x+3 \text{Find: }f(g(x)) Find: f(g(x))
The value of f(g(x)) is, [tex]f(g(x))=3x^{2} -24x+50[/tex]
Composition of function:The given function are,
[tex]f(x)=3x^{2} +6x+5\\\\g(x)=-x+3[/tex]
We have to find [tex]f(g(x))[/tex].
[tex]f(g(x))=f(-x+3)=3(-x+3)^{2}+6(-x+3)+5\\ \\f(g(x))=3(x^{2} +9-6x)-6x+18+5\\\\f(g(x))=3x^{2} +27-18x-6x+23\\\\f(g(x))=3x^{2} -24x+50[/tex]
Thus, the value of [tex]f(g(x))=3x^{2} -24x+50[/tex]
Learn more about the Polynomials here:
https://brainly.com/question/2833285
help me find p=
325+7=332
Answer:
p = 332
Step-by-step explanation:
Its the same dropdown for every question, what is the answer for each one
Answer:
2.5y, y = -5.2
2.5(-5.2) = -13
2x² + y, x = -2, y = 5
2(-2)² + (5)
2(4) + 5
8 + 5 = 13
a(b), a = 2/3, b = 9/14
(2/3)(9/14)
cross simplify
(1/1)(3/7) = 3/7
please help me on this
Answer:
12x+10
Step-by-step explanation:
Add up the lengths of all sides to find the perimeter
P = x + 2( x+5) + 6(x-1) + 3(x+2)
Distribute
= x + 2x+10 +6x-6 + 3x+6
Combine like terms
=x+ 2x+ 6x+3x + 10 -6+6
= 12x+10
While sitting in class you overheard one of your classmates say, "This equation has infinite solutions, because when I put it in Desmos it gave me parallel lines so I know it makes a conditional equation." Realizing that the student is incorrect, what would you say to help your classmate get their facts straight?
Answer:
See below
Step-by-step explanation:
The systems of linear equations represent two lines.
There are 3 possible outcomes with two lines on the plane.
1. Lines intersect
In this case there is one solution, which is the point of intersection.2. Lines are parallel
In this case the lines never intersect, so there is no solution2. Lines are same
In this case the lines overlap, so there are infinitely many solutions.can someone please help me i don’t understand it
Answer:
d= bv + r
Treat it like you would a normal equation. Multiply by b and add r to isolate d.
if you're driving 30 miles per hour how many hours does it take to drive 60 miles?
Answer:2 hours
Step-by-step explanation:
Solve the equation for the variable.
[tex] - 5.2x + 57.9 = 15.9 + 1.8x[/tex]
x = [?]
Answer:
x = 6
Step-by-step explanation:
Given
- 5.2x + 57.9 = 15.9 + 1.8x ( subtract 1.8x from both sides )
- 7x + 57.9 = 15.9 ( subtract 57.9 from both sides )
- 7x = - 42 ( divide both sides by - 7 )
x = 6
2x – 10 = 1/2(x – 8)
Answer:
X= 4
Step-by-step explanation:
PLEASE HELP I WILL MARK YOU BRAINLIEST
Answer:
The correct answer is A. The base of the rectangular prism must be 12 units because the height is 2 units, and 2 multiplied by 12 is 24, which is the total volume of the prism.
What is the volume of a sphere with a radius of 8 m, rounded to the nearest tenth of a cubic meter?
Answer:
267.94
Step-by-step explanation:
V=4/3(pi)r^2
V=4/3(3.14)8^2
V=4/3(3.14)64
V=4/3(200.96)
V=267.94
Answer:
2144.7 m^3
Step-by-step explanation:
Find the x and y intercepts of the graph of the function
Answer:
y intercepts= 0 x intercepts= none
nation:
The 2 funtions above the x axis do not intercept with the y-axis or the x-axis. They just hover above it, but never atcually touch it.
The function bellow the x-axis only intercepts the y-axis at 0,0
The x and y intercepts of the graph of the function are x=none and y=-1 respectively.
From the given figure we need to find the x and y intercepts of the function.
What is x and y intercepts of the function?The x-intercept is where a line crosses the x-axis, and the y-intercept is the point where the line crosses the y-axis.
From the graph, we can see two curves running on x-axis.
The curve crosses the y-axis at y=-1.
Therefore, the x and y intercepts of the graph of the function are x=none and y=-1 respectively.
To learn more about the x and y intercepts visit:
https://brainly.com/question/14180189.
#SPJ5
f(x)+x^2+7 Find X if f(x)=23
Answer:
Step-by-step explanation:
x^2 + 7 = 23
x^2 = 16
√x² = √16
x = 4
Find (f•g)(-4) if f(x)= 3x +6 and g(x)=3x+6.
Answer:
-12
Step-by-step explanation:
(f·g)(-4) = f(g(-4))
g(-4) = 3(-4)+6
g(-4) = -12 + 6
g(-4) = -6
f(g(-4)) = f(-6) = 3(-6) +6
f(g(-4)) = -18 + 6
f(g(-4)) = -12
(ANSWER FOR POINTS AND BRAINLEST!!!) Identify the scale factor in the image below.
1.) 2
2.) 1/2
3.) 3/2
4.) 2/3
Answer:
it should be 3/2 !
Evaluate: the product of 4 and 7*
Answer:
28
Step-by-step explanation:
4 x 7 = 28
Hope this helps you :)